The present invention relates to macrolide derivatives, and to the preparation and therapeutic use thereof. The compounds according to the present invention have substantial antimicrobial activity, mainly on gram-positive microorganisms, and also on mycobacteria, especially in the treatment of tuberculosis.

Due to the appearance of resistance, the development of novel antibacterial agents is necessary to make it possible to kill or to prevent the growth of mycobacteria, especially those which induce tuberculosis.

Tuberculosis is a disease which, at the present time, is still a worldwide health threat. Globally, a third of the human population is infected with Mycobacterium tuberculosis. Despite the fact that treatments exist and that the disease is curable, tuberculosis killed approximately 1 .82 million people in 2008, and its global incidence increases by 1 % per year, with an estimation in 2008 of 9.4 million annual new cases of declared disease. Added to this are the difficulties of correct prescription and of adherence to the treatment protocols, and also the emergence of multi-resistant strains of M. tuberculosis. Drug-drug interactions also interfere with the optimum treatment of AIDS and tuberculosis in the case of co-infected patients.

The common treatment protocols for combating sensitive strains of M. tuberculosis are mainly based on a combination of three or, more frequently, of four molecules: isoniazide (I NH), rifampicin (RIF), pyrazinamide (PZA) and ethambutol (EMB). These drugs constitute the "first-line" treatment.

In recent decades, tuberculosis has become resistant to each of these molecules.

Strains that are resistant at least to isoniazide and to rifampicin are referred to as "multi- resistant" (MDR-TB). Recently, novel strains have appeared which are resistant to a larger number of molecules: those that are resistant to isoniazide, to rifampicin, to fluoroquinolones and to at least one injectable second-line drug are defined as being "ultra-resistant" (XDR-TB).

According to an estimation made by the WHO in 2009, there were 0.5 million cases of MDR-TB in 2007. Other evaluations report a relative incidence of about 1 1 % of multi-resistant strains among all new cases of tuberculosis.

Another therapeutic drawback in the treatment of tuberculosis is the interaction of rifampicin with treatments for combating HIV (human immunodeficiency virus), which represents an obstacle in the treatment of patients co-infected with tuberculosis and HIV. The current anti-HIV therapeutic recommendations favour, as a first-line treatment, an anti-retroviral triple therapy combining a protease inhibitor (PI ) or a non-nucleoside reverse transcriptase inhibitor (NNRTI) with two nucleoside reverse transcriptase inhibitors (NRTI). PI and NNRTI are metabolized by CYP3A4. Metabolic interactions between anti-retrovirals (ATRV) and certain combined drugs have been demonstrated. Thus, rifampicin, which is a powerful inducer of intestinal and hepatic CYP3A4, reduces the concentrations of ATRV.

There is an urgent need to develop improved therapies for combating tuberculosis. These novel anti-tuberculosis treatments should be capable of satisfying one or more of the following criteria:

• shorten the treatment time to improve the adherence to the treatment protocols and reduce the appearance of resistant bacteria,

• be well tolerated, acting via novel mechanisms of action and thus effective against multi-resistant and/or ultra-resistant strains,

• be active against tuberculosis.

• have a shortened latent tuberculosis (asymptomatic first infection) treatment time, so as to address the problem of the biological reservoir of M. tuberculosis.

FR 2 126 108 and Arnoux et al. (Journal of the American Chemical Society 102(10), 1980, 3605) describe sequanamycin (A), having the following formula:

(3S,4S,5R,7S,9S,10S,11 ,12S,13R)-12-[(4,5-dihydroxy-4,6-dimethyltetrahydro- 2H-pyran-2-yl)oxy]-7-hydroxy-2-{1-[(5-hydroxy-3,4-dimethoxy- 6-methyltetrahydro-2H- pyran-2-yl)oxy]propan-2-yl}-10-[(3-hydroxy-6-methyl-4-oxotet rahydro-2 -/-pyran-2-yl)oxy]- 3,5,7,9,1 1 ,13-hexamethyl-6,14-dioxooxacyclotetradecan-4-yl) 3-methylbutanoate.

This compound is described therein as an antimicrobial agent and especially enables the treatment of tuberculosis. However, this compound may show instability, in particular in acidic or basic aqueous medium, and/or may also show metabolic instability, which makes it difficult to use as a drug. It is therefore necessary to develop compounds with improved and/or more active pharmacokinetic properties, so as to enable their use as medicaments.

A subject of the present invention is in particular macrolide derivatives, which have bacteriostatic and/or bactericidal action, mainly on gram-positive microorganisms, and also on mycobacteria, especially against strains of sensitive Mycobacterium or Corynebacterium that are resistant to the first-line antibiotics, and the preparation and therapeutic uses thereof. [COMPOUNDS]

The present invention relates to compounds corresponding to formula (I):

in which:

- Y represents a hydrogen atom, a group -(C=0)-NR2R3 or a group -(C=0)-0-Ri8;

- Z represents:

• a hydrogen atom,

• a group -C _1-6 -alkyl, which is unsubstituted or substituted with one or more groups R ₄ ,

· a group -C ₃ - ₇ -cycloalkyl, which is unsubstituted or substituted with a group -NH-

(C=0)-Ri 9 or with a group -NH-SO2-R20.

• a group -Cs-e-heterocycloalkyl,

• a group -NH-(C=0)-R ₅ ; Ri represents a hydrogen atom, a group -C2-6-alkenyl, a group -C2-6-alkynyl or a group -C-j-6-alkyl which is unsubstituted or substituted with a group -C-| _-4 - fluoroalkyl or with a heteroaryl group which is unsubstituted or substituted with a group 3-(3-fluorophenyl)-2-oxo-1 ,3-oxazolidin-5-ylmethyl;

R2 represents a hydrogen atom or a group -Ci_6-alkyl;

R3 represents:

• a group -C3_7-cycloalkyl, which is unsubstituted or substituted with a group -C-i-3-alkyl substituted with a group -NH-SO2-R21 ,

• a heteroaryl group,

• a linear or branched group -Ci_6-alkyl, which is unsubstituted or substituted with a group chosen from:

• a group -NH-Re,

• a group -NH-SO2-R7,

• a group -NH-(C=0)-Rs,

• a group -C3_7-cycloalkyl, which is unsubstituted or substituted with a group -C3.6-heterocycloalkyl,

• a group -C3_6-heterocycloalkyl,

• an aryl group, which is unsubstituted or substituted with one or more groups chosen independently from a halogen atom and a group -C-| _-4 - fluoroalkyl,

• a heteroaryl group, which is unsubstituted or substituted with a group -C-i-3-alkyl, a group -C-|_4-alkoxy, a group -C-j-4-fluoroalkyl or a group

-C3-6-heterocycloalkyl,

• or alternatively with one or more groups -Ci _-4 -alkoxy; or alternatively R2 and R3, together with the nitrogen atom to which they are attached, constitute a group -C3-6-heterocycloalkyl chosen from: aziridine, azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine or piperazine; the said heterocycloalkyl group being unsubstituted or substituted with a heteroaryl group, the said heteroaryl group being unsubstituted or substituted with a group

-C-i-4-fluoroalkyl; R ₄ independently represents a group chosen from:

a hydroxyl group,

a deuterium,

a halogen atom,

a group -Cs-z-cycloalkyl,

an aryl group, which is unsubstituted or substituted with one or more groups

-R ₉ ,

a heteroaryl group,

a group -C3..6-heterocycloalkyl,

a group -Ci _-4 -alkoxy,

a group -(C=O)-NH-R ₁₀ ,

a group -NH-R-n ,

a group -NH-(C=0)-R-|2,

or a group -N H(S02)- i 3; R5 represents a heteroaryl group;

Re represents a heteroaryl group, which is unsubstituted or substituted with one or more halogen atoms;

R7 represents a group -Ci _-4 -fluoroalkyl, an aryl group or a heteroaryl group, the said aryl and heteroaryl groups being unsubstituted or substituted with one or more groups Ry;

RQ represents a heteroaryl group, which is unsubstituted or substituted with one or more groups R?;

Rg represents a halogen atom, a group -Ci _-4 -alkoxy, a formyl group (CHO) or a group -C-i- -alkyl, which is unsubstituted or substituted with a hydroxyl group; R-i o represents a heteroaryl group, which is unsubstituted or substituted with a group -C-i-3-alkyl;

R-1 1 represents:

• a group -C3_i o-heterocycloalkyl, which is unsubstituted or substituted with one or more oxide groups, • a heteroaryl group or an aryl-Ci_4-alkyl group, the said heteroaryl or aryl groups being unsubstituted or substituted with one or more groups independently chosen from a halogen atom, a hydroxyl group, a nitro group and a group -C-i-3-alkyl; - -12 represents:

• a group -Ci _-4 -alkoxy,

• a group -Ci _-4 -alkyl, which is unsubstituted or substituted with a group -NR-14R-15 or with a heteroaryl group, the said heteroaryl group being unsubstituted or substituted with a group -C-i-3-alkyl,

· a heteroaryl group, which is unsubstituted or substituted with one or more groups chosen from a hydroxyl group and a group -Ci-3-alkyl;

- R-13 represents:

• a group -Ci _-4 -alkyl,

• a group -Ci _-4 -fluoroalkyl,

· an aryl group, which is unsubstituted or substituted with a nitro group,

• or a heteroaryl group, which is unsubstituted or substituted with a group

-N R ₁₆ R _{1 7} ;

- R-14, R-15, R-I 6 and R-| ₇ each independently represent:

• a hydrogen atom,

· or a group -Ci _-4 -alkyl;

R-I 3 represents a group -C-| ₄ -alkyl or a benzyl group;

R-I 9 represents an aryl group or a heteroaryl group;

- R20 represents a group -Ci _-4 -alkyl or an aryl group;

- R21 represents an aryl group;

- Ry represents:

• a halogen atom,

• a group -Ci _-4 -alkoxy,

• a group -C-| . ₄ -fluoroalkyl,

• a group -OCF3, • a nitro group,

• a group -NH2,

• a group -NHCH3;

- F¾' represents:

· a hydroxyl group,

• a group -Ci-6-alkyl.

The compounds of general formula (I) may comprise one or more asymmetric carbons. They may therefore exist in the form of enantiomers or diastereoisomers. These enantiomers, diastereoisomers, and also mixtures thereof, including racemic mixtures, form part of the invention.

The compounds of formula (I) may exist in the form of bases or acid-addition salts. Such addition salts form part of the invention.

These salts are advantageously prepared with pharmaceutically acceptable acids, but salts of other acids, for example for purifying or isolating the compounds of general formula (I), also form part of the invention.

The compounds of formula (I) according to the present invention also comprise those in which one or more hydrogen, carbon or halogen atoms, especially chlorine or fluorine atoms, have been replaced with their radioactive isotopes, for example deuterium or tritium to replace hydrogen or carbon-14 to replace carbon-12. Such labelled compounds are useful in research, metabolism or pharmacokinetic studies, and also in biological and pharmacological tests as tools.

In the context of the present invention:

• a Iky I represents a saturated, linear or branched aliphatic group; for example, a group

C-i-3-alkyl represents a linear or branched carbon-based chain of 1 to 3 carbon atoms, especially a methyl, ethyl, propyl or isopropyl. Similarly, a group C- -alkyl represents a linear or branched carbon-based chain of 1 to 4 carbon atoms, especially a methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl or ferf-butyl. Similarly, a group C _h alky! represents a linear or branched carbon-based chain of 1 to 6 carbon atoms, especially a methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, ferf-butyl, pentyl, isopentyl, neopentyl, ferf-pentyl, hexyl or isohexyl. alkenyl represents a linear or branched hydrocarbon-based aliphatic group comprising at least one unsaturation in the form of a double bond, and comprising from 2 to 6 carbon atoms. Examples that may be mentioned include the vinyl and allyl groups. alkynyl represents a linear or branched hydrocarbon-based aliphatic group comprising at least one unsaturation in the form of a triple bond, and comprising from 2 to 6 carbon atoms. Examples that may be mentioned include the ethynyl and 2-propynyl groups.

cycloalkyl represents a saturated cyclic aliphatic group comprising from 3 to 7 carbon atoms. Examples that may be mentioned include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and cycloheptyl groups.

halogen represents a fluorine, chlorine, bromine or iodine atom.

fluoroalkyi represents an a Iky I group comprising from 1 to 4 carbon atoms, in which one or more hydrogen atoms are replaced with a fluorine atom. Examples of fluoroalkyi groups that may be mentioned include trifluoromethyl, difluoromethyl, 3,3,3- trifluoropropyl, 2,2,2-trifluoroethyl, 2,2-difluoroethyl, 2,2,3,3-tetrafluoropropyl, 1 , 1 - difluoroethyl and 3,3,3-trifluoro-2-(trifluoromethyl)propyl.

heterocycloalkyl represents a saturated or partially saturated, monocyclic or polycyclic, optionally substituted 3- to 9-membered ring including one or more heteroatoms such as nitrogen, oxygen or sulfur atoms. The sulfur atoms may be in the form of sulfoxide or sulfone. By way of example, a heterocycloalkyl may be a pyrrolidine, a morpholine, a piperazine, a diazetidine, a dihydropyrrolidine, a piperidine, an azepane, an imidazolidine, a thiomorpholine, a tetrahydropyran, a tetrahydrothiophene, a tetrahydrothiopyran, a diazepane or an azabicyclooctane, a tropane, a 3,6- diazabicyclo[3.1 .0]hexane, a tetrahydrofuran, a 3,7-diazabicyclo[3.3.1 ]nonane or a tetrahydrothiophene 1 , 1 -dioxide.

aryl represents a monocyclic or polycyclic, optionally substituted aromatic system comprising from 6 to 14 carbon atoms. According to one embodiment of the invention, the aryl group comprises 6 to 10 carbon atoms. When the system is polycyclic, at least one of the rings is aromatic. Examples of aryl groups that may be mentioned include phenyl, naphthyl, indanyl, tetrahydronaphthyl, anthracenyl and azulenyl.

heteroaryl represents a monocyclic or polycyclic, optionally substituted 5- to 14- membered aromatic system. According to one embodiment of the invention, the heteroaryl is 5- to 10-membered and comprises one or more heteroatoms such as nitrogen, oxygen or sulfur atoms. When the system is polycyclic, at least one of the rings is aromatic. Examples of monocyclic heteroaryls that may be mentioned include thiazole, thiadiazole, thiophene, imidazole, triazole, tetrazole, pyridine, furan, oxazole, isoxazole, oxadiazole, pyrrole, pyrazole, pyrimidine, pyridazine and pyrazine. Examples of polycyclic heteroaryls that may be mentioned include indole, benzofuran, benzimidazole, benzothiophene, benzotriazole, benzothiazole, benzoxazole, quinoline, isoquinoline, indazole, quinazoline, phthalazine, quinoxaline, naphthyridine,

2,3-dihydro-1 H-indole, 2 , 3-d i hyd robenzofu ra n , tetrahydroquinoline, tetrahydroisoquinoline, tetrahydroisoquinazoline, furo[3,2-c]pyridine, 1 H-pyrrolo[2,3- b]pyridine or tetrahydroquinazoline.

• alkoxy represents a group O-alkyI containing a saturated, linear or branched aliphatic chain comprising 1 to 4 carbon atoms. Examples of alkoxy groups that may be mentioned include methoxy and ethoxy.

According to the present invention, distinguished compounds are those of formula (I) in which Y re resents a group -(C=0)- R2R3, of formula:

in which R-i , R2, R3 and Z are as defined for the compounds of formula (I);

in the form of bases or of acid-addition salts.

According to the present invention, distinguished compounds are also those of formula (I) in which Y represents a hydrogen atom, of formula:

in which and Z are as defined for a compound of formula (I);

in the form of bases or of acid-addition salts.

According to a first variant of formula (IA), R2 represents a hydrogen atom and R3 represents a linear Ci 6-alkyl (Alk), which is unsubstituted or substituted with a group as defined for the compounds of formula (I), the compounds then having the formula (IC) below:

in which Ri and Z are as defined for the compounds of formula (I);

in the form of bases or of acid-addition salts. Within the compounds of formula (IC), distinguished compounds are those formula (I D) below in which Alk represents a methyl substituted with a phenyl group:

and Ri and Z are as defined for a compound of formula (I);

in the form of bases or of acid-addition salts.

According to a second variant of formula (IA), distinguished compounds are those of formula (I E) in which R2 represents a hydrogen atom and R3 represents a branched Ci-6-alkyl (-C(CH3)2-Alk'), which is unsubstituted or substituted with a group as defined for the compounds

and Ri and Z are as defined for the compounds of formula (I);

in the form of bases or of acid-addition salts. Within the compounds of formula (I E), distinguished compounds are those of formula (IG) below in which Alk' represents a [(phenylsulfonyl)amino]methyl group:

and Ri and Z are as defined for the compounds of formula (I);

in the form of bases or of acid-addition salts.

According to a third variant of formula (IA), R2 and R3 represent an unsubstituted group -Ci-6-alkyl (Alk), the compounds then having the formula (I F) below:

in which R-i and Z are as defined for a compound of formula (I);

in the form of bases or of acid-addition salts. According to a fourth variant of formula (IA), f¾ represents a hydrogen atom and

R3 represents an unsubstituted group -C3-7-cycloalkyl (cycloAlk), the compounds then having the form

in which Ri and Z are as defined for a compound of formula (I);

in the form of bases or of acid-addition salts.

According to the present invention, distinguished compounds are also those of formula (I) in which Y represents a group -(C=0)-OR-i8, of formula:

in which R-| , R-| 8 and Z are as defined for a compound of formula (I);

in the form of bases or of acid-addition salts. According to the present invention, distinguished compounds are those of formula (I) in which:

- Y represents a hydrogen atom, a group -(C=0)-NR2R3 or a group -(OO)-OMe;

- Z represents:

• a hydrogen atom,

• a group -C-|_6-alkyl, which is unsubstituted or substituted with one or more groups R ₄ ,

• a cyclopropyl group, a cyclobutyl group, a 3-(benzoylamino)cyclobutyl group, a 3-[(pyrazin-2-ylcarbonyl)amino]cyclobutyl group, a 3-[(methylsulfonyl)amino] cyclobutyl group, a 3-[(phenylsulfonyl)amino]cyclobutyl group, a cyclopentyl group, a cyclohexyl group,

• a tetrahydro-2H-pyranyl group,

• a group -NH-(C=0)-R5;

Rl represents a hydrogen atom, an ethyl group, a 2,2,2-trifluoroethyl group or a methyl group, which is unsubstituted or substituted with a 1 ,2,3-triazole group substituted with a 3-(3-fluorophenyl)-2-oxo-1 ,3-oxazolidin-5-ylmethyl group;

R2 represents a hydrogen atom or a methyl group;

R3 represents:

• a cyclohexyl group, a 1 -{[(phenylsulfonyl)amino]methyl}cyclohexyl group or a 1-{[(phenylsulfonyl)amino]methyl}cyclopentyl group,

• a 5,6,7,8-tetrahydroquinolin-5-yl group,

• or a linear or branched group C-i-4-alkyl, which is unsubstituted or substituted with a group chosen from:

-NH-Re,

• -NH-SO2-R7,

-NH-(C=0)-R ₈ ,

a 1 -morpholin-4-ylcyclopentyl group,

a tetrahydro-2H-pyranyl group, a tetrahydrofuranyl group or a morpholin-4-yl group,

• a phenyl group, which is unsubstituted or substituted with one or more groups chosen independently from a chlorine atom and a group -CF3, • a 1 H-pyrrolo[2,3-b]pyridinyl group, a 4-methyl-5, 6.7,8- tetrahydroquinazolin-2-yl group, a 6-methoxy-1 H-benzimidazol-2-yl group, a pyridinyl group, which is unsubstituted or substituted with a group -CF3 or with a morpholin-4-yl group,

• or alternatively with one or more methoxy groups;

or alternatively f¾ and R3, together with the nitrogen atom to which they are attached, constitute a -C3-6-heterocycloalkyl group chosen from: azetidine, morpholine, 4-[5-(trifluoromethyl)pyridin-2-yl]piperazine;

R ₄ independently represents a group chosen from:

• a hydroxyl group,

• a deuterium,

• a fluorine atom,

• a cyclopropyl group,

• a phenyl group, which is unsubstituted or substituted with one or more groups chosen independently from a fluorine atom, a methoxy group, a -CH2OH group and a -CHO group,

• a pyridyl group,

• a morpholinyl group, a tetrahydro-2H-pyranyl group,

• a methoxy group,

• a group -(C=O)-NH-R ₁₀ ,

• a group -NH-R11 ,

• a group -NH-(C=0)-R-| ₂ ,

• or a group - H(S02)- i 3;

R5 represents a pyridyl group;

R6 represents a quinolyl group, the said quinolyl group being unsubstituted or substituted with a chlorine atom;

Rj represents a -CF3 group, a phenyl, pyridyl, pyrazolyl, 1 H-pyrrolo[2,3-b]pyridyl or indolyl group, the said phenyl, pyridyl, pyrazolyl, 1 H-pyrrolo[2,3-b]pyridyl or indolyl groups being unsubstituted or substituted with one or more groups Ry;

RQ represents a pyrazinyl group, the said pyrazinyl group being unsubstituted or substituted with one or more groups ?; R-io represents a 1 ,8-naphthyridinyl group substituted with a methyl group;

- Ri i represents a tetrahydrothiophene-1 ,1 -dioxide, quinolyl, pyridyl or benzyl group, the said quinolyl, pyridyl or benzyl groups being unsubstituted or substituted with a chlorine atom, a hydroxyl group, a nitro group or a methyl group;

- Ri2 represents:

• a tert-butoxy group,

• a group -C-i-4-alkyl, which is unsubstituted or substituted with a group chosen from a group -NR14R15, pyridyl or pyrazolyl, the said pyridyl or pyrazolyl groups being unsubstituted or substituted with a methyl group,

· a pyrazinyl or pyridyl, which is unsubstituted or substituted with one or more groups chosen from a hydroxyl group and a methyl group;

- R-1 3 represents:

• a group -CF ₃ ,

• a phenyl group, which is unsubstituted or substituted with a nitro group, · or a pyridyl group, which is unsubstituted or substituted with a group -NR16 17;

- R-14, R-15, R-I 6 and R17 each independently represent:

• a hydrogen atom,

• a methyl group or an isopropyl group;

- Ry represents:

· a fluorine atom, a chlorine atom,

• a methoxy group,

• a group -CF ₃ ,

• a group -OCF3,

• a nitro group,

· a group -NH2,

• a group -NHCH3;

- R2' represents:

• a hydroxyl group,

• a methyl group;

in the form of bases or of acid-addition salts. According to the present invention, distinguished compounds are those of formula (I) in which:

- Y represents a hydrogen atom or a group -(O0)-NR2R3;

- Z represents:

· a hydrogen atom,

• a methyl group, an isopropyl group, a 2,2-dimethylpropyl group,

• a group CD ₃ ,

• a 2-fluoroethyl group,

• a cyclopropylmethyl group,

· a 2-phenylethyl group,

• a [(7-methyl-1 ,8-naphthyridin-2-yl)amino]-4-oxobutyl group,

• a 2-{[(2-nitrophenyl)sulfonyl]amino}ethyl group,

• a cyclopropyl group,

• a tetrahydro-2H-pyranyl group;

- Ri represents a hydrogen atom, an ethyl group, a 2,2,2-trifluoroethyl group or a methyl group;

R2 represents a hydrogen atom or a methyl group;

- R3 represents:

• a methyl group,

· a 2-{[(2,6-difluorophenyl)sulfonyl]amino}-1 ,1-dimethylethyl group,

• a 1 ,1-dimethyl-2-({[4-(trifluoromethyl)phenyl]sulfonyl}amino)et hyl group,

• a 2-{[(2-fluorophenyl)sulfonyl]amino}-1 ,1 -dimethylethyl group,

• a 1 ,1-dimethyl-2-({[2-(trifluoromethoxy)phenyl]sulfonyl}amino)e thyl group,

• a 1 ,1-dimethyl-2-({[4-(trifluoromethoxy)phenyl]sulfonyl}amino)e thyl group, · a 2-methyl-1 -[(phenylsulfonyl)amino]propan-2-yl group,

• a 2-methyl-1 -{[(5-nitro-1 H-pyrazol-4-yl)sulfonyl]amino}propan-2-yl group,

• a 2-methyl-1 -{[(trifluoromethyl)sulfonyl]amino}propan-2-yl group,

• a 2-methyl-1 -{[(2-nitrophenyl)sulfonyl]amino}propan-2-yl group,

• a 1-{[(5-hydroxypyrazin-2-yl)carbonyl]amino}-2-methylpropan-2- yl group, · a 1 ,1-dimethyl-2-morpholin-4-ylethyl group,

• a benzyl group,

• a 2-(4-pyridyl)ethyl group;

in the form of bases or of acid-addition salts. Among the compounds according to the invention, mention may be made especially of the compounds below:

• (2R,3S,4R,5R,7S,9S,10S,11 _! 12S,13R)-7-[(benzylcarbamoyl)oxy]-2-(1 - {[(2R.3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydr o-2H-pyran-2- yl]oxy}propan-2-yl)-10-{[(2S,3R,6R)-3-hydroxy- -(methoxyimino)-6-methyltetrahydro- 2H-pyran-2-yl]oxy}-3,5 _! 7,9,11 ,13-hexamethyl-6,14-dioxo-12-{[(2S,5S,7R)-2 _! 4,5- trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R _! 3S,4R _! 5R,7S,9S,10S _! 1 1 R,12S,13R)-7-[(benzylcarbamoyl)oxy]-2- (1 {[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydr o-2H-pyran-2- yljoxyJpropan^-y -I O-l S^R^RJ-S-hydroxy^- methoxyimino^e-methyltetrahydro- 2H-pyran-2-yl]oxy}-3 _I 5,7,9 _! 11 ,13-hexamethyl-6,14-dioxo-12-{[(2S,5R _! 7R)-2,4,5- trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S.4R,5R,7S,9S.10S,11 R,12S,13R)-12-{[(2S.7R)-4-cyclopropyl-2,5-dimethyl-1 ,4- oxazepan-7-yl]oxy}-2-(1 -{[(2R 3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6- methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)-10-{[(2S,3R, 6R)-3-hydroxy-4- (methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]oxy}-7-{[(1 -{[(5-hydroxypyrazin-2- yl)carbonyl]amino}-2-methylpropan-2-yl)carbamoyl]oxy}-3,5,7, 9,11 ,13-hexamethyl- 6,14-dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R _! 3S,4R _! 5R,7S _! 9S,10S,11 R,12S,13R)-7-[(benzylcarbamoyl)oxy]-12-{[(2S _! 5R,7R)-

2,5-dimethyl-1 ,4-oxazepan-7-yl]oxy}-2-(1 -{[(2R,3R _! 4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)- 10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3.5J,9,11 ,13- hexamethyl-6,14-dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S,10S,11 R _I 12S,13R)-2-(1-{[(2R _I 3R,4R,5R _! 6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)- 10-{[(2S,3R _I 6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3,5,7,9,11 ,13- hexamethyl-6,14-dioxo-7-({[2-(pyridin^ -yl)ethyl]carbamoyl}oxy)-12-{[(2S.5S,7R)-2,4,5- trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S.4R,5RJS,9S.10S,11 R,12S,13R)-7-[(benzylcarbamoyl)oxy]-12-{[(2S,7RH- cyciopropyl-2 _! 5-dimethyl-1 ,4-oxazepan-7-yl]oxy}-2-(1-{[(2R,3R _! 4R,5R,6R)-5-hydroxy- 3,4-dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2- yl)-10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3,5,7,9,11 ,13- hexamethyl-6,14-dioxooxacyclotetradecan-4-yl 3-methylbutanoate; (2R _! 3S,4R _! 5R,7S _! 9S, 10S,1 1 R,12S, 13R)-7-[(benzylcarbamoyl)oxy]-12-{[(2S _! 7R)-2 _! 5- dimethyl-4-( ² H ₃ )methyl-1 ,4-oxazepan-7-yl]oxy}-2-(1 -{[(2R.3R,4R _! 5R,6R)-5-hydroxy-

3,4-dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan -2-yl)-10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3,5,7,9,1 1 ,13- hexamethyl-6,14-dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

(2R _! 3S,4R,5R,7S,9S, 10S,1 1 R,12S _! 13R)-7-[(dimethylcarbamoyl)oxy]-2-(1 - {[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydr o-2H-pyran-2- yl]oxy}propan-2-yl)-10-{[(2S,3R,6R 3-hydroxy-4-(met oxyimino)-6-methyltetrahydro- 2H-pyran-2-yl]oxy}-3,5,7,9,1 1 ,13-hexamethyl-6,14-dioxo-12-{[(2S,5R,7R)-2,4 _l 5- trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

(2R,3S,4R _! 5R,7S,9S, 105,1 1 R,12S, 13R)-7-[(benzylcarbamoyl)oxy]-12-{[(2S _! 7R)-2,5- dimethyl-4-(2-{[(2-nitrophenyl)sulfonyl]amino}ethyl)-1 ,4-oxazepan-7-yl]oxy}-2-(1 - {[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydr o-2H-pyran-2- yl]oxy}propan-2-yl)-10-{[(2S,3R,6R)-3-hydroxy-4-(methoxyimin o)-6-methyltetrahydro- 2H-pyran-2-yl]oxy}-3,5,7,9,1 1 ,13-hexamethyl-6,14-dioxooxacyclotetradecan-4-yl 3- methylbutanoate;

(2R,3S,4R,5R,7S,9S, 10S,1 1 R,12S, 13R)-7-[(benzylcarbamoyl)oxy]-12-{[(2S,7R)-4-(2- fluoroethyl)-2,5-dimethyl-1 ,4-oxazepan-7-yl]oxy}-2-(1 -{[(2R,3R,4R,5R,6R)-5-hydroxy- 3,4-dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2- yl)-10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3,5,7,9,1 1 ,13- hexamethyl-6,14-dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

(2R,3S,4R,5RJS,9S, 10S,1 1 R,12S, 13R)-7-[(benzylcarbamoyl)oxy]-12-{[(2S,7R)-2,5- dimethyl-4-{4-[(7-methyl-1 ,8-naphthyridin-2-yl)amino]-4-oxobutyl}-1 ,4-oxazepan-7- yl]oxy}-2-(1 -{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahyd ro-2H- pyran-2-yl]oxy}propan-2-yl)-10-{[(2S,3R,6R)-3-hydroxy-4-(met hoxyimino)-6- methyltetrahydro-2H-pyran-2-yl]oxy}-3,5,7,9,1 1 ,13-hexamethyl-6,14- dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

(2R,3S,4R,5R,7S,9S, 10S,1 1 R,12S, 13R)-7-[(benzylcarbamoyl)oxy]-12-{[(2S,7R)-4- (2,2-dimethylpropyl)-2,5-dimethyl-1 ,4-oxazepan-7-yl]oxy}-2-(1 -{[(2R,3R,4R,5R,6R)-5- hydroxy-3,4-dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}p ropan-2-yl)-10- {[(2S,3R,6R)-3-hydroxy-4-(methoxyimino)-6-methyltetrahydro-2 H-pyran-2-yl]oxy}- 3,5.7.9,1 1 ,13-hexamethyl-6,14-dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

(2R,3S,4R,5R,7S,9S, 10S,1 1 R,12S, 13R)-12-{[(2S,7R)-2,5-dimethyl-4-(2-phenylethyl)- 1 ,4-oxazepan-7-yl]oxy}-2-(1 -{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6- methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)-10-{[(2S,3R, 6R)-3-hydroxy-4- (methoxyimino)-6-methyitetrahydro-2H-pyran-2-yl]oxy}-7-{[(1 -{[(5-hydroxypyrazin-2- yi)carbonyl]amino}-2-methylpropan-2-yl)carbamoyl]oxy}-3,5,7, 9,11 ,13-hexamethyl- 6,14-dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S.4R,5RJS,9S.10S,11 R,12S,13R)-2-(1-{[(2R,3R _! 4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)- 10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methylteirahydro-2H-pyran-2-yl]ox y}-3, 5,7,9,11 ,13- hexamethyl-7-{[(2-methyl-1-{[(5-nitro-1 H-pyrazol-4-yl)sulfonyl]amino}propan-2- yl)carbamoyl]oxy}-6,14-dioxo-12-{[(2S,7R)-2,4,5-trimethyl-1 ,4-oxazepan-7- yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S,10S,11 R,12S,13R)-7-hydroxy-2-(1-{[(2R,3R,4R,5R,6R)-5- hydroxy-3,4-dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}p ropan-2-yl)-10- {[(2S,3R,6R)-3-hydroxy-4-(methoxyimino)-6-methyltetrahydro-2 H-pyran-2-yl]oxy}- 3,5J,9,1 1 ,13-hexamethyl-6,14-dioxo-12-{[(2S,5R,7R)-2,4,5-trimethyl-1 ,4-oxazepan-7- yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S,10S,11 ,12S,13R)-2-(1-{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)- 10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3,5,7,9,11 ,13- hexamethyl-7-{[(2-methyl-1-{[(trifluoromethyl)sulfonyl]amino }propan-2- yl)carbamoyl]oxy}-6,14-dioxo-12-{[(2S,7R)-2,4,5-trimethyl-1 ,4-oxazepan-7- yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S,10S,11 R,12S,13R)-12-{[(2S,7R)-2,5-dimethyl-4-(2-phenylethyl)- 1 ,4-oxazepan-7-yl]oxy}-7-hydroxy-2-(1-{[(2R,3R,4R,5R,6R)-5-hy droxy-3,4-dimethoxy- 6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)-10-{[(2S,3 R,6R)-3-hydroxy-4- (methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]oxy}-3,5,7,9 ,11 ,13-hexamethyl-6,14- dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R _! 5R,7S _! 9S,10S,11 R _! 12S _! 13R)-2-(1-{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)- 10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3,5,7,9,11 ,13- hexamethyl-7-{[(2-methyl-1-{[(2-nitrophenyl)sulfonyl]amino}p ropan-2- yl)carbamoyl]oxy}-6,14-dioxo-12-{[(2S,5R,7R)-2,4,5-trimethyl -1 ,4-oxazepan-7- yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5RJS,9S,10S,11 ,12S,13R)-2-(1-{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)- 10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3,5J,9,11 ,13- hexamethyl-7-{[(2-methyl-1-{[(2-nitrophenyl)sulfonyl]amino}p ropan-2- yl)carbamoyl]oxy}-6,14-dioxo-12-{[(2S,5S,7R)-2,4,5-trimethyl -1 ,4-oxazepan-7- yi]oxy}oxacyclotetradecan-4-yi 3-methylbutanoate;

• (2R _! 3S,4R,5R,7S,9S,10S _! 1 1 R _! 12S,13R)-2-(1-{[(2R,3R,4R,5R,6R)-5-hydroxy-3 _! 4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)- 10-{[(2S,3R,6R)-3- hydroxy-4-(mGihoxyimino)-6-methylieirahydro-2H-pyran-2-yl]ox y}-3,5,7,9,11 ,13- hexamet yl-7-[({2-methyl-1-[(p enylsulfonyl)amino]propan-2-yl}carbamoyl)oxy]-6,14- dioxo-12-{[(2S,5S,7R)-2,4,5-trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R _! 3S,4R,5R,7S,9S,10S _I 11 R,12S,13R)-2-(1-{[(2R,3R,4R _! 5R _! 6R)-5-hydroxy-3,4- dimethoxy-6-methyitetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)- 10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3,5,7,9,11 ,13- hexamethyl-7 ({2-methyl-1-[(phenylsulfonyl)amino]propan-2-yl}carbamoyl)ox y]-6,14- dioxo-12-{[(2S,5R,7R)-2,4,5-trimeihyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S,10S,11 R,12S,13R)-7-[({1 ,1 -dimethyl-2- [(phenylsulfonyl)amino]ethyl}carbamoyl)oxy]-2-(2-{[(2R,3R,4R ,5R.6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}-1-methylethy l)-10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-12-{[(2S,7R)-4- isopropyl-2,5-dimethyl-1 ,4-oxazepan-7-yl]oxy}-3,5J,9,1 I J S-hexamethyl-e.H- dioxooxacyclotetradecan^-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S,10S,11 R,12S,13R)-12-{[(2S,5R,7R)-4-(cyclopropylmethyl)-2,5- dimethyl-1 ,4-oxazepan-7-yl]oxy}-7-[({1 ,1-dimethyl-2-

[(phenylsulfonyl)amino]ethyl}carbamoyl)oxy]-2-(2-{[(2R,3R ,4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}-1-methylethy l)-10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3,5,7,9,11 ,13- hexamethyl-6,14-dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R _! 5R,7S,9S,10S,11 R,12S,13R)-12-{[(2S,7R)-4-(cyclopropylmethyl)-2,5- dimethyl-1 ,4-oxazepan-7-yi]oxy}-7-[({1 ,1-dimethyl-2-[(phenylsulfonyl)amino]ethyl} carbamoyl)oxy]-2-(2-{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimetho xy-6- methyltetrahydro-2H-pyran-2-yl]oxy}-1-methylethyl)-10-{[(2S, 3R,6R)-3-hydroxy-4- (methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]oxy}-3,5,7,9 ,1 1 ,13-hexamethyl-6,14- dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5RJS,9S,10S,11 ,12S,13R)-7-[({1 ,1 -dimethyl-2-[(phenylsulfonyl)amino] ethyl}carbamoyl)oxy]-12-{[(2SJR)-2,5-dimethyl-4-(tetrahydro- 2H-pyran-4-yl)-1 ,4- oxazepan-7-yl]oxy}-2-(2-{[(2R,3R,4R,5R _! 6R)-5-hydroxy-3,4-dimethoxy-6- methy!tetrahydro-2H-pyran-2-yl]oxy}-1-methylethyl)-10-{[(2S, 3R,6R)-3-hydroxy-4- (meihoxyimino)-6-methylteirahydro-2H-pyran-2-yl]oxy}-3,5,7,9 ,11 ,13-hexamethyl-6,14- dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S,10S _! 11 R,12S,13R)-12-{[(2S _! 5S,7R)-4-(cyclopropylmethyl)-2,5- dimethyl-1 ,4-oxazepan-7-yl]oxy}-7-[({1 ,1-dimeihyl-2-[(phenylsulfonyl)arnino]ethyl} carbamoyl)oxy]-2-(2-{[(2R,3R,4R,5R _! 6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydro -2H-pyran-2-yl]oxy}-1-meihylethyl)-10-{[(2S,3R,6R)-3-hydroxy -4-(methoxyimino)-6- methyltetrahydro^H-pyran^-ylloxyi-S^J^J I JS-hexamethyl-e,^- dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S,10S _! 11 R _! 12S,13R)-7-[({1 ,1 -dimethyl-2- [(phenylsulfonyl)amino]ethyl}carbamoyl)oxy]-12-{[(2S,5R,7R)- 4-(2,2-dimethylpropyl)- 2,5-dimethyl-1 ,4-oxazepan-7-yl]oxy}-2-(2-{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}-1-methylethy l)-10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3,5,7,9,11 ,13- hexamethyl-6,14-dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R.3S.4R.5R,7S,9S.10S,11 R,12S,13R)-7-[({1.1 -dimethyl-2-

[(phenylsulfonyl)amino]ethyl}carbamoyl)oxy]-12-{[(2S,7R)- 4-(2,2-dimethylpropyl)-2,5- dimethyl-1 ,4-oxazepan-7-yl]oxy}-2-(2-{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6- methyltetrahydro-2H-pyran-2-yl]oxy}-1-methylethyl)-10-{[(2S, 3R _! 6R)-3-hydroxy-4- (methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]oxy}-3.5.7,9 ,11 .13-hexamethyl-6.14- dioxooxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S,10S,11 R,12S,13R)-7-{[(1 ,1 -dimethyl-2-morpholin-4- ylethyl)carbamoyl]oxy}-2-(2-{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4 -dimethoxy-6- methyltetrahydro-2H-pyran-2-yl]oxy}-1-methylethyl)-10-{[(2S, 3R,6R)-3-hydroxy-4- (methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]oxy}-3,5,7,9 ,11 ,13-hexamethyl-6,14- dioxo-12-{[(2S,7R)-2,4,5-trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3- methylbutanoate;

• (2R,3S,4R,5R,7S,9S,10S,11 R,12S,13R)-7-{[(2-{[(2,6-difluorophenyl)sulfonyl]amino}- 1 ,1 -dimethylethyl)carbamoyl]oxy}-2-(2-{[(2R,3R,4R,5R _! 6R)-5-hydroxy-3,4-dimethoxy- 6-methyltetrahydro-2H-pyran-2-yl]oxy}-1-methylethyl)-10-{[(2 S,3R,6R)-3-hydroxy-4- (methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]oxy}-3,5,7,9 ,11 ,13-hexamethyl-6,14- dioxo-12-{[(2S,7R)-2 _! 4 _! 5-trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3- methylbutanoate: • (2R,3S R,5RJS,9S 10S,1 1 ,12S, 13R)-7-({[1 , 1 -dimethyl-2-({[4-(trif1uoromethyl) phenyl]sulfonyl}arnino)ethyl]carbamoyl}oxy)-2-(2-{[(2R _! 3R _! 4R _! 5R _! 6R)-5-hydroxy-3 _! 4- dimethoxy-6-methylteirahydro-2H-pyran-2-yl]oxy}-1 -meihylethyl)-10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-meihyltetrahydro-2H-pyran-2-yl]ox y}-3,5,7,9,11 ,13- hexamethyl-6,14-dioxo-12-{[(2S,7R)-2,4,5-trimethyl-1 ,4-oxazepan-7-yl]oxy} oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R _! 3S,4R _! 5R,7S _! 9S, 10S,1 1 R _! 12S, 13R)-7-{[(2-{[(2-fluorophenyl)sulfonyl]amino}-1 ,1 - dimeihylethyl)carbamoyl]oxy}-2-(2-{[(2R _! 3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6- methyltetrahydro-2H-pyran-2-ylloxy}-1 -methylethyl)-10-{[(2S,3R,6R)-3-hydroxy-4- (mGthoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]oxy}-3.5.7,9 ,1 1 , 13-hexamethyl-6,14- dioxo-12-{[(2S,7R)-2 _! 4,5-trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3- methylbutanoate;

• (2R _! 3S,4R,5R,7S,9S, 10S _! 1 1 R _! 12S, 13R)-7-({[1 ,1 -dimethyl-2-({[2- (trifluoromethoxy)phenyl]sulfonyl}amino)ethyl]carbamoyl}oxy) -2-(2- { R^R^R^R^RJ-S-hydroxy-S^-dimethoxy-e-methylteirahydro^H-pyran ^-ylloxy}- 1 -methylethyl)-10-{[(2S,3R,6R)-3-hydroxy-4-(methoxyimino)-6-m ethyltetrahydro-2H- pyran-2-yl]oxy}-3, 5,7,9, 1 1 , 13-hexamethyl-6,14-dioxo-12-{[(2S,7R)-2,4,5-trimethyl-1 ,4- oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S, 10S,1 1 R,12S, 13R)-7-({[1 , 1 -dimethyl-2-({[4- (trifiuoromethoxy)phenyl]suifonyl}amino)ethyl]carbamoyl}oxy) -2-(2- {[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydr o-2H-pyran-2-yl]oxy}- 1 -methylethyl)-10-{[(2S,3R,6R)-3-hydroxy-4-(methoxyimino)-6-m ethyltetrahydrch2H^ pyran-2-yl]oxy}-3, 5,7,9, H . I S-hexamethyl-e.H-dioxo-^-i SJR^^.S-trimethyl-l ^- oxazepan-7-yi]oxy}oxacyciotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S, 105,1 1 R,12S, 13R)-7-[({1 , -dimethyi-2- [(phenylsuifonyl)amino]ethyl}carbamoyl)oxy]-2-(2-{[(2R,3R,4R ,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}-1 -methylethyl)-10-({(2S,3R,6R)-3- hydroxy-6-methyl-4-[(2,2,2-trifiuoroethoxy)imino]tetrahydro- 2H-pyran-2-yl}oxy)- 3,5,7,9,1 1 ,13-hexamethyl-6,14-dioxo-12-{[(2S,7R)-2,4,5-trimethyl-1 ,4-oxazepan-7- yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

• (2R,3S,4R,5R,7S,9S, 10S,1 1 R,12S, 13R)-7-[({1 , 1 -dimethyi-2-[(phenylsulfonyl)amino] ethyl}carbamoyl)oxy]-10-{[(2S,3R,6R)-4-(ethoxyimino)-3-hydro xy-6-methyltetrahydro- 2H-pyran-2-yl]oxy}-2-(2-{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dim ethoxy-6- methyltetrahydro-2H-pyran-2-yl]oxy}-1 -methylethyl)-3,5,7,9,1 1 ,13-hexamethyl-6,14- dioxo-12-{[(2S,5R,7R)-2,4,5-trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

in the form of bases or of acid-addition salts.

[PREPARATION]

[Nature of the strain]

The strain described in FR 2 126 108 deposited at the Northern Regional Research Laboratory (NRRL) under the number NRRL 3892 may be used.

The strain named Allokutzneria albata deposited at the Deutsche Sammlung Von Mikroorganismen und Zellkulturen GmbH (DSMZ) by the group Sanofi-Aventis (Sanofi Aventis Deutschland GmbH, Industriepark Hochst H831 , 65926 Frankfurt am Main) under the identification reference ST108942 may also be used.

[Fermentation and purification to isolate sequanamycin of formula (A)]

The fermentation and purification process described in FR 2 126 108 makes it possible to isolate sequanamycin of formula (A) from the strain Allokutzneria albata. This may be performed by application of the protocol below. This protocol is given as a non- limiting illustration: it may be adapted to other conditions.

Thus, the fermentation process described below was performed for 500 litres, but may be adapted for smaller or larger proportions.

The preculture medium (named "medium 5294") used is typically the following:

The pH of the medium before sterilization is 7.2. The main culture medium (named "medium 5254-SeqOT) used is typically the following:

The fermentation process is typically as follows:

1 vial from the Banque de Cellules de Travail (BCT)

I

Step 1 : Preculture 1

500 μΙ_ of BCT were placed in a 300 ml conical flask comprising twice 100 ml of medium

5294. The mixture was stirred for 96 hours at 28 C.

I

Step 2: Preculture 2

25 ml of the culture medium from step 1 were placed in 4 times 500 ml of medium 5294 in a 2-litre conical flask, and the mixture was then stirred for 72 hours at 28 C.

I

Step 3: Preculture 3

1.5 L of the culture medium from step 2 were placed in 30 litres of medium 5294 in a 42- litre bioreactor, and the mixture was then stirred and aerated for 24 hours at 28 C, without monitoring the pH.

i

Step 4 (main culturing):

30 kg of the culture medium from step 3 were placed in 500 litres of medium 5294-Seq1 in an 800-litre bioreactor, and the mixture was then stirred and aerated for 96+5 hours at

28 C, without monitoring the pH.

I

Harvesting The fermentation process described above was performed for 500 litres, but may be adapted for smaller or larger proportions. It was performed, for example, at a scale of 7000 litres as follows, using the same culture media:

Preculture 1 = 250 ml, inoculum: one vial of BCT.

Preculture 2 = 5 litres in flasks (2 * 2.5 litres), inoculum of 0.5% from preculture 1.

Preculture 3 = 400 litres of medium in a 600 litre bioreactor, seeding rate of 1.25% from preculture 2.

Main culture = 7000 litres of medium in a 10 000 litre bioreactor, seeding rate of 5.7% from preculture 3.

The fermentation process is followed by the purification process below (performed on the 500 litre fermentation broth described above).

Once the fermentation was complete, the fermentation broth was separated into culture supernatant and mycelium using a cylindrical seed grader. The separation led to about 440 litres of culture supernatant.

In separate batches, 100-120 litres of culture supernatant comprising, inter alia, the macrolide (sequanamycin (A)) were placed on a column filled with adsorption resin (glass column filled with styrene-divinyl benzene copolymer, inside diameter of 200, length of about 180 mm, flow rate of 250 ml/min). The resin was then washed with 30% 2-propanol.

The sequanamycin (A) was isolated by eluting the column with the following elution gradient: 30-70% B over 45 minutes, 70% B over 10 minutes, 100% B over 25 min; with A = H ₂ 0, B = 2-propanol, modifier: 1 vol% NH ₄ Ac 50 g/L adjusted to pH 7). The fractions comprising the sequanamycin (A) were combined and the 2-propanol was evaporated off. The pH of the solution obtained was adjusted to above 7.5 and the solution was then extracted twice with EtOAc. The organic phases were combined and the solvents were evaporated off. The oil obtained (about 10 g per 100 litres of culture supernatant) was purified on silica gel (column of 40 mm x 260 mm), the column being eluted with an n-heptane to 30/70 n-heptane/EtOAc gradient over 45 minutes, followed by 30/70 n-heptane/EtOAc maintained for about 40 minutes (with a flow of 100 ml/minute). The monitoring of the purification may be performed by thin-layer chromatography, eluting with EtOAc and revealing the sequanamycins (in the form of blue spots) with a reagent such as vanillin. According to the concentration of sequanamycin (A) in the individual 100 litre batches, about 2.5 to 3.5 g of sequanamycin (A) with a purity of 68-75% (determined by NMR) were obtained per batch. If a higher purity is required, the sequanamycin (A) obtained may be repurified by reverse-phase chromatography on a WatersAtlantis machine with a 50x100 mm, 5 μ column. An elution gradient of H2O (A) and acetonitrile (B) and 1 vol% NH ₄ Ac 50 g/L adjusted to pH 7 was used (40-60% B over 30 minutes, flow rate of 140 ml/min). The chromatography was monitored by a light-scattering electrical signal. The fractions comprising the sequanamycin (A) were combined and lyophilized after having evaporated off the acetonitrile. The sequanamycin (A) yield after this final purification step was 57%, with an 85% pure compound according to the NMR analyses.

The compounds of formula (I) according to the invention are prepared from sequanamycin of formula (A).

[Processes for preparing the compounds of formula (!) from sequanamycin of formula (A)] In the steps described below, the usual organic chemistry reactions may be followed, especially those described in "Comprehensive Organic Transformations: A Guide to Functional Group Preparations" by Richard C. Larock, published by John Wiley & Sons Inc. In the text hereinbelow, the term "protecting group PG" means a group that can, firstly, protect a reactive function such as a hydroxyl or an amine during the synthesis and, secondly, regenerate the intact reactive function at the end of the synthesis. Examples of protecting groups and also protection and deprotection methods are given in Protective Groups in Organic Synthesis, Greene et al., 4th Edition (John Wiley & Sons, Inc., New York), 2007.

In the text hereinbelow, the term "leaving group LG" means a group that can be readily cleaved from a molecule by breaking a heterolytic bond, with loss of an electron pair. This group may thus be readily replaced with another group, for example during a substitution reaction. Such leaving groups are, for example, halogens or an activated hydroxyl group such as a methanesulfonate, benzenesulfonate, p-toluenesulfonate, triflate, acetate, etc. Examples of leaving groups and also references for their preparation are given in Advanced Organic Chemistry, M.B. Smith and J. March. 6th Edition, Wiley Interscience, 2007, pp. 496-501 .

In accordance with the invention, the compounds of formula (I) in which Y represents a group -(C=0)-NR2R3 may be prepared according to the process characterized in that: a compound of formula (I), in which Y represents a hydrogen atom below:

and R1 and Z are as defined for the compounds of formula (I), is reacted with a compound of formula (I I) HN R2R3 in which R2 and R3 are as defined for the compounds of formula (I), in the presence of a carbonyl derivative and a base.

The introduction of a group Y representing a group -(C=0)-NR2R3 into the compounds of formula (I B) typically comprises the following four successive steps:

• a-1 ) protection of the hydroxyl functions of the compound of formula (I B),

• a-2) formation of a carbonyl intermediate from the hydroxyl function in position 7 of the macrocycle,

• a-3) reaction of the carbonyl intermediate with a compound of formula (II) HNR ₂ R ₃ ,

• a-4) deprotection of the hydroxyl functions.

In step a-1 ), the hydroxyl functions of the compound of formula (I B) are protected to form a compound of formula (III) below, the hydroxyl function in position 7 of the macrocycle (onto which the group Y will be introduced) remaining free:

in which:

• Ri and Z are as defined for the compounds of formula (I);

• PGi and PG2 independently represent a hydroxyl-function protecting group.

In step a-2), the hydroxy I function in position 7 of the macrocycle of the compound of formula (II

· Ri and Z are as defined for the compounds of formula (I);

• LG represents a leaving group;

• PGi and PG2 independently represent a hydroxyl-function protecting group. In step a-3), the carbonyl intermediate of formula (IV) is reacted with a compound of formula (II) HNR2R3 in which R2 and R3 are as defined for the compounds of formula (I).

Step a-3) is typically performed in a polar solvent, for instance dimethylformamide (DMF), generally for 10 to 48 hours and at room temperature.

In step a-4), the hydroxy I functions of the compound obtained in step a-3) are deprotected.

Step a-4) is typically performed according to the deprotection processes described in Protective Groups in Organic Chemistry, J.F.W. McOmie, Plenum Press, 1973 or in Greene's Protective Groups in Organic Synthesis, by Theodora W. Greene published by John Wiley & Sons Inc., 2006.

As regards step a-1 ), the hydroxyl functions of compound (IB) are protected, for example, with acetate functions. This protection reaction may be performed by placing the compound of formula (I B) in contact with acetic anhydride in the presence of a base, especially a nitrogenous base, for example pyridine, at room temperature, the hydroxyl function in position 7 of the macrocycle onto which the group Y will be introduced remaining free, to form a compound of formula (Il ia) below:

in which:

• R-i and Z are as defined for the compounds of formula (I).

In a first embodiment of step a-2), a compound of formula (I II) as defined above is reacted, for example, with 4-N,N-dimethylaminopyridine (DMAP) and trichloromethyl chloroformate, generally in the presence of a base, especially a nitrogenous base, for example pyridine, in an a polar aprotic solvent, for example dichloromethane, at a temperature between -20 C and room temperature and for a time of between 5 and 30 hours, to form two carbon l intermediates of formulae (IVa) and (IVp) below:

in which:

• Ri and Z are as defined for the compounds of formula (I);

* PGi and PG ₂ independently represent a hydroxyl-function protecting group;

or

in which:

• Ri and Z are as defined for the compounds of formula (I);

• PGi and PG2 independently represent a hydroxyl-function protecting group, for example an acetate function. In a second embodiment of step a-2), a compound of formula (III) is reacted, for example, with imidazole and diphosgene to form a carbonyl intermediate of formula (IVy) below:

in which:

• Ri and Z are as defined for the compounds of formula (I);

• PGi and PG2 independently represent a hydroxyl-f unction protecting group, for example an acetate function.

In a third embodiment of step a-2), a compound of formula (III) is reacted, for example, with diphosgene to form a carbonyl intermediate of formula (IV5) below:

in which: • Ri and Z are as defined for the compounds of formula (I);

• PGi and PG2 independently represent a hydroxyl-f unction protecting group, for example an acetate function.

In particular, steps a-1 ), a-2), a-3) and a -4) may be performed simultaneously or in reverse order. Thus, for example:

a'-1 ) the hydroxyl functions of the compound of formula (IB) are protected, and a carbonyl intermediate is formed from the hydroxyl function in position 7 of the macrocycle by microwave heating of the compound of formula (IB) with, for example, Ν,Ν'-carbonyldiimidazole, in a solvent, for instance cyclohexane, and at a temperature of between 80 C and 100 C to obtain a compound of formula:

in which Z and Ri are as defined for a compound of formula (I);

a -2) the hydroxyl functions are deprotected by placing the compound of formula (XX) in contact with an acid, for instance hydrochloric acid, in a solvent, for instance tetrahydrofuran, to obtain a compound of formula:

(XXI) in which Z and Ri are as defined for a compound of formula (I);

a'-3), the compound of formula (XXI) is reacted with a compound of formula (II) HNR2R3 in which R2 and R3 are as defined for the compounds of formula (I).

Step a -3) is typically performed in a polar solvent, for instance dimethylformamide (DMF), in the presence of a base, for instance 1 ,8-diazabicyclo[5.4.0]undec-7-ene, generally for 10 to 48 hours and at room temperature.

In accordance with the invention, the compounds of formula (I) in which Y represents a group -(C=0)-NR2R3 may also be prepared according to the process characterized in that:

in which: • R-| , F¾ and R3 are as defined for the compounds of formula (I ); is reacted with an oxidizing agent to obtain a compound of formula (VI ):

in which:

R-i , R2 and R3 are as defined for the compounds of formula (I );

b-2) the compound of formula (VI ) thus obtained is reacted with a compound of formula (VI I):

ZN H ₂ (VI I)

in which Z is as defined for compound (I ), in the presence of a reducing agent, to obtain the expected compound of formula (I).

In step b-1 ), the oxidation of the compound of formula (V) is performed via the action of an oxidizing agent, for instance sodium penodate, in a polar solvent, for instance MeOH, and at a temperature of between 0 and 10 C.

In step b-2), the reaction of the compound of formula (VI ) with a compound of formula (VI I) takes place in the presence of a reducing agent, for instance sodium cyanoborohydride, in a slightly acidic medium, in a solvent such as MeOH .

In accordance with the invention, the compounds of formula (I) in which Y represents a hydrogen atom may be prepared according to the process characterized in that: c-1 ) a compound of formula (VIII):

in which:

• Ri is as defined for the compounds of formula (I);

is reacted with an oxidizing agent to obtain a compound of formula (IX):

in which Ri is as defined for the compounds of formula (I); c-2) the compound of formula (IX) thus obtained is reacted with a compound of formula (VII):

ZNH ₂ (VII)

in which Z is as defined for compound (I), in the presence of a reducing agent, to obtain the expected compound of formula (I).

Steps c-1 ) and c-2) are performed under the same operating conditions as those described in steps b-1 ) and b-2) above. In accordance with the invention, the compounds of formula (I) in which Y represents a group -(C=0)-0-Ri8 may be prepared according to the process characterized in that:

a compou

(XXI)

in which Z and Ri are as defined for a compound of formula (I), is reacted with an alcohol of formula HO-R-is (XXII), in the presence of a base.

The reaction is performed in the presence of a mineral base, for instance potassium carbonate, at room temperature.

In particular, certain compounds of formula (I) may be prepared from other compounds of formula (I). Thus, for example, a compound of formula (I) in which Z = Me may be prepared from a compound of formula (I) in which Z = H , by reaction with formaldehyde in the presence of formic acid and in a solvent, for instance chloroform.

The compounds of formula (I) thus obtained may be subsequently separated from the reaction medium and purified according to standard methods, for example by crystallization or chromatography.

The compounds of formula (I) thus obtained are isolated in the form of the free base or of a salt, according to the standard techniques.

The compounds of formula (II) are commercial, known or prepared according to methods known to those skilled in the art. The compounds of formula (V) in which Y represents a group -(0=0)Ν[¾ί¾ are prepared by reacting a compound of formula (VIII):

in which Ri is as defined for the compounds of formula (I);

with a compound of formula (II) HNR2R3 in which R2 and R3 are as defined for the compounds of formula (I), in the presence of a carbonyl derivative, according to the four steps below:

• d-1 ) protection of the hydroxyl functions of the compound of formula (VIII),

• d-2) formation of an activated intermediate by activation of the hydroxyl function in position 7 of the macrocycle,

• d-3) reaction of the activated intermediate with a compound of formula (II)

• d-4) optional deprotection of the hydroxyl functions.

In step d-1 ), the hydroxyl functions of the compound of formula (VIII) are protected to form a compound of formula (X) below (the hydroxyl function in position 7 of the macrocycle onto which the group Y will be introduced remaining free): in which:

• Ri is as defined for the compounds of formula (I);

• PG-i , PG2, PG3 and PG ₄ independently represent a hydroxyl-function protecting group.

In step d-2), a carbonyl intermediate is formed from the hydroxyl function in position 7 of the macrocycle of the compound of formula (X), especially one or more of the carbonyl intermediates of formula (XI) below:

in which:

• Ri is as defined for the compounds of formula (I);

• LG represents a leaving group;

• PGi , PG2PG3 and PG4 independently represent a hydroxyl-function protecting group. In step d-3), the carbonyl intermediate obtained in step d-2) is reacted with a compound of formula (II) H N R2R3 in which R2 and R3 are as defined for the compounds of formula (I).

Step d-3) is typically performed in a polar solvent, for instance dimethylformamide

(DMF), generally for 10 to 48 hours and at room temperature.

In step d-4), the hydroxyl functions of the compound obtained in step d-3) are deprotected.

Step d-4) is typically performed according to the deprotection processes described in Protective Groups in Organic Chemistry, J.F.W. McOmie, Plenum Press, 1973 or in Greene's Protective Groups in Organic Synthesis, by Theodora W. Greene published by John Wiley & Sons Inc., 2006. In a first embodiment of step d-1 ), the hydroxyl functions of compound (VIII) are protected, for example, with acetate functions. This protection reaction may be performed by placing the compound of formula (VII I) in contact with acetic anhydride in the presence of a base, especially a nitrogenous base, for example pyridine, at a temperature typically ranging from room temperature to 160 C, the hydroxyl function in position 7 of the macrocycle onto which the group Y will be introduced remaining free, to form a compound of formula (Xa) below:

in which R-i is as defined for the compounds of formula (I). In a second embodiment, step d-1 ) typically comprises the following three successive steps d-1-1 ), d-1-2) and d-1 -3):

- step d-1-1 ) the hydroxyl functions of the compound of formula (VIII) are protected with acyl imidazole functions to form a compound of formula (XII) by placing compound (VIII) in contact with 1 .Γ-carbonyldiimidazole in an a polar aprotic solvent, for example toluene, for a time from 10 minutes to 3 hours and at a temperature between room temperature and 80 C:

in which Ri is as defined for the compounds of formula (I).

The tertiary alcohol of mycarose reacts with the acylimidazole of the secondary alcohol at a to form the carbonate.

- step d-1 -2) the hydroxyl functions are deprotected by placing the compound of formula (XII) in contact with an acid, generally hydrochloric acid, in a polar aprotic solvent, for example tetrahydrofuran (THF), typically at room temperature and for a time from 2 to 24 hours, for example, to form the compound of formula (XIII) below:

in which R is as defined for the compounds of formula (I).

- step d-1 -3) the secondary hydroxyl functions of the compound of formula (XIII) are protected with acetate functions by placing the said compound in contact with acetic anhydride in the presence of a base, especially a nitrogenous base, for example pyridine, typically at room temperature and for a time from 5 to 48 hours, for example:

in which Ri is as defined for the compounds of formula (I).

In a first embodiment of step d-2), a compound of formula (Xa) as defined above is reacted with 4-N,N-dimethylaminopyridine (DMAP) and trichloromethyl chloroformate, generally in the presence of a base, especially a nitrogenous base, for example pyridine, in an a polar aprotic solvent, for example dichloromethane, at a temperature between -20 C and 5 C for a time of between 30 minutes and 10 hours, and then at room temperature for a time of between 5 and 30 hours, to form two carbonyl intermediates of formulae (XI a) and (ΧΙβ) below:

in which R-i is as defined for the compounds of formula (I).

In a second embodiment of step d-2), the compound of formula (XIV) is reacted, for example, with DMAP and trichloromethyl chloroformate, generally in the presence of a base, especially a nitrogenous base, for example pyridine, to form two carbonyl intermediates of formulae (XV) and (XVI ) below:

and

in which Ri is as defined for the compounds of formula (I).

In a third embodiment of step d-2). a compound of formula (XIV) is reacted, for example, with 1 ,1 -carbonyldiimidazole to form a carbonyl intermediate of formula (XVII ) below:

(XVII) in which R is as defined for the compounds of formula (I).

In a fourth embodiment of step d-2), a compound of formula (XIV) is reacted, for example, with diphosgene to form a carbonyl intermediate of formula (XVIII) below:

in which R-i is as defined for the compounds of formula (I).

The compounds of formula (VII) are commercially available, known or prepared according to methods known to those skilled in the art, and may be in salt form, such as the hydrochloride.

The compounds of formula (VIII) are prepared by reacting the sequanamycins (A) with a compound of formula (XIX) H2NOR1 in which Ri is as defined for the compounds of formula (I), in the presence of a base, for instance tnethylamine, if necessary. The reaction is performed in a solvent, for instance methanol.

The compounds of formula (XIX) are commercially available, known or prepared according to methods known to those skilled in the art, and may be in salt form, such as the hydrochloride.

The compounds of formula (XXI I) are commercially available, known or prepared according to methods known to those skilled in the art.

According to another of its aspects, a subject of the present invention is also the compounds of formulae (V) and (VIII). These compounds are useful as intermediates for synthesizing the compounds of formula (I).

Thus, a subject of the invention is compounds of formula (V):

in which:

• R-i , F¾ and F¾ are as defined for the compounds of formula (I).

A subject of the invention is also compounds of formula (VII I):

(VII I)

in which:

• F?i is as defined for the compounds of formula (I).

[Examples of preparation of the compounds of formula (I) from sequanamycin of formula (A)]

The following Examples describe the preparation of certain compounds in accordance with the invention. These examples are not limiting and merely illustrate the present invention.

In the Preparations and in the Examples, the following abbreviations are used:

EtOAc: ethyl acetate

TLC: thin-layer chromatography

CHCI ₃ : chloroform

DCM: dichloromethane

DMF: N,N-dimethylformamide

TEA: triethylamine

Nal0 ₄ : sodium metaperiodate, sodium periodate

K ₂ C0 ₃ : potassium carbonate

MeOH: methanol

MgS0 ₄ : magnesium sulfate

NaBH ₃ CN: sodium cyanoborohydride

NaCI: sodium chloride

NaHC0 ₃ : sodium bicarbonate

Na ₂ S0 _4: sodium sulfate

NH ₄ CI: ammonium chloride

NH ₄ Ac: ammonium acetate

THF: tetrahydrofuran

RT: room temperature

MATERIALS AND METHODS

The progress of the synthetic reactions is monitored by TLC. The plates are made of glass and are coated with Merck 60 F ₂₅₄ silica gel. After elution, the plates are observed under ultraviolet light at 254 nm and then revealed by spraying with a 5M sulfuric acid/water solution followed by heating.

The microwave reactions were performed using a Biotage Initiator 8 EXP microwave machine. The products were purified, when necessary, on a Biotage SP-1 chromatograph or a Spot 2 chromatograph from Merck. The columns used are Merck 15-40 μηι silica columns (2.5 g to 400 g).

Analyses

Mass Spectrometry (MS):

Method a:

• The spectra were acquired on a Waters UPLC-SQD machine;

• Ionization: electrospray in positive and/or negative mode (ES+/-);

• Chromatographic conditions:

• Column: Acquity BEH C18 - 1.7 pm - 2.1 x 50 mm.

• Solvents: A: H ₂ 0 (0.1 % formic acid) B: CH ₃ CN (0.1 % formic acid),

• Column temperature: 50 C,

• Flow rate: 1 ml/min,

• Gradient (2 min): from 5% to 50% B over 0.8 min; 1 .2 min: 100% B; 1 .85 min:

100% B; 1 .95: 5% B.

Method b:

• The spectra were acquired on a Waters UPLC-SQD machine;

• Ionization: electrospray in positive and/or negative mode (ES+/-);

• Chromatographic conditions:

• Column: Acquity BEH C18 - 1.7 pm - 2.1 x 50 mm,

• Solvents: A: H ₂ 0 (0.1 % formic acid) B: CH ₃ CN (0.1 % formic acid),

• Column temperature: 50 C,

• Flow rate: 0.8 ml/min,

• Gradient (2.5 min): from 5% to 100% B over 1 .8 min; 2.40 min: 100% B; 2.45 min: 100% B; from 100% to 5% B over 0.05 min.

Method c:

• The spectra were acquired on a Waters ZQ machine;

• Ionization: electrospray in positive and/or negative mode (ES+/-);

• Chromatographic conditions:

• Column: XBridge C18- 2.5 μνη - 3 x 50 mm, • Solvents: A: H ₂ 0 (0.1 % formic acid) B: CH ₃ CN (0.1 % formic acid),

• Column temperature: 70 C,

• Flow rate: 0.9 ml/min,

• Gradient (7 min): from 5% to 100% B over 5.3 min; 5.5 min: 100% B; 6.3 min:

5% B.

Method d:

• The spectra were acquired on a Waters UPLC-SQD machine;

• Ionization: electrospray in positive and/or negative mode (ES+/-);

· Chromatographic conditions:

• Column: Acquity BEH C18 - 1.7 pm - 2.1 x 50 mm,

• Solvents: A: H ₂ 0 (0.1 % formic acid) B: CH ₃ CN (0.1 % formic acid),

• Column temperature: 50°C,

• Flow rate: 1 ml/min,

· Gradient (5 min): from 5% to 100% B over 4.2 min; 4.6 min: 100% B: 4.8 min:

5% B.

Method e:

• The spectra were acquired on a Waters ZQ machine;

· Ionization: electrospray in positive and/or negative mode (ES+/-);

• Chromatographic conditions:

• Xselect C18 column 3.5 pm - 3 x 50 mm,

• Solvents: A: H ₂ 0 (0.1 % formic acid) B: CH ₃ CN (0.1 % formic acid),

• Column temperature: 60°C,

· Flow rate: 1 ml/min,

• Gradient (7 min): from 10% to 100% B over 4.5 min; 4.85 min: 100% B; 6.5 min: 10% B.

Method f:

· The spectra were acquired on an Agilent 6110 or Shimadzu 2010 machine;

• Ionization: electrospray in positive and/or negative mode (ES+/-);

• Xtimate C18 column 2.1 X 30 mm, 3 μηι,

• Solvents: A: H ₂ 0 (4L) + TFA ( .5 mL) B: CH ₃ CN (4L) + TFA (0.75 ml_),

• Column temperature: 50°C, • Flow rate: 1.2 ml/min,

• Gradient (2 min): from 10% to 80% B over 0.9 min; 1 .5 min: 80% B; 1.51 min:

10% B; 2 min: 10% B. Method g:

• The spectra were acquired on a Shimadzu 2010 machine;

• Ionization: electrospray in positive and/or negative mode (ES+/-);

• Merck RP-18e 2 X 25 mm column,

• Solvents: A: H ₂ 0 (4L) + TFA (1.5 mL) B: CH ₃ CN (4L) + TFA (0.75 ml_), · Column temperature: 50 'C,

• Flow rate: 1.0 ml/min from 0 to 0.08 min; 1.5 ml from 0.08 to 1.50 min,

• Gradient (1 .50 min): from 0 to 0.08 min 5% B; from 5% to 95% B from 0.08 to 0.7 min; 1.10 min: 95% B; 1.11 : 5% B; 1 .5 min: 5% B. Method h:

• The spectra were acquired on an Agilent 6110 or Shimadzu 2010 machine;

• Ionization: electrospray in positive and/or negative mode (ES+/-);

• Xtimate C18 column 2.1 X 30 mm, 3 μηι,

• Solvents: A: H ₂ 0 (4L) + TFA (1.5 mL) B: CH ₃ CN (4L) + TFA (0.75 mL), · Column temperature: 50 C,

• Flow rate: 1.2 ml/min,

• Gradient (2 min): from 30% to 90% B over 0.9 min; 1 .5 min: 90% B; 1.51 min:

30% B; 2 min: 30% B. Method i:

• The spectra were acquired on an Agilent 6110 machine;

• Ionization: electrospray in positive and/or negative mode (ES+/-);

• Columns A: Durashell C18 2.1 X 30 mm, 3 μιτι; B: Xbrige RP18 2.1 X 50 mm, 5 pm,

· Solvents: A: H ₂ 0 (4L) + TFA (1.5 mL) B: CH ₃ CN (4L) + TFA (0.75 mL),

• Column temperature: 50 C,

• Flow rate: 1.2 ml/min,

• Gradient (2 min): from 10% to 80% B over 0.9 min; 1 .5 min: 80% B; 1.51 min:

10% B; 2 min: 10% B. 1H Nuclear magnetic resonance (NMR)

The 1 H NMR spectra were recorded on a Bruker Avance spectrometer (300 MHz, 400 MHz, 500 MHz or 600 MHz) in deuterated DMSO. The chemical shifts are expressed in units δ (ppm) using tetramethylsilane (TMS) as internal reference. For the interpretation of the spectra, the following abbreviations were used: s = singlet, d = doublet, t = triplet, q = quartet, quint = quintet, sext = sextet, dd = doubled doublet, ddd = doublet of doubled doublets, m = multiplet, ax. = axial, equat. = equatorial.

PREPARATION

Preparation of the intermediates for the examples described below: Preparation 1 :

(2R,3S,4R,5R,7S,9S _! 10S,11 R,12S,13R)-12-{[(2R,4R,5S,6S)-4,5-dihydroxy-4,6- dimethyltetrahydro-2H-pyran-2-yl]oxy}-7-hydroxy-2-(1 -{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)- 10-{[(2S,3R,6R)-3-hydroxy- 4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]oxy}-3,5,7 ,9,1 1 ,13-hexamethyl-6,14- dioxooxacyclotetradecan-4-yl 3-methylbutanoate.

12 g of sequanamycin (A) are placed in 175 ml of MeOH with stirring, and 5.3 ml of TEA, and 3 g of methylhydroxylamine hydrochloride are then added, in this order. The stirring is continued at RT for 20 hours and the MeOH is then evaporated off under vacuum. The crude reaction product is taken up in 150 ml of DCM and washed with 100 ml of water and then with 100 ml of saturated aqueous NaCI solution. The aqueous phases are extracted with 150 ml of DCM. The organic phases are combined, dried over MgS0 ₄ , filtered and concentrated under vacuum. 12.7 g of the product obtained are suspended in 70 ml of a petroleum ether (40-60 C)/isopropanol mixture (2/1 ). The mixture is heated to 70 C, the insoluble matter is filtered off while hot and the product is then left to precipitate out at RT over 20 hours. It is filtered off by suction and rinsed with 20 ml of a petroleum ether (40-60 C)/isopropanol mixture (2/1 ). The precipitate is dried under vacuum at 35 C to give 10.62 g of expected product.

MS: method c

Retention time Tr (min) = 4.87; [M+Na]+: m/z 1014; [M-H+HC0 ₂ H]-: m/z 1036. 1 H NMR spectrum (500 MHz, in ppm, DMSO-ds): 0.81 (d, J=6.8 Hz, 3 H); 0.93 to 1.01 (m, 15 H); 1.07 (d, J=7.0 Hz, 3 H); 1.09 to 1.13 (m, 9 H); 1.17 (d, J=6.0 Hz, 3 H);

1.18 (d. J=6.0 Hz, 3 H); 1 .24 (s, 3H); 1.44 (dd, J=10.8 and 14.4 Hz, 1 H); 1.68 to 1.76 (m. 2 H); 1 .81 (d, J=14.4 Hz, 1 H); 1.88 (dd, J=1 1.5 and 15.9 Hz, 1 H); 1.96 to 2.06 (m, 3 H); 2.07 to 2.20 (m, 4 H); 2.73 (quint, J=7.0 Hz, 1 H); 2.81 (t, J=9.0 Hz, 1 H); 2.89 to 2.97 (m, 2 H); 3.03 (ddd, J=2.5 and 7.3 and 9.5 Hz, 1 H); 3.18 (q, J =6.8 Hz, 1 H); 3.34 to 3.36 (m, 2 H); 3.37 (s, 3 H); 3.45 (s, 3 H); 3.52 (dq, J=6.2 and 9.4 Hz, 1 H); 3.60 (s, 1 H); 3.62 to 3.65 (m, 1 H); 3.66 (t, J=2.5 Hz, 1 H); 3.71 to 3.77 (m, 1 H); 3.78 (m, 1 H); 3.80 (s, 3 H); 3.81 to 3.84 (m, 1 H); 3.87 (m, 1 H); 4.39 to 4.46 (m, 3 H); 4.50 (s, 1 H); 4.72 (d, J = 8.3 Hz, 1 H); 4.78 (d, J=8.3 Hz, 1 H); 4.84 (d, J=7.3 Hz, 1 H); 4.87 (d. J=3.8 Hz, 1 H);

5.19 (d, J=4.4 Hz, 1 H).

Preparation 2: benzyl carbamate

(2R,3S,4R,5R,7S,9S,10S,11 R,12S,13R)-7-[(benzylcarbamoyl)oxy]-12-

{[(2R,4R,5S,6S)-4,5-dihydroxy-4,6-dimethyltetrahydro-2H-p yran-2-yl]oxy}-2-(1 - {[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydr o-2/- -pyran-2- yl]oxy}propan-2-yl)-10-{[(2S,3R,6R)-3-hydroxy-4-(methoxyimin o)-6-methyltetrahydro-2H- pyran-2-yl]oxy}-3,5,7,9,1 1 ,13-hexamethyl-6,14-dioxooxacyclotetradecan-4-yl

3-methylbutanoate.

Preparation 2.1 :

8.6 g of the compound obtained in Preparation 1 are placed in 86 ml of pyridine, and 8.27 ml of acetic anhydride are added. The mixture is stirred for 24 hours at room temperature, and the pyridine is then concentrated under vacuum. 150 ml of DCM are added and the resulting mixture is washed with 120 ml of 1 N HCI solution and then with 100 ml of saturated aqueous NaCI solution. The aqueous phases are extracted with 150 ml of DCM. The organic phases are combined, dried over Na2S0 ₄ , filtered and then evaporated to dryness. 9.75 g of the expected product are obtained.

MS: method a

Retention time Tr (min) = 1 .27; [M+Na]+: m/z 1 140.

1 H NMR spectrum (400 MHz, in ppm, DMSO-d ₆ ): 0.81 (d, J=6.8 Hz, 3 H); 0.91 to 1.01 (m, 15 H); 1.02 (s, 3 H); 1.03 to 1.12 (m, 12 H); 1.21 (d. J=6.1 Hz, 3 H); 1.24 (s, 3 H); 1.50 (dd, J=10.5 and 14.5 Hz, 1 H); 1.72 to 1.94 (m, 6 H); 1.96 to 2.10 (m, 8 H); 2.12 to 2.18 (m, 3 H); 2.22 (s, 3 H); 2.77 (m, 1 H); 3.02 (dd, J=2.7 and 8.1 Hz, 1 H); 3.08 (m, 1 H);

3.16 (q, J=7.1 Hz, 1 H); 3.36 (m, 1 H); 3.39 (s, 3 H); 3.41 (s, 3H); 3.45 (m, 1 H); 3.63 to 3.72 (m, 2 H); 3.76 (broad s, 4 H); 3.80 (m, 1 H); 3.85 (t, J=2.7 Hz, 1 H); 4.1 1 (m, 1 H);

4.17 (s, 1 H); 4.35 (dd, J=2.7 and 10.3 Hz, 1 H); 4.42 (m, 2 H); 4.52 (d, J=8.1 Hz, 1 H); 4.63 (d, J=7.3 Hz, 1 H); 4.69 (d, J=9.0 Hz, 1 H); 4.75 (d, J=9.0 Hz, 1 H); 4.93 (d, J =

4.0 Hz, 1 H); 5.00 (d, J=7.3 Hz, 1 H). Preparation 2.2:

1 g of the compound obtained in Preparation 2.1 are placed in 20 ml of pyridine in a microwave reactor, and 1 ml of acetic anhydride and 50 mg of 4-dimethylaminopyridine are added. The solution is heated for 2 hours at 155 C by microwave. The reaction medium is poured into 50 ml of DCM and washed with 30 ml of 1 N HCI solution and then with 30 ml of water. The aqueous phases are extracted with twice 50 ml of DCM. The organic phases are combined, dried over Na ₂ S0 ₄ , filtered and then evaporated to dryness under vacuum. The residue, 1.1 g of a brown foam, is purified by chromatography on a Merck cartridge (50 g of 15-40 μιη silica), eluting with a 40/60 EtOAc/heptane mixture. 0.69 g of the expected compound is obtained.

MS: method a

Retention time Tr (min) = 1 .29; [M+Na]+: m/z 1 182.

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.81 (d, J=6.9 Hz, 3 H); 0.91 to

1.02 (m, 18 H); 1.06 (m, 6 H); 1.10 (d, J=6.9 Hz, 3 H); 1.19 to 1.26 (m, 6 H): 1.35 (s, 3 H); 1.44 (dd, J=10.5 and 14.5 Hz, 1 H); 1.79 (m, 1 H); 1.84 to 2.09 (m, 15 H): 2.1 1 to 2.18 (m, 6 H); 2.73 (m, 1 H): 3.02 (dd, J=2.7 and 7.8 Hz,1 H); 3.06 to 3.20 (m, 3 H); 3.35 to 3.42 (m, 8 H); 3.60 to 3.69 (m, 2 H); 3.77 (broad s, 4 H); 3.80 (m, 1 H); 3.85 (t, J=2.7 Hz, 1 H); 4.16 (m, 1 H); 4.36 (dd, J=2.7 and 9.9 Hz, 1 H); 4.48 to 4.53 (m, 3 H); 4.59 (d, J = 7.1 Hz, 1 H); 4.73 to 4.80 (m, 2 H); 4.87 (d, J=4.3 Hz, 1 H); 5.00 (d, J=7.1 Hz, 1 H). Pre aration 2.3:

3.5 g of the compound obtained in Preparation 2.2 dissolved in 140 ml of DCM and 3.6 ml of pyridine are placed under argon with stirring. The yellow solution obtained is cooled to -10 C, followed by rapid addition of trichloromethyl chloroformate (diphosgene), and stirring is continued at -10 C for 3 hours. 0.368 g of 4-dimethylaminopyridine dissolved in 10 ml of DCM is then added. The reaction medium is maintained at -5' C for a further 30 minutes and is then allowed to warm to room temperature, and stirring is continued for 20 hours. The solvent is evaporated off and 150 ml of EtOAc are added to the crude reaction product. The mixture is stirred for 15 minutes at room temperature and the precipitate formed is then filtered off. It is rinsed with 70 ml of EtOAc and the filtrate is evaporated to dryness under vacuum. 3.92 g of a mixture of the expected compounds (structures 2.3. a and 2.3. b) are obtained. The mixture is used as obtained for the following stage.

Preparation 2.4:

a) Condensation of the amine (benzylamine)

1 .5 g of the compound obtained in Preparation 2.3 are placed in 30 ml of DMF in a 100 ml round-bottomed flask, and 0.61 ml of benzylamine are then added. The mixture is stirred for 24 hours at room temperature, followed by addition of 100 g of ice and 100 ml of water. The precipitate formed is filtered off by suction and washed with a minimum amount of water. After drying in an oven under vacuum at 35 C, 1.18 g of the expected compound are obtained. b) Deprotection

1 .18 g of the compound obtained in the preceding step are placed in 20 ml of MeOH, and 0.63 g of K ₂ C0 ₃ is added. The heterogeneous medium is stirred at room temperature for 3 hours and then filtered through a No. 4 sinter funnel. The filtrate is taken up in 100 ml of EtOAc and washed with saturated aqueous NaCI solution. The organic phase is dried over MgS0 ₄ , filtered and then evaporated to dryness. 1 .05 g of crude compound are obtained, which product is purified by chromatography on a Merck column (30 g of 15-40 μιη silica) with a 30/70 to 60/40 EtOAc/heptane elution gradient. 0.466 g of the expected product is obtained.

MS: method c

Retention time Tr (min) = 5.21 ; [M+H]+: m/z 1 125; base peak: m/z 981 [M- H+HC0 ₂ H]-: m/z 1 169.

1 H NMR spectrum (500 MHz, in ppm, DMSO-de): 0.80 (d, J=6.8 Hz, 3 H);

0.92 (d, J=6.8 Hz, 3 H); 0.96 to 1 .02 (m, 9 H); 1 .05 (m, 6 H); 1.08 to 1 .15 (m, 9 H); 1 .18 (m, 6 H); 1 .67 to 2.18 (m, 10 H); 1.73 (s, 3 H); 2.18 (d, J=6.8 Hz, 2 H); 2.59 to 2.67 (m, 1 H); 2.80 (t, J=8.8 Hz, 1 H); 2.92 (dd, J=2.7 and 8.1 Hz, 1 H); 2.94 to 3.06 (m, 3 H); 3.27 to 3.35 (partially masked m, 1 H); 3.38 (s, 3 H); 3.41 (d, J=9.Q Hz, 1 H); 3.45 (s, 3 H); 3.49 to 3.56 (m, 1 H); 3.60 to 3.72 (m, 4 H ); 3.80 (s, 3 H ); 3.82 (m, 1 H); 3.87 (broad d, J=5.4 Hz, 1 H); 4.01 to 4.17 (m, 3 H); 4.34 to 4.39 (m, 2 H); 4.45 (d, J=7.8 Hz, 1 H); 4.50 to 4.57 (m, 2 H); 4.85 (d, J=7.3 Hz, 1 H); 4.93 (d, J=2A Hz, 1 H); 5.13 (broad s, 1 H); 7.18 to 7.36 (m, 6 H).

Preparation 3:

Preparation 3.1 :

1 1.1 g of the compound prepared in Preparation 1 are placed in 220 ml of toluene. 9.07 g of 1 ,1 '-carbonyldiimidazole are added and the reaction medium is then heated at 60°C for 45 minutes. It is allowed to cool to room temperature and the precipitate is filtered off and washed with toluene. The toluene phase is washed with 100 ml of water and then dried over MgS0 ₄ . After filtration, the solvent is evaporated off to dryness and 14.26 g of the expected product are recovered.

MS: method a

Retention time Tr (min) = 1.22; [M+H]+: m/z 1206; [M-H+HCOOH]-: m/z 1250.

1 H NMR spectrum (500 MHz, In ppm, DMSO-d _s ): 0.80 (d, J=6.8 Hz, 3 H);

0.83 (d, J=7.3 Hz, 3 H); 0.90 (d, J=6.8 Hz, 3 H); 0.98 (dt, J=3.2 and 6.4 Hz, 9 H); 1 .03 (d. J = 7.3 Hz, 3 H); 1.13 (d, J=6.8 Hz, 3 H); 1.16 (d, J=6.4 Hz, 3 H); 1.24 (t, J=2.9 Hz, 6 H);

1.29 (d, J=5.9 Hz, 3 H); 1.53 (m, 4 H); 1 .78 (m, 1 H); 1 .84 to 1.91 (m, 1 H); 1.98 (m, 1 H);

2.02 to 2.11 (m, 3 H); 2.16 (m, 3 H); 2.21 (m, 1 H); 2.34 (dd, J=5.9 and 14.2 Hz,1 H);

2.73 (dq, J=7.2 and 7.3 Hz, 1 H); 3.08 to 3.17 (m, 3 H); 3.38 (m, 1 H); 3.41 (s, 3 H);

3.44 (s, 3 H); 3.56 (d, J=5.9 Hz, 1 H); 3.66 to 3.74 (m, 5 H); 3.78 (ddd, J=2.9 and 6.0 and 1 1.6 Hz, 1 H); 3.96 (m, 1 H); 4.07 to 4.20 (m, 3 H); 4.39 (s, 1 H); 4.58 (m, 2 H); 4.63 (d,

J=9.3 Hz, 1 H); 4.76 (d, J=9.8 Hz, 1 H); 4.91 (s, 2 H); 5.22 (d, J=6.8 Hz, 1 H); 7.12 (d,

J=10.3 Hz, 2 H); 7.61 (d, J=1.5 Hz, 2 H); 8.29 (d, J=8.8 Hz, 2 H). Preparation 3.2:

14.01 g of the compound obtained in Preparation 3.1 are placed in 140 ml of THF,

34.8 ml of 1 N HCI solution are added and stirring is continued for 24 hours at room temperature. The reaction medium is poured into 200 ml of DCM and washed with 100 ml of water and then with 100 ml of saturated aqueous sodium bicarbonate solution. The aqueous phases are extracted with 200 ml of DCM, and the organic phases are combined, dried over Na ₂ S0 ₄ , filtered and then evaporated to dryness under vacuum. 1 1.48 g of the expected product are obtained.

MS: method a

Retention time Tr (min) = 1.19; [M+Na]+: m/z 1040; [M-H + HCOOH]-: m/z 1062. 1 H NMR spectrum (400 MHz, in ppm, DMSO-d ₆ ): 0.80 (d, J = 6.8 Hz, 3 H);

0.95 (m, 15 H); 1 .03 to 1 .17 (m, 12 H); 1.23 (s, 3 H); 1 .30 (d, J = 5.9 Hz, 3 H); 1.45 (m, 1 H); 1.52 (s, 3 H); 1.78 to 1.89 (m, 2 H); 1.90 to 2.24 (m, 8 H); 2.37 (dd, J = 5.1 and

13.9 Hz, 1 H); 2.79 (m, 2 H); 2.91 (m, 1 H); 3.03 (ddd, J = 2.7 and 6.8 and 9.5 Hz, 1 H); 3.13 (q, J = 6.7 Hz, 1 H); 3.32 (masked m, 1 H); 3.37 (s, 3 H); 3.45 (s, 3 H); 3.52 (m, 2 H); 3.63 to 3.72 (m, 3 H); 3.80 (s, 3 H); 3.92 (t, J = 3.9 Hz, 1 H); 4.00 (ddd, J = 3.2 and 6.1 and 1 1 .7 Hz, 1 H); 4.08 (m, 1 H); 4.15 (m, 1 H); 4.34 (s, 1 H); 4.45 (d, J = 8.1 Hz, 1 H); 4.63 (d, J = 9.8 Hz, 1 H); 4.68 (d, J=4.2 Hz, 1 H); 4.76 (d, J=9.5 Hz, 1 H); 4.83 (d, J = 7.1 Hz, 1 H); 4.98 (dd, J = 5.1 and 9.0 Hz, 1 H); 5.43 (d, J = 3.9 Hz, 1 H). Preparation 3.3:

1 1.4 g of the compound obtained in Preparation 3.2 are placed in 1 14 ml of pyridine, and 7.4 ml of acetic anhydride are then added. The reaction medium is stirred at room temperature for 24 hours. The pyridine is evaporated off under vacuum and 200 ml of DCM are added to the crude reaction mixture. The resulting mixture is washed with 150 ml of 1 N HCI solution and then with 150 ml of water. The aqueous phases are extracted with twice 200 ml of DCM, and the organic phases are combined, dried over Na ₂ S0 ₄ , filtered and then evaporated to dryness under vacuum. 12.2 g of compound are obtained, which product is purified by chromatography on a Merck column (400 g of 15- 40 pm silica), eluting with a 45/55 EtO Ac/heptane mixture. 8.6 g of the expected product are recovered.

MS: method a

Retention time Tr (min) = 1.29;

[M+H]+: m/z 1 102; [M-H+HCOOH]-: m/z 1146.

1 H NMR spectrum (400 MHz, in ppm, DMSO-d ₆ ): 0.81 (d, J=7.3 Hz, 3 H); 0.95 (m, 15 H); 1 .06 (m, 6 H); 1.11 (d, J=6.6 Hz, 3 H); 1.20 (d, J=6.1 Hz, 3 H); 1 .24 (s, 3 H); 1 .29 (d, J=3.9 Hz, 3 H); 1 .41 to 1.54 (m, 4H); 1 .77 to 1.91 (m, 2 H); 1.96 to 2.09 (m, 10 H); 2.1 1 to 2.23 (m, 4 H); 2.36 (m, 1 H); 2.79 (m, 1 H); 3.02 (m, 2 H); 3.13 (m, 1 H); 3.35 (m, 1 H); 3.38 (s, 3 H); 3.41 (s, 3 H); 3.52 (d, J=7.1 Hz, 1 H); 3.64 to 3.73 (m, 2 H); 3.74 to 3.83 (m, 5 H); 3.86 (broad s, 1 H); 4.06 to 4.14 (m, 2 H); 4.33 to 4.40 (m, 2 H); 4.52 (d, J=8.1 Hz, 1 H); 4.65 (d, J=9.8 Hz, 1 H); 4.76 (m, 2 H); 4.97 (dd, J=5.3 and 8.9 Hz, 1 H); 5.02 (d, J=6.1 Hz, 1 H).

(3.4.a) (3.4.b)

4 g of the compound obtained in Preparation 3.3 are placed, under argon, in 190 ml of DCM, and 4.12 ml of pyridine are added. The solution is cooled to -20 C, followed by addition, in a single portion, of 0.8 ml diphosgene, and stirring is continued at -20 C for 3 hours. 0.443 g of 4-dimethylaminopyridine is added, while still at -20 C. the mixture is then allowed to warm to room temperature and stirring is continued for 20 hours. The DCM is evaporated off under vacuum and the crude reaction product is taken up in 150 ml of EtOAc and stirred for 1 hour at room temperature. The precipitate formed is filtered off and rinsed with 80 ml of EtOAc. The filtrate is evaporated to dryness under vacuum, 4.7 g of the expected compounds (structures 3.4.a and 3.4.b) are obtained as a mixture, and the mixture is used as obtained for the following stage.

MS: method a

Retention time 3.4.a: Tr (min) = 1.1 [M+H]+: 1251 : 3.4.b: Tr (min) = 1.3 [M+Na]+:

1 187.

Preparation 3.5:

(3,5) a) Condensation of the amine A.

0.64 g of the mixture of compounds obtained in Preparation 3.4 is dissolved in 16 ml of DMF, followed by addition of 401 mg of N-(2-amino-2-methylpropyl)-5-nitro-1 H- pyrazole-4-sulfonamide dihydrochloride (prepared according to the process described in international patent application WO 2009/29439 A1 ) and 374 μΙ of TEA. The mixture is stirred for 4 days at room temperature, and 75 ml of EtOAc are then added. The mixture is washed with 50 ml of water and then with 50 ml of saturated aqueous NaCI solution. The organic phase is dried over MgSCU. filtered and concentrated under reduced pressure. 0.7 g of compound is obtained, which product is purified by chromatography on a silica column (Merck, 30 g of 15-40 μιη silica), eluting with a 60/40 heptane/EtOAc mixture.

147 mg of the expected compound are obtained. b) Deprotection

140 mg of the compound obtained in the preceding step are placed in 3 ml of MeOH. 70 mg of K ₂ C0 ₃ are added to the solution obtained. The mixture is stirred for 24 hours at room temperature. 15 ml of EtOAc are then added. The mixture is washed with 10 ml of water and then with 10 ml of saturated aqueous NaCI solution. The organic phase is dried over MgS0 ₄ , filtered and then evaporated to dryness under vacuum. 0.114 g of the expected product is obtained.

MS: method b

ES ⁺ : m/z 1 137 (base peak)

1 H NMR spectrum (500 MHz, In ppm, DMSO-d ₆ ): 0.79 (d, J=6.8 Hz, 3 H); 0.93 (m, 9 H); 1.01 (d, J=6.8 Hz, 3 H); 1 .10 (m, 18 H); 1.17 (m, 9 H); 1 .64 (s, 3 H); 1.80 (m, 5 H); 1.99 (m, 4 H); 2.13 (m, 3 H); 2.65 (m.1 H); 2.82 (m, 2 H); 2.96 (m, 5 H); 3.30 (masked m, 1 H); 3.37 (s, 3 H); 3.40 (d, J =9.8 Hz, 1 H); 3.46 (s, 3H); 3.51 (m, 1 H); 3.60 (m, 2 H); 3.67 (m, 2 H); 3.78 (m, 1 H); 3.80 (s, 3 H); 3.85 (m, 1 H); 4.08 (broad s, 1 H); 4.36 (m, 2 H); 4.44 (d, J=8.3 Hz, 1 H); 4.56 (m, 2 H); 4.80 (d, J=6.4 Hz, 1 H); 4.99 (broad d, J=2.0 Hz, 1 H); 5.09 (d, J=3.9 Hz, 1 H); 6.33 (s, 1 H); 6.86 (m, 1 H); 8.07 (broad s, 1 H); 14.52 (m, 1 H). Preparation 4:

a) Condensation of the amine B

0.64 g of the mixture of compounds obtained in Preparation 3.4 is placed in 15 ml of DMF. 462 mg of N-(2-amino-2-propylmethyl)-2-nitrobenzenesulfonamide hydrochloride (prepared according to the process described in Tetrahedron Letters, 2009, vol. 50, 28, pp. 4050 - 4053) and then 249 μΙ of TEA are added to the solution obtained. The mixture is stirred for 3 days at room temperature, and 75 ml of EtOAc are then added. The mixture is washed with 50 ml of water and then with 50 ml of saturated aqueous NaCI solution. The organic phase is dried over MgSCU, filtered and concentrated under reduced pressure. 0.57 g of compound is obtained, which product is purified by chromatography on silica (30 g of 15-40 pm silica), eluting with a 55/45 heptane/EtOAc mixture.

0.25 g of the expected compound is obtained. b) Deprotection

0.24 g of the compound obtained in the preceding step is placed in 4 ml of MeOH. 1 19 mg of potassium carbonate are added to the solution obtained. The suspension is stirred at room temperature for 24 hours. 20 ml of EtOAc are added and the mixture is washed with 10 ml of water and then with 20 ml of saturated aqueous NaCI solution. The organic phase is dried over MgS0 ₄ , filtered and concentrated under reduced pressure. 0.197 g of the expected product is obtained.

MS: method b

ES ⁺ : m/z 1 147 (base peak)

1 H NMR spectrum (500 MHz, In ppm, DMSO-d ₆ ): 0.79 (d, J=6.8 Hz, 3 H); 0.90 to

0.95 (m, 9 H); 1.01 (d, J=6.8 Hz, 3 H); 1 .04 to 1.14 (m, 18 H); 1.15 to 1 .20 (m, 9 H); 1.64 (s, 3 H); 1.67 to 1.88 (m, 5 H); 1.92 to 2.05 (m, 4 H); 2.09 to 2.18 (m, 3 H); 2.65 (m, 1 H); 2.81 (t, J=9.0 Hz, 1 H); 2.89 to 3.12 (m, 6 H); 3.31 (partially masked m, 1 H); 3.37 (s, 3 H); 3.40 (d, J=9.5 Hz, 1 H); 3.45 (s, 3 H); 3.51 (m, 1 H); 3.59 to 3.63 (m, 2 H); 3.65 to 3.71 (m, 2 H); 3.78 (m, 1 H); 3.80 (s, 3 H); 3.85 (dd, J=4.7 and 6.5 Hz, 1 H); 4.07 (broad s, 1 H); 4.36 (d, J=6.5 Hz, 1 H); 4.38 (d, J=8.9 Hz, 1 H); 4.43 (d, J=7.9 Hz, 1 H); 4.52 to 4.61 (m, 2 H); 4.83 (d, J=7.1 Hz, 1 H); 4.99 (broad d, J=2.9 Hz, 1 H); 5.11 (broad d, J=4.7 Hz, 1 H); 6.32 (broad s, 1 H); 7.77 to 8.05 (m, 5 H).

Preparation 5:

400 mg of sequanamycin (A), 180 mg of (R)-5-((4-((aminooxy)methyl)-1 H-1 ,2,3- triazol-1 -yl)rnethyl)-3-(3-fluorophenyl)oxazolidin-2-one (prepared according to the process described in Journal of Carbohydrate Chemistry, 2006, vol. 25, pp. 407 - 425) and 10 ml of MeOH are added. The solution obtained is stirred for 5 hours at room temperature. 20 ml of DCM are added. The mixture is washed with 20 ml of 1 M HCI and then with 20 ml of water. The organic phase is dried over MgS0 ₄ , filtered through a sinter funnel and then evaporated to dryness. The product is purified by chromatography on a column of silica (Merck, 15-40 μηη, 20 g), eluting with a 95/5 DCM/MeOH mixture. 205 mg of the expected compound are recovered.

MS: method b

ES-: [M-H+HC02H]-: m/z 1296.

1 H NMR spectrum (400 MHz, in ppm, DMSO-d ₆ ): 0.81 (d, J=6.8 Hz, 3 H);

0.96 (d, J=6.4 Hz, 9 H); 1.00 (m, 6 H); 1.07 (d, J-7.3 Hz, 3 H); 1.08 to 1.13 (m, 9 H);

1.17 (m, 6 H); 1.24 (s, 3 H); 1.46 (m, 1 H); 1.69 to 1.75 (m, 2 H); 1.79 to 1.91 (m, 2 H);

1.95 to 2.20 (m, 7 H); 2.73 (m, 1 H); 2.81 (m, 1 H); 2.89 to 2.97 (m, 2 H); 3.03 (m, 1 H);

3.19 (broad q, J=6.8 Hz, 1 H); 3.27 to 3.38 (partially masked m, 2 H); 3.37 (s, 3 H); 3.45 (s, 3 H); 3.52 (m, 1 H); 3.60 (broad s, 1 H); 3.62 to 3.68 (m, 2 H); 3.72 (m, 1 H);

3.76 to 3.85 (m, 2 H); 3.86 to 3.94 (m, 2 H); 4.26 (t, J=9.3 Hz, 1 H); 4.38 to 4.46 (m, 3 H);

4.50 (s, 1 H); 4.72 (d, J=8.3 Hz, 1 H); 4.78 (d, J=8.6 Hz, 1 H); 4.82 (m, 3 H); 4.89 (broad d, J=3.8 Hz, 1 H); 5.10 (s, 2 H); 5.12 to 5.20 (m, 2 H); 6.97 (dt, J=2.2 and 8.4 Hz, 1 H);

7.27 (broad d, J =8.4 Hz, 1 H); 7.37 to 7.51 (m, 2 H); 8.22 (s, 1 H). EXAMPLE 1 : Compound 1

Compound 1 -a: (2R,3S,4R,5R,7S,9S,10S,1 1 R,12S,13R)-7-hydroxy-2-(1 - {[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydr o-2H-pyran-2- yl]oxy}propan-2-yl)-10-{[(2S,3R,6R)-3-hydroxy-4-(methoxyimin o)-6-methylteirahydro-2/- - pyran^-yOoxyj-S^J.g.H .I S-hexamelhyl-e.M-dioxo-^-^S^RJ ^^^-trimethyl-l ^- oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate.

Compound 1 -b: (2R,3S,4R,5R,7S,9S,10S,1 1 R,12S,13R)-7-hydroxy-2-(1 - {[(2R,3R _! 4R,5R _! 6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydro-2H-pyra n-2- yl]oxy}propan-2-yl)-10-{[(2S,3R,6R)-34iydroxy-4-(methoxyimin o)-6-methyltetrahydro-2H- pyran-2-yl]oxy}-3,5,7,9,1 1 ,13-hexamethyl-6,14-dioxo-12-[[(2S,5S,7R)-2,4,5-trimethyl-1 ,4- oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate.

3 g of the compound of Preparation 1 are placed in 68 ml of MeOH. The reaction medium is cooled in an ice bath to a temperature of +4°C, followed by dropwise addition of a solution of 3.23 g of sodium periodate in 68 ml of water. The mixture is stirred for 6 hours at room temperature.

The medium is saturated with NaCI and filtered, and the filtrate is extracted with

DCM (3x200 ml). The organic phases are combined, washed with saturated aqueous NaCI solution, dried over MgSC , filtered and finally concentrated under reduced pressure. The oily residue obtained is dissolved, under argon, in 680 ml of MeOH. The pH is adjusted to 7 by addition of acetic acid, followed by addition of 2 M methylamine disolved in 12.1 ml of THF. The pH is maintained at 7 with acetic acid. After stirring for 30 minutes at room temperature, 0.95 g of NaBH ₃ CN is added in a single portion, and the mixture is stirred for a further 16 hours at room temperature. The reaction medium is filtered and rinsed with MeOH. The filtrate is concentrated under reduced pressure and then taken up in 600 ml of DCM. The resulting mixture is washed with saturated aqueous NaCI solution (3 * 60 ml). The organic phase is dried over MgS0 ₄ , filtered and then evaporated to dryness under vacuum. 3.5 g of product are purified by chromatography on a Merck cartridge (150 g of 15-40 μιτι silica) with a 100/0 to 90/10 DCM/MeOH elution gradient. 530 mg of diastereoisomer 1 -a, 380 mg of diastereoisomer 1 -b and 661 mg of a mixture of the two isomers are obtained. Compound 1 -a:

MS: method b

Retention time Tr (min) = 1.26; [M+H]+: m/z 989; [M-H+HC0 ₂ H]-: m/z 1033 (base peak).

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.79 (d, J=6.8 Hz, 3 H); 0.89 to 1.01 (m, 15 H);1.03 (d, J=6.8 Hz, 3 H); 1.05 to 1.10 (m, 9 H); 1.1 1 (d, J=6.1 Hz, 3 H); 1.13 (d, J=6.1 Hz, 3 H); 1.24 (s, 3H); 1.48 (dd, J=1 1 .4 and 14.7 Hz, 1 H); 1.70 to 2.08 (m, 8 H); 2.10 to 2.22 (m, 3 H); 2.18 (broad s, 3 H); 2.36 (m, 1 H); 2.57 (m, 1 H); 2.70 (d, J=13.6 Hz, 1 H); 2.75 (m, 1 H); 2.83 (dd, J=2.9 and 16.6 Hz, 1 H);2.92 (dd, J=2.7 and 8.0 Hz, 1 H); 3.03 (m, 1 H); 3.12 (q, J=6.8 Hz, 1 H); 3.30 (partially masked m, 1 H); 3.38 (s, 3 H); 3.45 (s, 3 H); 3.52 (m, 1 H); 3.58 to 3.72 (m, 4 H); 3.80 (s, 3 H); 3.89 (m, 2 H); 4.26 (m, 1 H); 4.31 (s, 1 H); 4.45 (d, J=8.0 Hz, 1 H); 4.65 (broad d, J=9.8 Hz, 1 H); 4.70 (d, J=4.6 Hz, 1 H); 4.74 (d, J=9.6 Hz, 1 H); 4.86 (d, J=7.1 Hz, 1 H); 4.93 (dd, J=3.1 and 9.5 Hz, 1 H); 5.33 (d, J=4.6 Hz, 1 H). Compound 1 -b:

MS: method b

Retention time Tr (min) = 1.26: [M-H+HC0 ₂ H] ^" : m/z 1033 (base peak).

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.82 (d, J=6.8 Hz, 3 H);

0.91 to 1 .32 (m, 36 H); 1 .44 to 1.51 (m, 1 H); 1.80 to 1.87 (m, 1 H); 1 .96 to 2.37 (m, 10 H); 2.76 to 2.80 (m, 2 H); 2.77 (s, 3 H); 2.85 (dd, J=3.1 and 16.8 Hz, 1 H); 2.93 (dd, J=2.7 and 8.0 Hz, 1 H); 3.00 to 3.07 (m, 2 H); 3.12 to 3.18 (m, 1 H); 3.28 (d, J=13.7 Hz, 1 H); 3.31 to 3.36 (m, 1 H); 3.40 (s, 3 H); 3.48 (s, 3 H); 3.51 to 3.58 (m, 2 H); 3.64 to 3.70 (m, 2H); 3.82 (s, 3 H); 3.86 to 3.90 (m, 1 H); 3.94 to 4.02 (m, 2 H); 4.31 to 4.37 (m, 1 H); 4.47 (d, J=7.9 Hz, 1 H);4.66 to 4.77 (m, 3 H); 5.12 (dd, J=5.8 and 8.9 Hz, 1 H).

EXAMPLE 2: Compound 2

(2R,3S,4R,5R,7S,9S,10S,11 R,12S,13R)-2-(1-{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)- 10-{[(2S,3R,6R)-3-hydroxy- 4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]oxy}-3,5,7 ,9,1 1 ,13-hexamethyl-6,14- dioxo-7-({[2-(pyridin-4-y!)ethyl]carbamoyl}oxy)-12-{[(2S,5S, 7R)-2,4,5-trimethyl-1 ,4- oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate;

660 mg of the mixture of diastereoisomers prepared in Example 1 are placed in 14.7 ml of pyridine. 631 μΙ of acetic anhydride are added. After stirring for 24 hours at room temperature, 189 μΙ of acetic anhydride are added and stirring is continued at room temperature for 24 hours. The solution is concentrated under vacuum and the residue is taken up in 200 ml of DCM. The resulting mixture is washed with 1 N HCI solution (3 * 5 ml) and then with saturated aqueous sodium bicarbonate solution (2 * 5 ml) and finally with saturated aqueous NaCI solution (3 * 5 ml). The organic phase is dried over MgS0 ₄ , filtered and then evaporated to dryness under vacuum. 756 mg of crude product are obtained, which product is purified by chromatography on a Merck cartridge (15-40 pm silica) with a 100/0 to 95/5 DCM/MeOH elution gradient. 287 mg of diastereoisomer 2.1. a and 266 mg of diastereoisomer 2.1.b are obtained.

Compound 2.1. a:

MS: method b

Retention time Tr (min) = 1.46; [M+H] ⁺ : 1073

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.79 (s, 3 H); 0.91 (m, 6 H); 0.97 (m, 9 H); 1.02 (d, J=6.6 Hz, 3 H); 1.07 (m, 12 H); 1.19 (d, J=6.1 Hz, 3 H); 1 .24 (s, 3 H); 1.49 (dd, J=11.7 and 14.5 Hz, 1 H); 1.82 (m, 4 H); 1.98 (m, 4 H); 2.05 (s, 3 H); 2.08 (s, 3 H); 2.16 (m, 3 H); 2.20 (s, 3 H); 2.44 (dd, J=9.9 and 14.4 Hz, 1 H); 2.64 (m, 1 H); 2.74 (m, 2 H); 3.03 (m, 2 H); 3.12 (q, J=6.7 Hz, 1 H); 3.35 (dd, J=4.9 and 10.1 Hz, 1 H); 3.39 (s, 3 H); 3.41 (s, 3 H); 3.55 (d, J=8.0 Hz, 1 H); 3.67 (m, 2 H); 3.79 (m, 2 H); 3.78 (s, 3 H); 3.86 (t, J=2.7 Hz, 1 H); 4.14 (m, 1 H); 4.31 (s, 1 H); 4.37 (dd, J=2.5 and 9.9 Hz, 1 H); 4.52 (d. J=8.0 Hz, 1 H); 4.65 (d, J=9.8 Hz, 1 H); 4.76 (d, J=9.5 Hz, 1 H); 4.79 (d, J=6.8 Hz, 1 H); 4.88 (dd, J=3.4 and 8.6 Hz, 1 H); 5.01 (d, J=6.8 Hz, 1 H).

Compound 2.1.b:

MS: method b

Retention time Tr (min) = 1.46; [M+Hf: 1073

1 H NMR spectrum (500 MHz, in ppm, in DMSO-d ₆ + TFA + AcOD) : 0.82 (d, J=6.8 Hz, 3 H); 0.95 (m, 15 H); 1.06 (m, 9 H); 1 .20 (m, 6 H); 1.25 (s, 3 H); 1.30 (d, J=6.9 Hz, 3 H); 1.48 (m, 1 H); 1 .84 (m, 1 H); 1 .94 to 2.36 (m, 10 H); 2.08 (s, 6 H); 2.75 (m, 1 H); 2.76 (s, 3 H); 3.06 (m, 3 H); 3.15 (q, J=6.5 Hz, 1 H); 3.20 (d, J=13.7 Hz, 1 H); 3.37 (dd, J=4.7 and 9.7 Hz, 1 H); 3.40 (s, 3 H); 3.43 (s, 3 H); 3.54 (m, 1 H); 3.60 (m, 1 H); 3.68 to 3.77 (m, 2 H); 3.81 (m, 1 H); 3.79 (s, 3 H); 3.87 (t, J=2.4 Hz, 1 H); 3.91 (m, 1 H); 4.26 (m, 1 H); 4.38 (dd, J=2.4 and 9.9 Hz, 1 H); 4.54 (d, J=8.0 Hz, 1 H); 4.67 (d, J=9.5 Hz, 1 H); 4.72 (m, 2 H); 5.04 (d, J=6.6 Hz, 1 H); 5.09 (dd, J=5.1 and 8.9 Hz, 1 H).

Step 2.2:

50 mg of diastereoisomer 2.1.b of the preceding step are placed, under argon, in 2 ml of DCM and 65 μΙ of pyridine. The colourless solution is cooled to -10 C. 10 μΙ of trichloromethyl chloroformate are then added, stirring is continued at -10 C for 3 hours, and 5.7 mg (46.67 μιτιοΙ) of 4-dimethylaminopyridine are then added. The mixture is allowed to warm to room temperature, and stirring is then continued for 20 hours. The resulting mixture is concentrated under vacuum, the residue is taken up in 5 ml of EtOAc and the insoluble matter is filtered off and rinsed with 2 ml of EtOAc. The filtrate is concentrated under vacuum. 55 mg of the compound obtained are dissolved in 2 ml of DMF. 53.4 mg of 4-(2-aminoethyl)pyridine are then added and the mixture is stirred for 48 hours at room temperature. The medium is poured onto an ice/water mixture. The resulting mixture is filtered by suction and the precipitate formed is then dried under vacuum. 34 mg of the expected product are obtained. MS: method b

Retention time Tr (min) = 1 .16 ES+: [M+2H]2+ m/z 61 1 (base peak); ES-: [M- H+HC0 ₂ H]-: m/z 1265 (base peak)

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.79 (d, J=6.9 Hz, 3 H ); 0.89 to 1 .1 1 (m, 30 H ); 1 .17 (m, 3 H ); 1 .64 to 2.18 (m, 12 H); 1 .67 (s, 3 H); 2.07 (s, 3 H); 2.08 (s, 3 H); 2.27 (s, 3 H); 2.44 (d, J=13.2 Hz, 1 H); 2.55 (masked m, 1 H); 2.70 (m, 3 H); 2.85 (m, 1 H); 3.02 (m, 5 H ); 3.35 (masked m, 1 H); 3.38 (s, 3H); 3.41 (s, 3 H); 3.67 (m, 3 H); 3.80 (m, 2 H); 3.78 (s, 3 H); 3.86 (s, 1 H); 4.14 (m, 1 H); 4.37 (dd, J=2.2 and 9.9 Hz, 1 H); 4.52 (d, J=8.0 Hz, 1 H); 4.57 (d, J=9.6 Hz, 1 H); 4.64 (d, J=9.3 Hz, 1 H); 4.75 (d, J=6.6 Hz, 1 H); 4.96 (m, 1 H); 5.01 (d, J=6.6 Hz, 1 H); 6.89 (broad t, J=5.4 Hz, 1 H); 7.18 to 7.23 (m, 2 H); 8.43 (d, J=5.5 Hz, 2 H)

Step 2.3:

32.5 mg of the product prepared in the preceding step are placed in 2 ml of MeOH with 1 1 mg of K ₂ C0 ₃ . After stirring for 1 hour 30 minutes at room temperature, 20 ml of EtOAc are added to the reaction medium. The resulting mixture is washed with 20 ml of saturated aqueous NaCI solution. After separation of the phases by settling, the organic phase is dried over MgS0 ₄ , filtered and then evaporated to dryness under vacuum. 24 mg of the expected compound are obtained.

MS: method b

Retention time Tr (min) = 0.97; [M+ ₂ H]2+: 569 (base peak); [M-H+HC0 ₂ H]-: m/z 1 H N R spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.78 (d. J=6.9 Hz, 3 H); 0.96 to 1.15 (m, 33 H); 1.64 to 1.87 (m, 6 H); 1.92 to 2.19 (m, 9 H); 2.25 (s, 3 H); 2.42 (d, J=13.4 Hz, 1 H); 2.55 (masked m, 1 H); 2.70 (m, 3 H); 2.85 (m, 2 H); 2.92 (dd, J=2.3 and 8.1 Hz. 1 H); 3.01 (m, 2 H); 3.12 (m, 2 H); 3.30 (masked m, 1 H); 3.37 (s, 3 H); 3.45 (s, 3 H); 3.52 (m, 1 H); 3.61 (m, 2 H); 3.68 (broad s, 1 H); 3.80 (m, 4 H); 3.97 (m, 2 H); 4.28 (m, 1 H); 4.44 (d, J=8.0 Hz, 1 H); 4.53 to 4.65 (m, 2 H); 4.69 (d, J=4.7 Hz, 1 H); 4.86 (d, J=7.1 Hz, 1 H); 4.99 (m, 1 H); 5.38 (d, J=4.7 Hz, 1 H); 6.89 (m, 1 H); 7.23 (d, J=5.2 Hz, 2 H); 8.43 (d, J=5.5 Hz, 2 H). EXAMPLE 3: Compound 3

(2R,3S,4R,5R,7S,9S,10S,11 R,12S,13R)-7-[(dimethylcarbamoyl)oxy]-2-(1- {[(2R,3R,4R,5R _! 6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydro-2H-pyra n-2- yl]oxy}propan-2-yl)-10-{[(2S,3R,6R)-3-hydroxy-4-(methoxyimin o)-6-methyltetrahydro-2H- pyran-2-yl]oxy}-3,5J,9,1 1 ,13-hexamethyl-6.14-dioxo-12-{[(2S,5R.7R)-2,4,5-trimethyl-1 ,4- oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate.

150 mg of compound 2.1. a obtained in step 2.1 of Example 2 are placed in 9 ml of DCM and 210 μΙ of pyridine in a 30 ml round-bottomed flask, under argon. The colourless solution is cooled to -10 C. 30 μΙ of trichloromethyl chloroformate are then added and stirring is continued for 3 hours at -10 C, followed by addition of 17 mg of 4-dimethylaminopyridine dissolved in 2 ml of DCM. The mixture is allowed to warm to room temperature, and stirring is continued for 20 hours. The resulting mixture is concentrated under vacuum, the residue is taken up in 4 ml of DMF, and dimethylamine hydrochloride (173 mg) dissolved in DMF (2 ml) and TEA (0.3 ml) is then added. The reaction medium is stirred for 3 hours at room temperature. The resulting mixture is poured into an ice/water mixture, and the precipitate formed is filtered off by suction. 146 mg of product are recovered, which product is purified by chromatography on a Merck cartridge (5 g of 15-40 μηι silica), eluting with a 95/5 DCM/MeOH mixture. 93 mg of the expected compound is obtained. MS: method b

Retention time Tr (min) = 1.33; [M+H] ⁺ : 1 144

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.79 (d, J=6.9 Hz, 3 H);

0.92 (m, 6 H); 0.96 (d, J=6.6Hz, 6 H); 1 .05 (m, 18 H); 1.17 to 1.19 (m, 3 H); 1.69 to 2.03 (m, 9 H); 1.71 (s, 3 H); 2.05 (s, 3 H); 2.08 (s, 3H); 2.13 (m, 3 H); 2.21 (s, 3 H); 2.44 to 2.49 (masked m, 1 H); 2.72 (m, 6 H); 2.84 (broad s, 3 H); 3.03 (m, 3H); 3.33 (masked, 1 H); 3.39 (s, 3 H); 3.42 (s, 3 H); 3.65 (m, 3 H); 3.77 (s, 3 H); 3.80 (m, 1 H); 3.86 (t.J=2.6 Hz, 1 H); 3.89 (d, J=4.3 Hz, 1 H); 4.10 (m, 1 H); 4.37 (dd, J=2.5 and 9.9 Hz, 1 H); 4.52 (d, J=8.0 Hz, 1 H); 4.59 (d, J=10.1 Hz, 1 H); 4.69 (d, J=9.6 Hz, 1 H); 4.73 (d, J=7.3 Hz, 1 H); 4.83 (dd, J=3.8 and 7.9 Hz, 1 H); 5.00 (d, J=7.3 Hz, 1 H).

Step 3.2:

90 mg of the product obtained in the preceding step are placed in 5.5 ml of MeOH, and 32.6 mg of K ₂ CO3. After stirring for 1 hour 30 minutes at room temperature, 50 ml of EtOAc are added to the reaction medium. The resulting mixture is washed with 20 ml of saturated aqueous NaCI solution. After separation of the phases by settling, the organic phase is dried over MgSC , filtered and then evaporated to dryness under vacuum. 50 mg of the expected compound is obtained.

MS: method b

Retention time Tr (min) = 1.12; [M+Hf: 1060.

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.78 (d, J=6.9 Hz, 3 H); 0.92 (m, 6 H); 0.96 (d, J=6.6 Hz, 6 H); 1.01 to 1 .14 (m, 21 H); 1.70 to 2.06 (m, 9 H); 1.71 (s, 3 H); 2.09 to 2.17 (m, 3 H); 2.19 (s, 3 H); 2.38 (dd, J=9.4 and 14.0 Hz, 1 H); 2.59 (m, 1 H); 2.79 (m, 9 H); 2.92 (dd, J=2.6 and 8.0 Hz, 1 H); 3.02 (m, 2 H); 3.30 (masked m, 1 H); 3.38 (s, 3 H); 3.46 (s, 3 H); 3.51 (m, 1 H); 3.63 (dd, J=4.4 and 9.6 Hz, 1 H); 3.67 (broad s, 1 H); 3.71 (d, J=6.9 Hz, 1 H); 3.77 (d, J=5.4 Hz, 1 H); 3.83 (m, 4 H); 3.89 (t, J=4.9 Hz, 1 H); 4.21 (m, 1 H); 4.45 (d, J=7.9 Hz, 1 H); 4.62 (m, 3 H); 4.88 (m, 2 H); 5.24 (d, J=4.6 Hz, 1 H).

EXAMPLE 4: Compound 4

(2R,3S,4R _! 5R,7S,9S,10S,11 R,12S,13R)-2-(1-{[(2R,3R _! 4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)- 10-{[(2S,3R,6R)-3-hydroxy- 4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]oxy}-3,5,7 ,9,1 1 ,13-hexamethyl-7- [(2- methyl-1 -{[(5-nitro-1 H-pyrazol-4-yl)sulfonyljamino}propan-2-yl)carbamoyl]oxy}-6,1 4-dioxo- 12-{[(2S _! 7R)-2,4,5-trimethyl- ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3- methyl

102 mg of the product obtained in Preparation 3 are placed in 2 ml of MeOH. The solution is cooled to 0 C, and a solution of 86 mg of sodium metaperiodate in water (2 ml) is added. The reaction mixture is stirred magnetically at room temperature for 5 hours. 15 ml of DCM are added and the mixture is washed with 10 ml of water and then with 10 ml of saturated aqueous NaCI solution. The organic phase is dried over MgS0 ₄ , filtered and concentrated under reduced pressure. 86 mg of product obtained are dissolved in MeOH (10 ml), the solution is cooled to 0 C and methylamine (84 μΙ of a 2M solution in THF) and then acetic acid (9.7 μΙ) are added. After stirring for 10 minutes at 0°C, 13.34 mg of NaBH ₃ CN are added. The reaction medium is stirred for 1 hour at 0 C and is then allowed to warm to room temperature, and stirring is continued for 20 hours. 20 ml of DCM are added and the mixture is washed with 15 ml of saturated aqueous NaHCC solution and then with 15 ml of saturated aqueous NaCI solution. The organic phase is dried over MgSO filtered and concentrated under reduced pressure. 0.12 g of product obtained is purified by preparative LC/MS, eluting with a 15/85 to 95/5 gradient of acetonitrile/water containing 0.1 % TFA. The fractions of mass 1278 to 1281 are recovered. The recovered phases are brought to pH 8 with saturated aqueous NaHC0 ₃ solution and then extracted with 50 ml of EtOAc. The organic phase is dried over MgS0 ₄ , filtered and then evaporated to dryness under vacuum. 38 mg of the expected product are obtained.

MS: method b

Retention time Tr (min) = 1.06: [M+Na] ⁺ : 1278

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 70/30 mixture of the diastereoisomers, 0.78 (d, J=6.8 Hz, 3 H); 0.91 (d, J=6.8 Hz, 3 H); 0.95 (m, 9 H); 1.02 to 1.16 (m, 27 H); 1.68 (broad s, 3 H); 1.71 to 1.90 (m, 4 H); 1.93 to 2.21 (m, 8 H); 2.36 (broad s, 2.1 H); 2.46 (broad s, 0.9 H); 2.61 (m, 1 H); 2.69 to 3.06 (m, 9 H); 3.30 (masked m, 1 H); 3.38 (s, 3 H); 3.46 (s, 3 H); 3.49 to 3.64 (m, 2.3 H); 3.67 (t, J=2.6 Hz, 1 H); 3.72 (m, 1 H); 3.78 to 3.91 (m, 2.7 H); 3.80 (s, 3 H); 4.30 (m, 1 H); 4.45 (d, J=7.9 Hz, 1 H); 4.57 to 4.67 (m, 3 H); 4.83 (d, J=6.8 Hz, 1 H); 4.96 (dd, J=3.0 and 9.2 Hz, 0.7 H); 5.04 (dd, J=4.8 and 8.6 Hz, 0.3 H); 5.26 (broad s, 0.7 H); 5.36 (broad s, 0.3 H); 6.32 (broad s, 1 H); 6.70 m, 1 H); 7.89 to 7.93 (m, 1 H).

EXAMPLE 5: Compound 5

Compound 5-a: (2R,3S,4R,5R,7S,9S.10S,1 1 R,12S,13R)-2-(1 - {[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydr o-2H-pyran-2- yl]oxy}propan-2-yl)-10-{[(2S,3R,6R)-3-hydroxy-4-(methoxyimin o)-6-methyltetrahydro-2H- pyran-2-yl]oxy}-3,5,7,9, 1 1 , 13-hexamethyl-7-{[(2-methyl-1 -{[(2- nitrophenyl)sulfonyl]amino}propan-2-yl)carbamoyl]oxy}-6,14-d ioxo-12-{[(2S,5R,7R)-2,4,5- trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate.

Compound 5-b: (2R,3S.4R.5R,7S.9S.10S,1 1 R.12S,13R)-2-(1 -

{[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrah ydro-2H-pyran-2- yl]oxy}propan-2-yl)-10-{[(2S,3R _! 6R)-3-hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H pyran-2-yl]oxy}-3,5,7,9, 1 1 , 13-hexamethyl-7-{[(2-methyl-1 -{[(2- nitrophenyl)suifonyl]amino}propan-2-yl)carbamoyl]oxy}-6,14-d ioxo-12-{[(2S _! 5S,7R)-2,4,5- trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate.

A solution of 99 mg of the product obtained in Preparation 4 in 2 ml of MeOH is cooled to 0 C. A solution of 83 mg of Nal0 ₄ in 2 ml of water is then added dropwise. After 15 minutes at 0°C, the mixture is allowed to warm to room temperature, and stirring is continued for 3 hours. The reaction medium is poured into 20 ml of DCM. The resulting mixture is washed with 10 ml of water, the phases are separated by settling and then washed again with 10 ml of saturated aqueous NaCI solution. The organic phase is dried over MgS0 ₄ , filtered and then evaporated to dryness. 1 10 μΙ of a 2M solution of methylamine in THF, 13.9 μΙ of AcOH and finally 16.67 mg of NaBH ₃ CN are added, in this order, to a solution of 95 mg of the compound thus obtained in 8 ml of MeOH. The mixture is stirred for 20 hours at room temperature. 20 ml of DCM are added and the resulting mixture is washed with saturated aqueous NaHCC»3 solution and then with aqueous NaCI solution. The aqueous phases are extracted with DCM. The organic phases are combined, dried over MgSC , filtered and then evaporated to dryness. The 85 mg of product obtained are combined with another batch of 68 mg prepared in a preceding reaction under the conditions described above. This mixture is purified by chromatography on silica (10 g of 15-40 pm silica) with a 94.5/5.5 DCM/MeOH elution solvent. 49 mg of diastereoisomer 5-a and 30 mg of isomer 5-b are obtained. Compound 5-a:

MS: method b

Retention time Tr (min) = 1.16; [M+Hf: 1288

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.78 (d, J=6.8 Hz, 3 H); 0.90 (d, J=6.8 Hz, 3 H); 0.92 to 0.97 (m, 9 H); 1 .00 to 1 .17 (m, 27 H); 1.62 to 1.70 (m, 4 H); 1.71 to 1.85 (m, 4 H); 1.89 to 2.08 (m, 4 H); 2.13 (s, 3 H); 2.19 (s, 3 H); 2.39 (dd, J=9.7 and 14.2 Hz, 1 H); 2.59 (m, 1 H); 2.74 (m, 2 H); 2.83 to 3.1 1 (m, 6 H); 3.28 (masked m. 1 H); 3.38 (s, 3 H); 3.46 (s, 3 H); 3.52 (quint, J=6.2 Hz, 1 H); 3.62 (dd, J=4.4 and

9.8 Hz, 1 H); 3.68 (m, 2 H); 3.76 (d, J=4.5 Hz, 1 H); 3.82 (m, 5 H); 4.26 (quint, J=7.2 Hz, 1 H); 4.45 (d, J=7.9 Hz, 1 H); 4.59 (d, J=9.9 Hz, 1 H); 4.68 (m, 2 H); 4.83 (d, J=7.1 Hz, 1 H); 4.91 (dd, J=2.8 and 9.2 Hz, 1 H); 5.23 (d, J=4.4 Hz, 1 H); 6.28 (s, 1 H); 7.91 (m, 5 H).

Compound 5-b:

MS: method b

Retention time Tr (min) = 1.16; [M+H] ⁺ : 1288

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.78 (d, J=6.8 Hz, 3 H); 0.90 (d, J=7.0 Hz, 3 H); 0.95 (d, J=6.7 Hz, 9 H); 1.00 (d, J=6.7 Hz, 3 H); 1.05 (m, 9 H);

1.09 (d, J=6.2 Hz, 3 H); 1.13 (m, 9 H); 1 .24 (s, 3 H); 1.66 (s, 3 H); 1.78 (m, 4 H); 1.99 (m. 4 H); 2.13 (m, 4 H); 2.25 (s, 3 H); 2.42 (d, J=13.0 Hz, 1 H); 2.53 (m, 1 H); 2.74 (quint, J=7.3 Hz, 1 H); 2.87 (m, 4 H); 2.98 (q, J=6.4 Hz, 1 H); 3.07 (m, 2 H); 3.32 (masked m, 1 H); 3.37 (s, 3 H); 3.46 (s, 3 H); 3.52 (m, 1 H); 3.62 (m, 2 H); 3.67 (t, J=2.5 Hz, 1 H); 3.80 (m, 4 H); 3.88 (m, 2 H); 4.29 (quint, J=7.8 Hz, 1 H); 4.44 (d, J=7.9 Hz, 1 H); 4.58 (d. J=9.3 Hz, 1 H); 4.63 (d, J=9.4 Hz, 1 H); 4.72 (d, J=4.5 Hz, 1 H); 4.83 (d, J=7.2 Hz, 1 H); 5.00 (dd, J=4.5 and 9.1 Hz, 1 H); 5.35 (d, J=4.5 Hz, 1 H); 6.27 (broad s, 1 H); 7.74 to 8.05 (m, 5 H).

EXAMPLE 6: Compound 6

(2R _! 3S,4R,5R,7S _! 9S,10S,11 R,12S,13R)-7-[(benzylcarbamoyi)oxy]-12-{[(2S,7R)-4- (2-fluoroethyl)-2,5-dimethyl-1 _! 4-oxazepan-7-yl]oxy}-2-(1-{[(2R,3R _! 4R,5R,6R)-5-hydroxy- 3,4-dimethoxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}propan-2- yl)-10-{[(2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]ox y}-3,5,7,9,11 ,13- hexamethyl-6,14-dioxooxacyclotetradecan-4-yl 3-methylbutanoate.

0.5 g of the compound obtained in Preparation 2 is placed in 10 ml of MeOH.

The solution obtained is cooled to 0C A solution of 0.475 mg of sodium metaperiodate in 10 ml of water is then rapidly added dropwise. After 15 minutes at 0 C. the mixture is allowed to warm to room temperature, and stirring is continued for 5 hours. The medium is saturated with NaCI (~3 g) and taken up in DCM (40 ml). The precipitate is filtered off and washed with saturated aqueous NaCI solution. The aqueous phase is extracted with DCM. The organic phases are combined, dried over MgSCU, filtered and then evaporated to dryness under vacuum. 443 mg of the expected product are obtained.

100 mg of this compound are dissolved in 2.2 ml of MeOH, followed by addition, in the following order, of 25 μΙ of TEA, 22 mg of 2-fluoroethylamine hydrochloride, 12.7 μΙ of acetic acid and finally 16.8 mg of NaBH ₃ CN. The medium is stirred for 20 hours at room temperature. 20 ml of DCM are added and the resulting mixture is washed with saturated aqueous sodium bicarbonate solution and then with aqueous NaCI solution. The aqueous phases are extracted with DCM. The organic phases are combined, dried over Na ₂ S0 ₄ , filtered and then evaporated to dryness. 92 g of the product obtained are purified by chromatography on silica (5 g of 15-40 m silica) with a 97/3 DCM/MeOH eluent mixture. The expected product is obtained in the form of a mixture of diastereoisomers.

MS: method b

Retention time Tr (min) = 1 .28; [M-H+HC0 ₂ H]-: m/z 1198.

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 70/30 mixture of the diastereoisomers 0.78 (d, J=6.8 Hz, 3 H); 0.91 (d, J=6.9 Hz, 3 H); 0.94 (d, J=7.3 Hz, 3 H); 0.98 (dd, J=1.6 and 6.6 Hz, 6 H); 1 .01 to 1.16 (m, 21 H); 1 .60 to 2.22 (m, 15 H); 2.52 (masked m, 1 H); 2.59 (d, J=5.0 Hz, 1 H); 2.68 to 3.08 (m, 9 H); 3.28 (masked m, 1 H); 3.38 (s, 3 H); 3.46 (s, 3 H); 3.52 (m, 1 H); 3.64 (m, 2 H); 3.72 to 3.93 (m, 7 H); 4.10 (d, J=6.0 Hz, 2 H); 4.24 (m, 1 H); 4.41 (m, 3 H); 4.56 to 4.72 (m, 3 H); 4.83 (d, J=7.1 Hz, 1 H); 4.88 (m, 0.7 H); 4.99 (dd, J=4.0 and 9.1 Hz, 0.3 H); 5.13 (d, J=4.6 Hz, 0.7 H); 5.31 (d, J=4.6 Hz, 0.3 H); 7.28 (m, 5 H). EXAMPLE 7: Compound 7

Compound 7-a: (2R,3S _! 4R,5RJS,9S,10S,11 R,12S,13R)-7-

[(benzylcarbamoyl)oxy]-2-(1-{[(2R,3R,4R,5R,6R)-5-hydroxy- 3 _! 4-dimethoxy-6- methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)-10-{[(2S,3R, 6R)-3-hydroxy-4- (methoxyimino)-6-methyltetrahydro-2H-pyran-2-yljoxy}-3,5,7,9 ,1 1 ,13-hexamethyl-6,14- dioxo-12-{[(2S,5R,7R)-2,4,5-trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yl 3- methylbutanoate. Compound 7-b: (2R,3S.4R,5RJS,9S _! 10S,11 R,12S,13R)-7-

[(benzylcarbamoyl)oxy]-2-(1-{[(2R _! 3R _! 4R _! 5R,6R)-5-hydroxy-3,4-dimethoxy-6- methyltetrahydro-2H-pyran-2-yl]oxy}propan-2-yl)-10-{[(2S,3R, 6R)-3-hydroxy-4- (methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl]oxy}-3,5,7,9 ,1 1 ,13-hexamethyl-6,14- dioxo-12-{[(2S,5S,7R)-2 _! 4,5-trimethyl-1 ,4-oxazepan-7-yl]oxy}oxacyclotetradecan-4-yi 3- methylbutanoate.

(7.a) (7.b)

0.68 g of the compound obtained in Preparation 2 is placed in THF (7 ml). The solution obtained is cooled to O 'C. A solution of sodium metaperiodate in 7ml of water is then rapidly added. After 15 minutes at 0 C, the mixture is allowed to warm to room temperature, and stirring is continued for 6 hours. The precipitate formed is filtered off and rinsed with 7 ml of THF. A 2N solution of methylamine in 1.21 ml of THF and then 139.04 μΙ of acetic acid are added. After stirring for 5 minutes at room temperature, 199.63 mg of NaBH ₃ CN are added. The suspension obtained is stirred at room temperature for 20 hours. The precipitate formed is filtered off and rinsed with 50 ml of DCM. The filtrate is washed with 30 ml of saturated aqueous NaHCC>3 solution and then with 30 ml of saturated aqueous NaCI solution. The aqueous phases are extracted with 50 ml of DCM. The organic phases are combined, dried over MgSCu, filtered and then evaporated to dryness under vacuum. The product obtained is purified by chromatography on a Merck cartridge (50 g of 15-40 μιτι silica), eluting with a 94/6 CHCI.VMeOH mixture. 320 mg of the expected compound 7 -a, 77 mg of the other diastereoisomer 7-b and 147 mg of a mixture of diastereoisomers are obtained.

Compound 7 -a:

MS: method b

Retention time Tr (min) = 1.31 ; [M-H+HC0 ₂ H] ^" : m/z 1 166 (base peak). 1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ + CD ₃ COOD): 0.81 (d, J=6.9 Hz, 3 H); 0.93 (d, J=6.8 Hz, 3 H); 0.95 to 1.02 (m, 9 H); 1.05 to 1.17 (m, 15 H); 1.24 (d, J=6.0 Hz, 3 H); 1 .30 (d, J=6.6 Hz, 3 H); 1 .74 (m, 7 H); 2.04 (m, 3 H); 2.18 (m, 5 H); 2.78 (s, 3 H); 2.79 (m, 1 H); 2.89 (d, J=14.8 Hz, 1 H); 2.93 (dd, J =2.5 and 8.0 Hz, 1 H); 3.03 (m, 2 H); 3.13 (m, 1 H); 3.35 (m, 2 H); 3.40 (s, 3 H); 3.45 (m, 1 H); 3.48 (s, 3 H); 3.51 (m, 2 H); 3.68 (m, 2 H); 3.82 (s, 3 H); 3.87 (m, 2 H); 3.94 (d, J=4.9 Hz, 1 H); 4.13 (d, J=5.7 Hz, 2 H); 4.45 (m, 2 H); 4.62 (m, 3 H); 5.12 (dd, J=4.5 and 8.4 Hz, 1 H); 7.28 (m, 6 H). Compound 7-b:

MS: method b

Retention time Tr (min) = 1.32; |M-H+HC0 ₂ H] ^" : m/z 1 166 (base peak).

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ + CD ₃ COOD): 0.82 (d, J=6.9 Hz, 3 H); 0.94 (d, J=6.8 Hz, 3 H); 1.02 (m, 9 H); 1.08 (m, 6 H); 1.14 (m, 9 H); 1.22 (d, J=6.1 Hz, 3 H); 1.34 (d, J=6.8 Hz, 3 H); 1 .75 (s, 3 H); 1.82 (m, 3 H); 1.90 to 1.95 (masked m, 1 H); 1 .99 (m, 2 H); 2.09 (m, 1 H); 2.19 (m, 3 H); 2.35 (m, 2 H); 2.69 (m, 1 H); 2.79 (s, 3 H); 2.96 (m, 2 H); 3.04 (m, 2 H); 3.15 (dd, J=9.6 and 13.6 Hz, 1 H); 3.23 (d, J=13.6 Hz, 1 H); 3.32 (dd, J=4.8 and 9.7 Hz, 1 H); 3.40 (s, 3 H); 3.48 (s, 3 H); 3.53 (m, 2 H); 3.66 (m, 2 H); 3.70 (t, J=1.0 Hz, 1 H); 3.80 (m, 4 H); 3.94 (d, J=5.2 Hz, 1 H); 4.06 (broad s, 1 H); 4.14 (m, 2 H); 4.38 (m, 1 H); 4.47 (d, J=7.9 Hz, 1 H); 4.56 (m, 3 H); 5.15 (m, 1 H); 7.21 to 7.33 (m, 6 H).

Alternative for the reparation of compound 7 -a

(7 a)

0.2 ml of CHCI ₃ , 12 mg of compound 8-a of Example 8,108 μΙ of 0.1 M formic acid and 3 μΙ of formaldehyde are added together with stirring, under argon, and the mixture is heated for 30 minutes at 50 C. The reaction medium is neutralized with saturated aqueous sodium bicarbonate solution and extracted with DCM. The organic phase is dried over MgSC , filtered and then evaporated to dryness under vacuum. The residue obtained is purified by chromatography on silica (2.5 g of 15-40 μιη SiOH) with a 95/5 to 90/10 CHCb/MeOH elution gradient. 6.2 mg of the expected product are obtained. on of compound 7 -a

(7.a)

Step 1

1 .35 g of compound 1 -a of Example 1 and 1.1 1 g of Ν,Ν'-carbonyldiimidazole are placed in 8 ml of cyclohexane. The mixture is heated at 100 C for 35 minutes by microwave. The heterogeneous medium is taken up in 60 ml of DCM and washed with 40 ml of water and then with 40 ml of saturated NaCI solution. The aqueous phases are re-extracted with 60 ml of DCM. The organic phases are combined, dried over MgSCU, filtered and then evaporated to dryness under vacuum. 1.7 g of the expected compound is obtained.

MS: method e

Retention time Tr (min) = 3.67; [M+Hf: 1271 Step 2

1 .7 g of the compound prepared in step 1 are placed in 17 ml of THF. 6.84 ml of 1 M HCI are added. The mixture is stirred for 3 hours at room temperature. 50 ml of DCM are added and the resulting mixture is washed with saturated NaHC0 ₃ solution (20 ml) and then with saturated NaCI solution (20 ml). The aqueous phases are re-extracted with 50 ml of DCM. The organic phases are combined, dried over MgS0 ₄ , filtered and then evaporated to dryness under vacuum. 1.48 g of the expected product are recovered. MS: method e

Retention time Tr (min) = 3.41 ; [M+Hf: 1083

Step 3

(7.a)

1 g of the product prepared above is placed in DMF (10 ml). Benzylamine (305.54 μΙ) and 1 ,8-diazabicyclo[5.4.0]undec-7-ene (168.87 μΙ) are added. The mixture is stirred at room temperature for 24 hours. The resulting mixture is extracted with 60 ml of EtOAc and washed with 30 ml of water and then with 30 ml of saturated NaCI solution. The aqueous phases are re-extracted with 60 ml of EtOAc. The organic phases are combined, dried over MgS0 ₄ , filtered and then evaporated to dryness under vacuum. 1.1 g of a yellow oil are obtained. The product is purified by chromatography on a Merck cartridge (50 g of 15-40 μιτι SiOH), eluting with a 98/2 EtOAc/TEA mixture. 400 mg of the expected compound is obtained.

EXAMPLE 8: Compound 8

Compound 8-a: (2R,3S,4R,5R,7S,9S,10S,11 R,12S,13R)-7- [(benzylcarbamoyl)oxy]-12-{[(2S,5R,7R)-2,5-dimethyl-1 ,4-oxazepan-7-yl]oxy}-2-(1-

{[(2R,3R,4R _! 5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydro-2H-p yran-2- yl]oxy}propan-2-yi)-10-{[(2S,3R _! 6R)-3-hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H- pyran-2-yl]oxy}-3,5.7,9,1 1 ,13-hexamethyl-6.14-dioxooxacyclotetradecan-4-yl 3- methylbutanoate.

Compound 8-b: (2R,3S,4R,5R,7S,9S,10S,1 1 R,12S,13R)-7- [(benzylcarbamoyl)oxy]-12-{[(2S,5SJR)-2,5-dimethyl-1 ,4-oxazepan-7-yl]oxy}-2-(1- {[(2R,3R,4R,5R.6R)-5-hydroxy-3,4-dimethoxy-6-methyltetrahydr o-2H-pyran-2- yl]oxy}propan-2-yl)-10-{[(2S,3R,6R)-3-hydroxy-4-(methoxyimin o)-6-methyltetrahydro-2H- pyran-2-yl]oxy}-3,5,7,9,1 1 ,13-hexamethyl-6,14-dioxooxacyclotetradecan-4-yl 3- methylbutanoate.

1 ml of toluene, 0.2 g of the product obtained in Preparation 1 and 196 mg of Ν,Ν'- carbonyldiimidazole are placed under argon. The reaction medium is heated for 3 hours at 80 C and then concentrated under vacuum. DCM is added and the resulting mixture is then washed with saturated aqueous NaCI solution. The organic phase is dried over MgSCU, filtered and then evaporated to dryness under vacuum. The residue is purified by chromatography (10 g of 15-40 pm silica) with a 98/2 to 95/5 DCM/MeOH elution gradient. 1 12 mg of the expected compound is obtained.

MS: method b

Retention time Tr (min) = 1.63; [M+Hf: 1300

Step 8.2:

3 ml of THF, 240 mg of the macrolide prepared in step 8.1 and 369 μΙ of 1 M HCI are stirred together under argon. The pale yellow homogeneous medium is stirred overnight at room temperature. A further 369 μΙ of 1 M HCI are added and stirring is continued for 24 hours. The reaction medium is neutralized with saturated aqueous sodium bicarbonate solution. The resulting mixture is extracted with EtOAc. The organic phase is dried over MgS0 ₄ , filtered and then evaporated to dryness under vacuum. 181 mg of the residue obtained are purified by chromatography (10 g of 15-40 μηι silica) with a 50/50 to 70/30 EtOAc/heptane elution gradient. 87 mg of the expected compound is obtained.

MS: method b

Retention time Tr (min) = 1.56; [M-H+HC0 ₂ H] ^" : m/z 1 156 (base peak). Ste 8.3:

10 ml of DMF, 1 g of the compound obtained in step 8.2, 188 μΙ of 1 ,8-diazabicyclo [5.4.0]undec-7-ene and 138 μΙ of benzylamine are stirred together under argon. The homogeneous medium is stirred overnight at room temperature. 20 g of ice are added to the reaction medium and the resulting mixture is then extracted with 3 ^χ 20 ml of EtOAc. The organic phases are combined and washed with 20 ml of saturated aqueous NaCI solution, and the organic phase is dried over MgS0 ₄ , filtered and then evaporated to dryness under vacuum. 975 mg of residue are purified by chromatography (50 g of 15- 40 pm silica), eluting with a 7/3 EtO Ac/heptane mixture. 490 mg of the expected compound is obtained.

MS: method b

Retention time Tr (min) = 1.68; [M-H+HC0 ₂ H] ^" : m/z 1 195 (base peak).

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.79 (d, J=6.9 Hz, 3 H);

0.88 to 1.01 (m, 12 H); 1.05 (m, 6 H); 1.11 (m, 6 H); 1.14 (d, J=6.0 Hz, 3 H); 1 .30 (d,

J=5.5 Hz, 3 H); 1.52 (s, 3 H); 1.67 to 1.86 (m, 4 H); 1.71 (s, 3 H); 1.94 to 2.10 (m, 4 H);

2.15 (m, 4 H); 2.36 (dd, J=5.1 and 13.6 Hz, 1 H); 2.77 (m, 2 H); 2.92 (dd, J=2.5 and 8.0 Hz, 1 H); 3.01 (m, 2 H); 3.27 to 3.32 (masked m, 1 H); 3.37 (s, 3 H); 3.45 (s, 3 H);

3.52 (m, 2 H); 3.61 to 3.68 (m, 2 H); 3.80 (s, 3 H ); 3.84 (d, J=6.9 Hz, 1 H); 3.95 (m, 2 H);

4.13 (m, 3 H); 4.45 (d, J=8.0 Hz, 1 H); 4.55 (d, J=9.9 Hz, 1 H); 4.65 (m, 2 H); 4.87 (d,

J=7.1 Hz, 1 H); 4.99 (dd, J=5.4 and 8.4 Hz, 1 H); 5.43 (m, 1 H); 7.26 (m, 5 H); 7.38 (broad t, J=6.0 Hz, 1 H). Ste 8.4:

55 ml of MeOH, 300 mg of the macrolide prepared in the preceding step and 108 mg of K ₂ C0 ₃ are stirred together under argon. The reaction medium is stirred for 24 hours at room temperature, followed by addition of a further 72 mg of K ₂ C0 ₃ . The reaction medium is stirred for a further 24 hours, and 30 ml of saturated aqueous NaCI solution are then added. The resulting mixture is extracted with EtOAc (3 * 100 ml). The organic phase is separated out after settling of the phases, dried over MgS0 ₄ , filtered and then evaporated to dryness. 300 mg of the residue obtained are purified by chromatography (30 g of 15-40 pm silica), eluting with a 7/3 EtOAc/heptane mixture. 265 mg of the expected product are obtained.

Step 8.5:

(8.a) (8.b)

3.5 ml of THF and 340 mg of the compound obtained in the preceding step are stirred together under argon. The solution obtained is cooled to 0 C, followed by dropwise addition of an aqueous solution of 325 mg of sodium metaperiodate in 3.5 ml of water. Stirring is continued at 0 C for 10 minutes, and the mixture is then allowed to warm to room temperature. After stirring for 5 hours 30 minutes, the precipitate formed is filtered off and rinsed with 4 ml of THF. 64.8 mg of NH ₄ CI are added to the filtrate obtained, followed, after stirring for 5 minutes at room temperature, by 95 mg of NaBH ₃ CN. The reaction medium is stirred at room temperature for 20 hours. The precipitate formed is filtered off and rinsed with DCM. The filtrate is washed with saturated sodium bicarbonate solution and then with aqueous NaCI solution. The aqueous phases are extracted with DCM. The organic phases are combined, dried over MgSC , filtered and then evaporated to dryness under vacuum. The 278 mg of residue are purified by chromatography on silica (20 g of 15-40 μ SiOH) with a 98/2 to 95/5 CHCI ₃ /MeOH elution gradient. 120 mg of diastereoisomer 8 -a and 14 mg of diastereoisomer 8-b are obtained.

Compound 8 -a:

MS: method b

Retention time Tr (min) = 1 .3; [M-H+HC0 ₂ H] ^" : m/z 1 152 (base peak).

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.78 (d, J=6.6 Hz, 3 H);

0.91 (d, J=6.9 Hz, 3 H); 0.95 (d, J=7.1 Hz, 3 H); 0.99 (d, J=6.6 Hz, 6 H); 1.03 to 1.12 (m, 21 H); 1.75 (m, 8 H); 1.99 (m, 4 H); 2.15 (m, 3 H); 2.50 (masked m, 1 H); 2.68 to 2.94 (m, 5 H); 3.01 (m, 2 H); 3.29 (masked m, 1 H); 3.38 (s, 3 H); 3.45 (s, 3 H); 3.52 (m, 1 H); 3.61 to 3.90 (m, 6 H); 3.80 (s, 3 H); 4.10 (m, 3 H); 4.45 (d, J=7.7 Hz, 1 H); 4.62 (m, 3 H); 4.86 (d, J=7.1 Hz, 1 H); 4.95 (m, 1 H); 5.26 (d, J=4.4 Hz, 2 H); 7.20 to 7.32 (m, 5 H); 7.36 (t, J=6.0 Hz, 1 H).

Compound 8-b:

MS: method b

Retention time Tr (min) = 1.12; [M-H+HC0 ₂ H] ^" : m/z 1 152 (base peak).

1 H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.78 (d, J=6.9 Hz, 3 H);

0.91 (d, J-6.6 Hz, 3 H); 0.98 (m, 9 H); 1 .03 to 1.16 (m, 21 H); 1.69 to 2.20 (m, 12 H);

1.72 (s, 3 H); 2.71 (m, 3 H); 2.92 (m, 2 H); 3.01 (m, 3 H); 3.10 (m, 1 H); 3.34 (masked m.

1 H); 3.38 (s, 3 H); 3.45 (s, 3 H); 3.52 (m, 1 H); 3.63 (dd, J-4.5 and 9.7 Hz, 1 H); 3.67 (broad s, 1 H); 3.71 to 3.81 (m, 3 H); 3.79 (s, 3 H); 3.87 (t, J =4.7 Hz, 1 H); 4.09 (m,

3 H); 4.45 (d, J=8.0 Hz, 1 H); 4.60 (m, 3 H); 4.83 (d, J=6.9 Hz, 1 H); 5.01 (m, 1 H); 5.14 (d,

J=3.6 Hz, 1 H); 7.20 to 7.35 (m, 6 H). Table 1 : Structures and analyses of compounds prepared according to one of the processes described in Examples 1 to 8 above and 9 to 1 1 below.

EXAMPLE 9: Compound 70

(2R,3S,4R _I 5R,7S _! 9S,10S,11 R,12S,13R)-2-((S)-1-(((2R,3R,4R,5R,6R)-5-hydroxy-3,4- dimethoxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)propan-2-yi)- 10-(((2S _! 3R,6R)-3-hydroxy- 4-(methoxyimino)-6-methyitetrahydro-2H-pyran-2-yi)oxy)-3,5,7 ,9,1 1 ,13-hexamethyl-7-(((2- methyi-1 -((phenylsulfonamido)propan-2-yl)carbamoyl)oxy)-6,14-dioxo-1 2-(((2S,5R,7R)- 2,4,5-trimethyl-1 _! 4-oxazepan-7-yl)oxy)oxacyclotetradecan-4-yl 3-meihylbutanoate.

Step 9.1

3 g of compound 1 -a obtained in Example 1 are placed in pyridine (30 ml). Acetic anhydride (2.88 ml) is added. The mixture is stirred at room temperature for 40 hours. The resulting mixture is concentrated under vacuum, and extracted with 3 ^χ 60 ml of DCM, washed with 40 ml of 1 M HCI, then with saturated aqueous NaHCOs solution and finally with saturated NaCI solution. The organic phases are combined, dried over MgSCu, filtered and then evaporated to dryness. 3.5 g of the expected product are obtained in the form of a white powder.

MS: method e

Retention time Tr (min) = 4.01 ; [M+H] ⁺ : 1073

tep 9.2

Step 9.2.a:

4.2 g of the compound prepared in step 9.1 are placed in DCM (150 ml). Pyridine

(5.43 ml) is added and the mixture is cooled to 0 C. Tnchloromethyl chloroformate (diphosgene) (842.40 μΙ) is added and stirring is continued for 3 hours at 0 C. 4- Dimethylaminopyridine (507.03 mg) is added, the mixture is then allowed to warm to room temperature and stirring is continued overnight. The resulting mixture is evaporated to dryness under vacuum. The crude reaction product is used as obtained for the following stage.

Step 9.2. b: condensation of the amine DMF (70 ml) is added to the crude reaction medium obtained in the above step. A dark brown suspension is obtained. TEA (4.91 ml) is added in a single portion, followed by N-(2-amino-2-methylpropyl)benzenesulfonamide hydrochloride (2.80 g) in a single portion. The reaction mixture is stirred magnetically at room temperature for 24 hours. 400 ml of EtOAc are added. The mixture is washed with 200 ml of water and then with 200 ml of saturated aqueous NaCI solution. The aqueous phases are re-extracted with 400 ml of EtOAc. The organic phases are combined, dried over MgS0 ₄ , filtered through a sinter funnel and concentrated under reduced pressure. 8 g of a brown oil are recovered.

Step 9.2. c: deprotection of the alcohols

MeOH (40 ml) is added to the 8 g of brown oil obtained above. An orange solution is obtained. Potassium carbonate (1 .30 g) is added in a single portion. The reaction mixture is stirred magnetically at room temperature for 2 hours 30 minutes. 150 ml of DCM are added. The mixture is washed with 75 ml of water and then with 75 ml of saturated aqueous NaCI solution. The aqueous phases are re-extracted with 150 ml of DCM. The organic phases are combined and then dried over MgSC and finally filtered through a sinter funnel. The filtrate is evaporated to dryness, and 3.5 g of an orange foam are recovered. The product is purified by preparative HPLC under the following conditions:

^■ Apparatus: Waters 4000

^■ Stationary phase: Kromasil C18 10 μι~η 300 x 50 mm

^■ Mobile phase: B: 70/30 v/v acetonitrile/H?0 + 10 mM of ammonium acetate

^■ Flow rate: 120 ml/min

^■ UV detection: 210 nm ^■ Cell length: 2.5 mm

After evaporation and lyophilization, the following is obtained:

800 mg in the form of a yellow powder corresponding to the expected product.

MS: method b

Retention time Tr (min) = 1.15; [M+H] ⁺ : 1243

1 H NMR spectrum (500MHz, in ppm, DMSO-d ₆ ): 0.77 (d, J=6.6 Hz, 3 H); 0.88 to 0.97 (m, 12 H); 1.00 to 1 .15 (m, 27 H); 1.62 to 1.82 (m, 4 H); 1 .67 (s, 3 H); 1.90 to 2.05 (m, 4 H); 2.09 to 2.20 (m, 4 H); 2.19 (s, 3 H); 2.39 (dd, J=9.7 and 13.9 Hz, 1 H); 2.59 (m, 1 H); 2.68 to 2.79 (m, 3 H); 2.83 to 2.93 (m, 3 H); 2.98 (broad q, J =6.6 Hz, 1 H); 3.03 (m, 1 H); 3.30 (m, 1 H); 3.37 (s, 3 H); 3.45 (s, 3 H); 3.52 (m, 1 H); 3.59 to 3.69 (m, 3 H); 3.76 (broad d, J=4.1 Hz, 1 H); 3.80 (s, 3 H); 3.83 (m, 1 H); 3.88 (t, J=4.8 Hz, 1 H); 4.28 (m, 1 H); 4.45 (d, J=8.0 Hz, 1 H); 4.59 (d, J=9.9 Hz, 1 H); 4.68 (m, 2 H); 4.87 (d, J=7.1 Hz, 1 H); 4.91 (dd, J=2.6 and 9.2 Hz, 1 H); 5.27 (d, J=4.8 Hz, 1 H); 6.22 (s, 1 H); 7.51 (broad t, J=6.6 Hz, 1 H); 7.58 (t, J=7.5 Hz, 2 H); 7.63 (t, J=7.5 Hz, 1 H); 7.78 (d, J=7.5 Hz, 2 H).

EXAMPLE 10: Compound 72

(2R,3S,4R,5R,7S,9S, 10S, 11 R, 12S.13R)-10-{[(2S,3R,6R)-4-{[(1 -{[(5R)-3-(3- fluorophenyl)-2-oxo-1 ,3-oxazolidin-5-yl]methyl}-1 HA ,2,3-triazol-4-yl)methoxy]imino}-3- hydroxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}-7-hydroxy-2-(1 -{[(2R,3R,4R _! 5R,6R)-5- hydroxy-3,4-dimethoxy-6-methyltetrahydro-2/-/-pyran-2-yl]oxy }propan-2-yl)-3,5.7,9,1 1 ,13- hexamethyl-6,14-dioxo-12-{[(2S,5R,7R)-2,4,5-trimethyl-1 ,4-oxazepan-7- yl]oxy}oxacyclotetradecan-4-yl 3-methylbutanoate.

200 mg of the compound obtained in Preparation 5 are placed in 2 ml of THF, the solution is cooled to O C and 172.51 mg of sodium metaperiodate dissolved in 2 ml of water are then added. The mixture is allowed to warm to room temperature, and stirring is continued for 4 hours. The precipitate is filtered off and rinsed with 0.5 ml of THF.

400 μΙ of a 2 M solution of methylamine in THF, then 46 μΙ of acetic acid and finally 63.5 mg of NaBH ₃ CN are added to the filtrate. The suspension obtained is stirred at room temperature for 18 hours. The suspension is taken up in 40 ml of DCM. The mixture is washed with 20 ml of saturated aqueous NaHC0 ₃ solution and then with 20 ml of saturated aqueous NaCI solution. The organic phase is dried over MgS0 ₄ , filtered and finally concentrated under reduced pressure. The crude mixture is purified by chromatography on a Merck cartridge (10 g of 15-40 prn silica), eluting with a 92/8 CHCLVMeOH mixture.

41 mg of the expected product and 5 mg of the other diastereoisomer are recovered.

MS: method b

ES ^" : [M-H+HC0 ₂ H] ^" : m/z 1293

1 H NMR spectrum (500 MHz, In ppm, DMSO-d ₆ ): 0.79 (d, J=6.8 Hz, 3 H);

0.93 (d, J=6.8 Hz, 6 H); 0.95 to 1 .00 (m, 9 H); 1.02 (d, J=6.6 Hz, 3 H); 1.05 to 1.14 (m, 15 H); 1.24 (s, 3 H); 1.48 (m, 1 H); 1.69 to 1.80 (m, 2 H); 1.83 to 2.07 (m, 6 H); 2.11 to

2.21 (m, 3 H); 2.17 (s, 3 H); 2.35 (dd, J=9.4 and 14.1 Hz, 1 H); 2.56 (m, 1 H); 2.69 (d, J=12.6 Hz, 1 H); 2.75 (m, 1 H); 2.83 (dd, J=3.0 and 16.5 H, 1 H); 2.92 (dd, J=2.6 and 7.9 Hz, 1 H); 3.03 (m, 1 H); 3.12 (broad q, J =6.8 Hz, 1 H); 3.30 (partially masked m, 1 H); 3.38 (s, 3 H); 3.45 (s, 3 H); 3.52 (m, 1 H); 3.59 to 3.73 (m, 4 H); 3.82 to 3.94 (m. 3 H);

4.22 to 4.28 (m, 2 H); 4.31 (s, 1 H); 4.45 (d, J-7.9 Hz, 1 H); 4.66 (d, J=9.7 Hz, 1 H); 4.68 (d, J=4.7 Hz, 1 H); 4.74 (d, J=9.4 Hz, 1 H); 4.82 (d, J=5.3 Hz, 2 H); 4.86 (d, J=7.2 Hz, 1 H); 4.91 (dd, J=3.1 and 9.4 Hz, 1 H); 5.1 1 (s, 2 H); 5.15 (m, 1 H); 5.30 (d, J=4.7 Hz, 1 H); 6.97 (dt, J=2.3 and 8.4 Hz, 1 H); 7.27 (dd, J=1 .5 and 8.4 Hz, 1 H); 7.40 to 7.47 (m,

2 H); 8.21 (s, 1 H).

EXAMPLE 11 : Compound 88

(2R,3S _! 4R,5RJS,9S,10S,11 R,12S,13R)-2-((S)-1 -(((2R,3R,4 ,5R,6R)-5-hydroxy- 3,4dimethoxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)propan-2-y l)-10-(((2S,3R,6R)-3- hydroxy-4-(methoxyimino)-6-methyltetrahydro-2H-pyran-2-yl)ox y)-7- ((methoxycarbonyl)oxy)-3,5,7 _! 9,1 1 ,13-hexamethyl-6,14-dioxo-12-(((2S,7R)-2,4,5- trimethyl-1 ,4-oxazepan-7yl)oxy)oxacyclotetradecan-4-yl 3-methylbutanoate.

(88)

Step 1 1.1

556 mg of the mixture of diastereoisomers obtained in Example 1 and 456 mg of Ν,Ν'-carbonyldiimidazole are placed in cyclohexane (3.3 ml). The mixture is heated at 100 C for 35 minutes by microwave. The heterogeneous medium is taken up in 30 ml of DCM and washed with 20 ml of water and then with 20 ml of saturated NaCI solution. The aqueous phases are re-extracted with 30 ml of DCM. The organic phases are combined, dried over MgSC , filtered and then evaporated to dryness under vacuum. 710 mg of the expected product are obtained. MS: method a

Retention time Tr (min) = 1.19; [M+H] ⁺ : 1271

1 H NMR (in ppm, DMSO-d ₆ ) - Bruker spectrometer: 0.79 (d, J=6.9 Hz, 3 H); 0.85 (d, J=7.1 Hz, 3 H); 0.90 to 0.95 (m, 12 H); 1 .01 (d, J=6.9 Hz, 3 H); 1.06 to 1.14 (m, 9 H); 1 .17 (d, J=6.3 Hz, 3 H); 1 .25 (d, J=6.3 Hz, 3 H); 1.75 to 1.87 (m, 3 H); 1.92 (s, 3 H); 1.94 to 2.18 (m, 9 H); 2.20 (s, 3 H); 2.47 (m, 1 H); 2.65 to 2.81 (m, 3 H); 3.07 to 3.19 (m, 3 H); 3.37 (m, 1 H); 3.41 (s, 3 H); 3.44 (s, 3 H); 3.63 to 3.78 (m, 3 H); 3.72 (s, 3 H); 3.93 to 4.00 (m, 2 H); 4.10 to 4.17 (m, 2 H); 4.56 to 4.64 (m, 3 H); 4.69 (d, J=9.6 Hz, 1 H); 4.84 (m, 1 H); 5.00 (d, J=7.4 Hz, 1 H); 5.24 (d, J=7.4 Hz, 1 H); 7.10 (dd, J=0.8 and 1.6 Hz, 1 H); 7.12 (dd, J=0.8 and 1.6 Hz, 1 H); 7.15 (broad s, 1 H); 7.46 to 7.47 (t, J=1 .6 Hz, 1 H); 7.62 (t, J=1 .6 Hz, 1 H); 7.64 (t, J=1 .6 Hz, 1 H); 8.12 (broad s, 1 H); 8.28 (broad s, 1 H); 8.30 (broad s, 1 H).

Step 1 1.2

500 mg of the compound isolated in step 11.1 are placed in THF (5 ml). 1 M hydrochloric acid (1 .97 ml) is added. The mixture is stirred for 3 hours at room temperature. 50 ml of DCM are added and the resulting mixture is washed with saturated NaHCO;} solution (20 ml) and then with saturated NaCI solution (20 ml). The aqueous phases are re-extracted with 50 ml of DCM. The organic phases are combined, dried over MgSO.i, filtered and then evaporated to dryness under vacuum. 420 mg of the expected product are recovered. MS: method a

Retention time Tr (min) = 1.02; [M+Hf: 1083 Step 1 1.3

50 mg of the compound prepared in step 1 1.2 are placed in MeOH (1 ml). Potassium carbonate (32.22 mg) is added and the mixture is stirred at room temperature for 4 hours. 15 ml of DCM are added and the mixture is washed with water and then with saturated NaCI solution. The aqueous phases are extracted with 15 ml of DCM. The organic phases are combined, dried over MgSCu, filtered and then evaporated to dryness under vacuum. 57 mg of a lacquer are obtained, which product is purified by chromatography on a Merck cartridge (2.5 g of 15-40 μιη SiOH), eluting with a 97/3 EtOAc/TEA mixture. The fraction of Rf 0.35/0.45 (core fraction) is recovered, i.e. 14 mg of the expected compound.

MS: method a

Retention time Tr (min) = 1.07; [M+Hf: 1047

1H NMR spectrum (500 MHz, in ppm, DMSO-d ₆ ): 0.76 - 0.81 (m, 3 H); 0.89

- 0.94 (m, 6 H); 0.96 (d, J=6.6 Hz, 6 H); 0.99 - 1 .17 (m, 21 H); 1.73 - 1.82 (m, 6 H); 1 .85 (m, 1 H); 1.91 - 2.06 (m, 5 H); 2.11 - 2.21 (m, 6 H); 2.38 (dd, J=14.0, 9.6 Hz, 1 H); 2.53

- 2.66 (m, 1 H); 2.66 - 2.77 (m, 2 H); 2.81 - 2.89 (m, 1 H); 2.92 (dd, J=7.8, 2.6 Hz, 1 H); 2.98 - 3.06 (m, 2 H); 3.27 - 3.31 (masked m, 1 H); 3.38 (s, 3 H); 3.45 (s, 3 H); 3.48 - 3.56

(m, 1 H); 3.58 - 3.71 (m, 6 H); 3.74 - 3.78 (m, 1 H); 3.80 (s, 3 H); 3.82 - 3.92 (m, 2 H); 4.26 (d, J=6.3 Hz, 1 H); 4.45 (d, J=8.0 Hz, 1 H); 4.59 (d, J=10.2 Hz, 1 H); 4.63 - 4.75 (m, 2 H); 4.81 - 4.94 (m, 2 H); 5.29 - 5.34 (m, 1 H).

Table 2: Structures and analyses of compounds prepared according to one of the processes described in Examples 1 to 8 and 9 to 1 1 above.

[USES] The compounds corresponding to the general formula (I) that are the subject of the invention underwent microbiological trials which showed their value as therapeutically active substances. Specifically, they have bacteriostatic and/or bactericidal action on mycobacteria, especially against strains of Mycobacterium or Coryneba cterium , which are in particular sensitive and resistant to the first-line antibiotics.

The compounds corresponding to the general formula (I) which are the subject of the invention also have bacteriostatic and/or bactericidal action on gram-positive microorganisms, in particular on staphylococci and streptococci.

More precisely, the compounds corresponding to the general formula (I) which are the subject of the invention are used for the prevention and/or treatment of bacterial infections caused by mycobacteria and gram-positive microorganisms.

Measurement of the inhibitory activity (iC ₈₀ ) of the compounds according to the invention towards Streptococcus pneumoniae Materials and methods

The test used is a bioluminescence test, the aim of which is to measure the inhibition of bacterial growth of Streptococcus pneumoniae by quantification of the amount of adenosine triphosphate (ATP). Specifically, ATP is a major and mandatory energy intermediate of very many reactions of cell metabolism which characterizes live media.

ATP quantification is performed at the end of the test by using an enzyme, luciferase, which, in the presence of ATP and of a specific substrate, luciferin, produces quantifiable light. Thus, in the presence of luciferin and luciferase at non-saturating concentrations, the value obtained in relative light units (RLU) will make it possible, by means of a calibration, to estimate the amount of ATP and thus deduce the number of live bacteria at the end of the incubation period.

Thus, the more the RLU value obtained at the end of the test tends towards zero, the more the product inhibits the total growth of bacteria.

The results (Table 3) are expressed in I Ceo- The I Ceo corresponds to 80% inhibition of the bacterial growth of S. pneumoniae with, as reference antibiotic, vancomycin, which has an ICso of 0.14 μΜ.

The experiments performed demonstrate that the compounds according to the present invention have activity on inhibiting the growth of S. pneumoniae. The ICso values are typically between 0.1 and 10 μΜ, or even between 0.1 and 1 μΜ.

Measurement of the inhibitory activity of the compounds according to the invention towards Mycobacterium tuberculosis

The in vitro test used makes it possible to identify molecules having antimicrobial activity on the strain of Mycobacterium tuberculosis H37R _V This is a bacterium of biohazard category 3.

Materials and methods The test used is Aiamar blue (MABA). This is a colorimetric test which makes it possible to determine the MIC (minimum inhibitory concentration) of antibacterial agents. Aiamar blue is a redox indicator which changes from blue to pink in the case of bacterial growth. Resazurin (blue and non-fluorescent) is reduced to resorufin (pink and fluorescent) by live bacteria. The plate is thus read visually or by fluorescence measurement. The fluorescence intensity is proportional to the number of live bacteria.

Thus, the more the fluorimetric MIC value tends towards zero, the less the amount of product necessary to inhibit the total growth of the bacteria.

The experiments performed demonstrate that the compounds according to the present invention have activity on inhibiting the growth of M. tuberculosis. The MIC values are typically between 0.1 and 10 μΜ, or even between 0.1 and 1 uM. The compounds presented as examples in the present patent application generally have MIC values of less than 1 μΜ.

Table 3: Table of activities

ND: not determined.

The compounds according to the invention, namely the compounds corresponding to formula (I), furthermore have good microbiological properties and are particularly suitable for use in preparing medicaments, in particular narrow-spectrum antibiotics for treating and/or preventing tuberculosis.

In particular, these antibiotics have antimicrobial action against M. tuberculosis for the treatment and/or prevention of tuberculosis. Thus, according to another of its aspects, a subject of the invention is medicaments that comprise a compound of formula (I), or an addition salt thereof with a pharmaceutically acceptable acid or base of the compound of formula (I).

These medicaments find their use in therapeutics, especially in the treatment and/or prevention of tuberculosis.

According to another of its aspects, the present invention relates to pharmaceutical compositions comprising, as active ingredient, a compound according to the invention. These pharmaceutical compositions contain an effective dose of at least one compound according to the invention, or a pharmaceutically acceptable salt of the said compound, and also at least one pharmaceutically acceptable excipient. The said excipients are chosen, according to the pharmaceutical form and the desired mode of administration, from the usual excipients which are known to those skilled in the art.

In the pharmaceutical compositions of the present invention for oral, sublingual, subcutaneous, intramuscular, intravenous, topical, local, intratracheal, intranasal, transdermal or rectal administration, the active principle of formula (I) above, or the salt thereof, may be administered in unit administration form, as a mixture with standard pharmaceutical excipients, to man and animals for the prevention or treatment of the above disorders or diseases.

The appropriate unit administration forms include oral forms, such as tablets, soft or hard gel capsules, powders, granules and oral solutions or suspensions, sublingual, buccal, intratracheal, intraocular and intranasal administration forms, forms of administration by inhalation, topical, transdermal, subcutaneous, intramuscular or intravenous administration forms, rectal administration forms, and implants. For topical application, the compounds according to the invention can be used in creams, gels, ointments or lotions.

By way of example, a unit administration form of a compound according to the invention in tablet form may comprise the following constituents: Compound according to the invention 50.0 mg

Mannitol 223.75 mg

Croscaramellose sodium 6.0 mg

Corn starch 15.0 mg

Hydroxypropylmethylcellulose 2.25 mg

Magnesium stearate 3.0 mg

There may be particular cases where higher or lower dosages are appropriate; such dosages do not depart from the context of the invention. According to the usual practice, the dosage appropriate for each patient is determined by the physician according to the method of administration and the weight and response of the said patient.

According to another of its aspects, the present invention relates to the use of the compounds of formula (I) for the prevention and/or treatment of bacterial infections caused by gram-positive microorganisms and mycobacteria.

According to another of its aspects, the present invention also relates to the use of the compounds of formula (I), or a pharmaceutically acceptable salt thereof, for the treatment and/or prevention of bacterial infections caused by mycobacteria such as M. tuberculosis, M. smegmatis, M. phlei, or other microorganisms such as Nocardia brasiliensis, Nocardia absessus or Corynebacterium diphtheria, for example.

Thus, one of the aspects of the invention concerns the use of the compounds of formula (I), or a pharmaceutically acceptable salt thereof, for the treatment and/or prevention of infectious diseases such as tuberculosis, leprosy, nocardiosis, diphtheria, pulmonary mycobacterial infection, cutaneous mycobacterial infection, atypic mycobacterial infection and mycobacteriosis.

The term "tuberculosis" includes infections caused by bacilli of the tuberculosis complex (M. tuberculosis, M. bovis and M. africanum) that are all pathogenic to man. Pulmonary tuberculosis is far and away the most frequent and the most widespread; this is tuberculosis of the lung, of the larynx, of the trachea and of the bronchi, tuberculosis of the intrathoracic lymphatic ganglions, pleural respiratory tuberculosis, primary respiratory tuberculosis and any other respiratory tuberculosis. Although less frequent, ganglionic tuberculosis and extrapulmonary tuberculosis, tuberculosis of the nervous system such as tuberculous meningitis, tuberculous leptomeningitis, cerebral tuberculomes and any other tuberculosis of the nervous system, or bone or joint tuberculosis, tuberculosis of the urogenital system, lymphadenopathic peripheral tuberculosis, intestinal tuberculosis, peritoneal tuberculosis and/or tuberculosis of the mesenteric glands, cutaneous tuberculosis and tuberculosis of the subcutaneous tissues, tuberculosis of the eye, of the ear or of the adrenal glands, and disseminated tuberculosis, also exist.

The term "leprosy" (Hansen's disease) includes infections caused by Mycobacterium leprae: indeterminate leprosy, tuberculoid leprosy, borderline leprosy, borderline tuberculoid leprosy, lepromatous leprosy, and also the other forms of leprosy.

The term "diphtheria" includes pharyngeal diphtheria, nasopharyngeal diphtheria, cutaneous diphtheria, and also the other forms of diphtheria.

The term "nocardiosis" includes pulmonary nocardiosis, cutaneous nocardiosis, and the other forms of nocardiosis.

According to another of its aspects, the present invention also relates to a method for treating the pathologies indicated above, which comprises the administration, to a patient, of an effective dose of a compound of formula (I).