Background of the Invention The present invention relates to phosphmate based derivatives which are inhibitors of matrix metalloproteinases or the production of tumor necrosis factor (TNF) and as such are useful in the treatment of a condition selected from the group consisting of arthritis, cancer, tissue ulceration, restenosis, penodontal disease, epidermolysis bullosa, sclentis and other diseases characterized by matrix metalloprotemase activity, AIDS, sepsis, septic shock and other diseases involving the production of TNF In addition, the compounds of the present invention may be used in combination therapy with standard non-steroidal anti-inflammatory drugs (hereinafter NSAID'S) and analgesics, and in combination with cytotoxic drugs such as adπamycin daunomycin, cis-platinim, etoposide, taxol, taxotere and other alkaloids, such as vincπstine, in the treatment of cancer This invention also relates to a method of using such compounds in the treatment of the above diseases in mammals, especially humans, and to pharmaceutical compositions useful therefor

There are a number of enzymes which effect the breakdown of structural proteins and which are structurally related metalloproteases Matrix-degrading metalloproteinases, such as gelatinase, stromelysin and collagenase, are involved in tissue matrix degradation (e g collagen collapse) and have been implicated in many pathological conditions involving abnormal connective tissue and basement membrane matrix metabolism such as arthritis (e g osteoarthritis and rheumatoid arthritis), tissue ulceration (e g corneal, epidermal and gastric ulceration), abnormal wound healing, penodontal disease, bone disease (e g Paget's disease and osteoporosis), tumor metastasis or invasion, as well as HIV-infection (J Leuk Biol , 52 (2) 244-248, 1992) Tumor necrosis factor is recognized to be involved in many infectious and auto¬ immune diseases (W Friers, FEBS Letters, 1991 , 285, 199) Furthermore, it has been shown that TNF is the pπme mediator of the inflammatory response seen in sepsis and septic shock (C E Spooner et al , Clinical Immunology and Immunopathology, 1992 62 S11 )

Summary of the Invention The present invention relates to a compound of the formula

or a pharmaceutically acceptable salt thereof, wherein

Ar is phenyl, pyπdyl, pyπmidinyl, pyrazmyl, pyndazinyl, thienyl, furyl, pyrrolyl, oxazolyl, thiazolyl, isoxazolyl, isothiazolyl or imidazolyl,

R ¹ and R ¹⁶ are each independently hydrogen, (C _r C ₆ )alkyl, (trιfluoromethyl) ₂ (C ₁ - C ₆ )alkyl, perfluoro(C,-C ₆ )alkyl, perfluoro(C ₁ -C ₆ )alkyl(C,-C ₆ )alkyl, difluoromethoxy, tnfluoromethoxy, (C ₃ -C ₇ )cycloalkyl(C ₁ -C _β )alkyl, (C ₆ -C ₁₀ )aryl(C C ₆ )alkyl, (C ₆ - C ₁₀ )aryloxy(C,-C ₆ )alkyl or (C ₆ -C ₁₀ )aryl(C ₁ -C ₆ )alkoxy(C,-C ₆ )alkyl, R ² is (C ₁ -C ₆ )alkyl or (C ₆ -C ₁₀ )aryl(C C ₆ )alkyl optionally substituted by hydroxy ammo, halo, (C.,-C ₆ )alkyl, (C^C^alkoxy, (trιfluoromethyl) ₂ (C,-C ₆ )alkyl, perfluoro(C,- C ₆ )alkyl, perfluoro(C ₁ -C ₆ )alkyl(C ₁ -C ₆ )alkyl, difluoromethoxy, tnfluoromethoxy, carboxy or carboxamoyl,

R ³ is (C,-C ₆ )alkyl or (C ₆ -C ₁₀ )aryl, R ⁴ is hydrogen, (C ₁ -C ₆ )alkyl, (C C ₆ )alkoxy, (C ₃ -C ₇ )cycloalkyl(C C _β )alkyl, (C,-

C ₆ )alkylsulfonyl, (C ₆ -C ₁₀ )aryl, (C ₆ -C ₁₀ )aryloxy, (C _β -C ₁₀ )arylsulfonyl, (C ₆ -C ₁₀ )aryl(C C ₆ )alkyl, (C ₆ -C ₁₀ )aryl (C _r C ₆ )alkoxy, (C _β -C ₁₀ )aryl(C C _β )alkylsulfonyl, N-phthahmido, (C ₆ - C arylNHCO, (C ₆ -C ₁₀ )arylNHSO ₂ , R ⁷ OOC, R ⁷ R ⁸ NCO, R ⁷ R ⁸ NSO ₂ wherein R ⁷ and R ⁸ are each independently hydrogen, (C,-C _β )alkyl or (C ₆ -C ₁₀ )aryl(C ₁ -C _β )alkyl, (C ₁ -C _β )alkyl CR ⁹ R ¹⁰ , (C ₆ -C ₁₀ )aryl CR ⁹ R ¹⁰ , (C ₆ -C ₁₀ )aryl(C ₁ -C ₆ )alkylCR ⁹ R ¹⁰ wherein R ⁹ and R ¹⁰ are each independently fluoro, (C,-C ₆ )alkyl or (C ₁ -C ₆ )alkoxy, or R ⁹ and R ⁰ may be taken together with the carbon to which they are attached to form a group of the formula

wherein a is 0, 1 or 2; b is 0 or 1 ; c is 1 , 2, or 3; d is 0 or 1 ; and e is 0, 1 or 2;

R ⁵ and R ⁶ are each independently hydrogen, (C C ₆ )alkyl, (C C ₆ )alkoxy, halo, (trifluoromethyl) ₂ (C ₁ -C ₆ )alkyl, perfluoro(C _r C ₆ )alkyl, perfluoro(C _l -C ₆ )alkyl(C ₁ -C ₆ )alkyl, difluoromethoxy, tnfluoromethoxy, (C,-C ₆ )alkylthio, (C,-C ₆ )alkylsulfinyl or (C _r C ₆ )alkylsulfonyl; or R ¹ and R ¹⁶ may be taken together with the carbon to which they are attached to form a (C ₃ -C ₇ )cycloalkyl group optionally substituted by (C^C^alkyl, (C _r C ₆ )alkoxy, (C ₆ -C ₁₀ )aryl(C _r C ₆ )alkyl, (C ₆ -C ₁₀ )aryl(C C ₆ )alkyl or (C ₆ -C ₁₀ )aryloxy; or R ⁵ and R ⁶ , when attached to adjacent carbon positions, may be taken together to form a group of the formula

wherein the broken lines represent optional double bonds; h is 1 or 2; f and g are each independently 0, 1 or 2;

Y and Z are each independently CH ₂ , O, CO, S0 ₂ , CH ₂ CH ₂ , CH ₂ 0, CH ₂ S, CH ₂ NH, CH ₂ CO, CH ₂ SO ₂ , NHCO or NHS0 ₂ ; and

R ¹¹ is hydrogen, halo, (C,-C ₆ )alkyl, (C C ₆ )alkoxy, (trifluoromethyl) ₂ (C _r C ₆ )alkyl, perfluoro(C,-C ₆ )alkyl, perfluoro(C ₁ -C ₆ )alkyl(C ₁ -C ₆ )alkyl, difluoromethoxy or tnfluoromethoxy, with the proviso that when either a or e is 0, the other must be 1 , with the proviso that when b and d are 1 , the sum of a, c and e cannot be 5, 6 or 7, with the proviso that when b and d are 0, the sum of a, c and e cannot be 7, with the proviso that the methyene carbon attached to the phosphorus atom must be attached to a carbon atom of the Ar ring, and with the proviso that R ⁵ and R ⁶ must be attached to carbon atoms of the Ar ring

The term "alkyl", as used herein, unless otherwise indicated, includes saturated monovalent hydrocarbon radicals having straight, branched or cyclic moieties or combinations thereof

The term "alkoxy", as used herein, includes O-alkyl groups wherein "alkyl" is defined above

The term "aryl", as used herein, unless otherwise indicated, includes an organic radical derived from an aromatic hydrocarbon by removal of one hydrogen, such as phenyl or naphthyl, optionally substituted by 1 to 3 substituents selected from the group consisting of fluoro, chloro, tπfluoromethyl, (C.,-C ₆ )alkoxy, (C ₆ -C ₁₀ )aryloxy, tnfluoromethoxy, difluoromethoxy and (C _r C ₆ )alkyl

The compound of formula I may have chiral centers and therefore exist in different enantiomeπc forms This invention relates to all optical isomers and stereoisomers of the compounds of formula I and mixtures thereof

Preferred compounds of formula I include those wherein Ar is phenyl or thienyl Other preferred compounds of formula I include those wherein R ¹ is 2- methylpropyl, trifluoromethylethyl, cyciopropylmethyl, cyciobutylmethyl, phenoxybutyl, cyclohexylmethyl, or phenylethyl

Other preferred compounds of formula I include those wherein R ² is (C _r C ₆ )alkyl or 4-methoxybenzyl. Other preferred compounds of formula I include those wherein R ³ is methyl

Other preferred compounds of formula I include those wherein R" is benzyl, 2- chlorobenzyl, 2-fluorobenzyl, 3-fluorobenzyl or 4-fluorobenzyl

More preferred compounds of formula I include those wherein Ar is phenyl or thienyl; R ¹ is 2-methylpropyl, trifluoromethylethyl, cyclopropylmethyl, cyclobutylmethyl, phenoxybutyl, cyclohexylmethyl or phenylethyl; R ² is (C,-C ₆ )alkyl or 4-methoxybenzyl,

R ³ is methyl and R ⁴ is benzyl, 2-chlorobenzyl, 2-fluorobenzyl, 3-fluorobenzyl or 4- fluorobenzyl

Specific preferred compounds of formula I include the following

(4-Benzylbenzyl)-[2-(2,2-dιmethyl-1-methylcarbamoyl-prop ylcarbamoyl)-4-methyl- pentyl]-phosphinιc acid,

(4-Benzylbenzyl-[2-(2,2-dιmethyl-1-methylcarbamoyl-propy lcarbamoyl)-5,5,5- trιfluoropentyl]-phosphιnιc acid,

[2-(2,2-Dιmethyl-1 -methylcarbamoyl-propylcarbamoyl)-4-methylpentyl]-[4-(3- fluorobenzyl)-benzyl]-phosphιnιc acid,

Benzyl-{2-[2-(4-methoxyphenyl )-1-methylcarbamoyl-ethylcarbamoyl]-6-phenoxy- hexyl}-phosphιnιc acid, (4-Benzylbenzyl)-{2-[2-(4-methoxyphenyl)-1-methylcarbamoyl-e thylcarbamoyl]-6- phenoxyhexyl}-phosphιnιc acid;

(4-Benzylbenzyl)-{3-cyclohexyl-2-[2-(4-methoxyphenyl)-1 -methylcarbamoy!- ethylcarbamoyl]-propyl}-phosphιnιc acid,

(4-Benzylbenzyl)-[3-cyclohexyl-2-(2 , 2-d i methyl- 1 -methylcarbam oyl- propylcarbamoyl)-propyl]-phosphιnιc acid,

(4-Benzylbenzyl)-[2-(2,2-dιmethyl-1-methylcarbamoyl-prop ylcarbamoyl)-4-phenyl- butyl]-phosphιnιc acid,

(4-Cyclohexylmethylbenzyl)-[2-(2, 2-d ιmethy I- 1 -methylca rba m oyl- propylcarbamoyl)-4-methyl-pentyl]-phosphιnιc acid, [2-(2,2-Dιmethyl-1 -methylcarbamoyl-propylcarbamoyl)-4-methylpentyl]-(4- ιsobutylbenzyl)-phosphιnιc acid,

[2-(2,2-Dιmethyl-1-methylcarbamoyl-propylcarbamoyl)-4-me thyipentyl]-[4-(4- fluoro-benzyl)-benzyl]-phosphιnιc acid,

[2-(2,2-Dιmethyl-1-methylcarbamoyl-propylcarbamoyl)-4-me thylpentyl]-[4-(2- fluoro-benzyl)-benzyl]phophιnιc acid;

(4-Benzylbenzyl)-{2-[2-(4-methoxyphenyl)-1-methylcarbamoy l-ethylcarbamoyl]-4- methyl-pentyl}-phosphιnιc acid,

[4-(2-Ch lorobenzyl)benzyl]-[2-(2,2-dιmethyl- 1 -methylcarba moyl-1 - propylcarbamoyl)-4-methylpentyl]phosphιnιc acid,

(5-Benzyl-pyrιdιn-2-ylmethyl)-[2-(2,2-dιmethyl- 1 -methylcarbamoyl- propylcarbamoyl)-4-methyl-pentyl]phosphιnιc acid, [2-(2,2-Dιmethyl-1-methylcarbamoyl-propylcarbamoyl)-5,5,5-t rιfluoro-pentyl]-[4-

(2-fluoro-benzyl)-benzyl]phosphιnιc acid,

[3-Cyclopropyl-2-(2,2-dιmethyl-1-methylcarbamoyl-propylc arbamoyl)-propyl]-[4- (2-fluoro-benzyl)-benzyl]phosphιnιc acid ,

[3-Cyclobutyl-2-(2,2-dιmethyl-1-methylcarbamoyl-propylca rbamoyl)-propyl]-[4- (2-fluoro-benzyl)-benzyl]-phosphιnιc acid, and

(5-Benzyl-thιophen-2-ylmethyl)-[2-(2,2-dιmethyl-1 -methylcarbamoyl- propylcarbamoyl)-4-methylpentyl]-phosphιnιc acid

The present invention also relates to a pharmaceutical composition for (a) the treatment of a condition selected from the group consisting of arthπtis, cancer, synergy with cytotoxic anticancer agents, tissue ulceration, macular degeneration, restenosis, penodontal disease, epidermolysis bullosa, scleπtis, in combination with standard NSAID'S and analgesics and other diseases characterized by matrix metalloproteinase activity, AIDS, sepsis, septic shock and other diseases involving the production of tumor necrosis factor (TNF) or (b) the inhibition of matrix metalloproteinases or the production of tumor necrosis factor (TNF) in a mammal, including a human, comprising an amount of a compound of formula I or a pharmaceutically acceptable salt thereof effective in such treatments and a pharmaceutically acceptable carrier

The present invention also relates to a method for the inhibition of (a) matrix metalloproteinases or (b) the production of tumor necrosis factor (TNF) in a mammal, including a human, comprising administering to said mammal an effective amount of a compound of formula I or a pharmaceutically acceptable salt thereof

The present invention also relates to a method for treating a condition selected from the group consisting of arthritis, cancer, synergy with cytotoxic anticancer agents, tissue ulceration, macular degeneration, restenosis, penodontal disease, epidermolysis bullosa, sdentis, in combination with standard NSAID'S and analgesics and other diseases characterized by matrix metalloproteinase activity, AIDS, sepsis, septic shock and other diseases involving the production of tumor necrosis factor (TNF) in a mammal, including a human, comprising administering to said mammal an amount of

a compound of formula I or a pharmaceutically acceptable salt thereof effective in treating such a condition

Detailed Description of the Invention The following reaction Schemes illustrate the preparation of the compounds of the present invention Unless otherwise indicated R', R ² , R ³ , R\ R ⁵ , R ⁶ and Ar in the reaction Schemes and the discussion that follow are defined as above

10

20

IV

30

III

SCHEME 1 (continued)

III

10

15

20

SCHEME 2

15

20

30

In reaction 1 of Scheme 1, the compound of formula VI is converted to the corresponding (2-benzyloxycarbonyl)phosphιnιc acid compound of formula V by reacting VI with bis-tπmethylsilylphosphonite in an aprotic solvent, such as methylene chloride The reaction mixture is stirred at room temperature for a time period between about 8 hours to about 48 hours, preferably about 18 hours

In reaction 2 of Scheme 1, the compound of formula V is converted to the corresponding compound of formula IV by reacting V with an arylmethylhalide of the formula

and N,0-bιs(tπmethylsιlyl)acetamιde in an inert aprotic solvent, such a methylene chloride The reaction mixture is stirred at room temperature or heated to reflux for a time period between about 18 hours to about 72 hours, preferably about 24 hours An excess of tπmethylsilyldiazomethane in a 7 3 ratio mixture of toluene and methanol is then added to the crude reaction product so formed for a time period between about 15 minutes to about 2 hours, preferably about 30 minutes

In reaction 3 of Scheme 1, the compound of formula IV is converted to the corresponding compound of formula III by (1 ) hydrogenating IV in the presence of a catalyst, such 5% palladium on barium sulfate, and a protic solvent, such as methanol under a pressure between about 30 psi to about 60 psi, preferably about 45 psi, for a time period between about 15 minutes to about 3 hours, preferably about 1 hour, (2) reacting the intermediate so formed with hydroxysuccinimide and 2-dιethylamιnoethyl propyl carbodiimide hydrochlonde in a polar aprotic solvent, such as dimethylformamide, at room temperature, for a time period between about 8 hours to about 48 hours, preferably about 20 hours, and (3) reacting the 2,5-dιoxo-pyrrohdιn-1-y! intermediate so formed with an amine of the formula

In an aprotic solvent, such as methylene chloride, at room temperature, for a time period between about 16 hours to about 48 hours, preferably about 18 hours.

In reaction 4 of Scheme 1, the compound of formula III is converted to the corresponding compound of formula I by treating III with 10% aqueous trifluoroacetic acid The reaction mixture is stirred, at room temperature, for a time period between about 30 minutes to about 24 hours, preferably about 2 hours

Scheme 2 presents an alternative method for preparing a compound of formula IV. In reaction 1 of Scheme 2, the compound of formula V is converted to the corresponding compound of formula VIII by reacting V with 2-(tπmethylsιlyl) ethoxymethyl chloride and N,O-bis(tπmethylsιlyl)acetamιde in an inert aprotic solvent, such as methylene chloride The reaction mixture is stirred at a temperature between about 20°C to about 40°C, preferably about 25°C, for a time period between about 8 hours to about 48 hours, preferably about 18 hours An excess of tπmethylsilyl- diazomethane in a 7:3 ratio mixture of toluene and methanol is then added to the crude reaction product so formed for a time period between about 15 minutes to about 2 hours, preferably about 30 minutes

In reaction 2 of Scheme 2, the compound of formula VIII is converted to the corresponding compound of formula VII by reacting VIII with boron trifiuoride diethyl etherate in a inert aprotic solvent, such as methylene chloride The reaction mixture is stirred at a temperature between about 0°C to about 40°C, preferably about 25°C, for a time period between about 1 hour to about 8 hours, preferably about 3 hours

In reaction 3 of Scheme 2, the compound of formula VII is converted to the corresponding compound of formula VI by reacting VII with carbon tetrabromide in the presence of triphenylphosphine and diethyl azodicarboxylate in an inert aprotic solvent, such as methylene chloride The reaction mixture is stirred at a temperature between

about 0°C to about 40°C, preferably about 25°C, for a time period between about 2 hours to about 24 hours, preferably about 4 hours

In reaction 4 of Scheme 2, the compound of formula VI is converted to the corresponding compound of formula IV by reacting VI with an arylhalide of the formula

wherein X is bromo or lodo, in the presence of n-butyl lithium and copper (1) iodide in an inert aprotic solvent, such as tetrahydrofuran The reaction mixture is stirred at a temperature between about -70°C to about 60°C, preferably about 0°C, for a time period between about 1 hour to about 48 hours, preferably about 18 hours

Pharmaceutically acceptable salts of the acidic compounds of the invention are salts formed with bases, namely cationic salts such as alkali and alkaline earth metal salts, such as sodium, lithium, potassium, calcium, magnesium, as well as ammonium salts such as ammonium, tπmethyl-ammσnium, diethylammonium, and tπs-

(hydroxymethyl)-methylammonιum salts

Similarly acid addition salts, such as of mineral acids, organic carboxylic and organic sulfonic acids e g hydrochloric acid, methanesulfonic acid, maleic acid, are also possible provided a basic group, such as pyndyl, constitutes part of the structure The ability of the compounds of formula I or their pharmaceutically acceptable salts (hereinafter also referred to as the compounds of the present invention) to inhibit matrix metalloproteinases or the production of tumor necrosis factor (TNF) and consequently, demonstrate their effectiveness for treating diseases characterized by matrix metalloproteinase or the production of tumor necrosis factor is shown by the following vitro assay tests

Bioloqical Assay Inhibition of Human Collagenase (MMP-1 ) Human recombmant collagenase is activated with trypsin using the following ratio 10 μg trypsin per 100 μg of collagenase The trypsin and collagenase are incubated at room temperature for 10 minutes then a five fold excess (50 μg/10 μg trypsin) of soybean trypsin inhibitor is added

10 mM stock solutions of inhibitors are made up in dimethyl sulfoxide and then diluted using the following Scheme

10 mM > 120 μ > 12 μM > 1 2 μM > 0 12 μM Twenty-five micro ters of each concentration is then added in triplicate to appropriate wells of a 96 well microfluor plate The final concentration of inhibitor will be a 1 4 dilution after addition of enzyme and substrate Positive controls (enzyme no inhibitor) are set up in wells D1-D6 and blanks (no enzyme, no inhibitors) are set in wells D7-D12 Collagenase is diluted to 400 ng/ml and 25 μ\ is then added to appropriate wells of the microfluor plate Final concentration of collagenase in the assay is 100 ng/ml Substrate (DNP-Pro-Cha-Gly-Cys(Me)-Hιs-Ala-Lys(NMA)-NH ₂ ) is made as a 5 mM stock in dimethyl sulfoxide and then diluted to 20 μ\\Λ in assay buffer The assay is initiated by the addition of 50 μ\ substrate per well of the microfluor plate to give a final concentration of 10 μM

Fluorescence readings (360 nM excitation 460 nm emission) were taken at time 0 and then at 20 minute intervals The assay is conducted at room temperature with a typical assay time of 3 hours

Fluorescence vs time is then plotted for both the blank and collagenase containing samples (data from triplicate determinations is averaged) A time point that provides a good signal (the blank) and that is on a linear part of the curve (usually around 120 minutes) is chosen to determine IC ₅₀ values The zero time is used as a blank for each compound at each concentration and these values are subtracted from the 120 minute data Data is plotted as inhibitor concentration vs % control (inhibitor fluorescence divided by fluorescence of collagenase alone x 100) IC ₅₀ 's are determined from the concentration of inhibitor that gives a signal that is 50% of the control

If IC ₅₀ 's are reported to be <0 03 μM then the inhibitors are assayed at concentrations of 0 3 μM, 0 03 μM, 0 03 μM and 0 003 μM

Inhibition of Gelatinase (MMP-2) Inhibition of gelatinase activity is assayed using the Dnp-Pro-Cha-Gly-Cys(Me)- Hιs-Ala-Lys(NMA)-NH ₂ substrate (10 μM) under the same conditions as inhibition of human collagenase (MMP-1)

72kD gelatinase is activated with 1 mM APMA (p-aminophenyi mercuric acetate) for 15 hours at 4°C and is diluted to give a final concentration in the assay of 100 ng/ml Inhibitors are diluted as for inhibition of human collagenase (MMP-1 ) to give final concentrations in the assay of 30 μM, 3 μM 0 3 μM and 0 03 μM Each concentration is done in triplicate

Fluorescence readings (360 nm excitation, 460 emission) are taken at time zero and then at 20 minutes intervals for 4 hours

IC ₅₀ 's are determined as per inhibition of human collagenase (MMP-1 ) If IC ₅₀ 's are reported to be less than 0 03 μM, then the inhibitors are assayed at final concentrations of 0 3 μM, 0 03 μM, 0 003 μM and 0 003 μM

Inhibition of Stromelysin Activity (MMP-3) Inhibition of stromelysin activity is based on a modified spectrophotometnc assay described by Weingarten and Feder (Weingarten, H and Feder, J Spectrophotometnc Assay for Vertebrate Collagenase, Anal Biochem 147, 437-440 (1985)) Hydrolysis of the thio peptolide substrate [Ac-Pro-Leu-Gly-

SCH[CH ₂ CH(CH ₃ ) ₂ ]CO-Leu-Gly-OC ₂ H ₅ ] yields a mercaptan fragment that can be monitored in the presence of Ellman's reagent

Human recombinant prostromeiysin is activated with trypsin using a ratio of 1 μ\ of a 10 mg/ml trypsin stock per 26 μg of stromelysin The trypsin and stromelysin are incubated at 37°C for 15 minutes followed by 10 l of 10 mg/ml soybean trypsin inhibitor for 10 minutes at 37°C for 10 minutes at 37°C to quench trypsin activity

Assays are conducted in a total volume of 250 μ\ of assay buffer (200 mM sodium chloride, 50 mM MES, and 10 mM calcium chloride, pH 6 0) in 96-well microhter plates Activated stromelysin is diluted in assay buffer to 25 g/ml Ellman's reagent

(3-Carboxy-4-nιtrophenyl disulfide) is made as a 1 M stock in dimethyl formamide and diluted to 5 mM in assay buffer with 50 μ\ per well yielding at 1 mM final concentration

10 mM stock solutions of inhibitors are made in dimethyl sulfoxide and diluted serially in assay buffer such that addition of 50 μL to the appropriate wells yields final concentrations of 3 μM, 0 3 μM, 0 003 μM, and 0 0003 μM All conditions are completed in triplicate. A 300 mM dimethyl sulfoxide stock solution of the peptide substrate is diluted to 15 mM in assay buffer and the assay is initiated by addition of 50 μ\ to each well to give a final concentration of 3 mM substrate Blanks consist of the peptide substrate and Ellman's reagent without the enzyme Product formation was monitored at 405 nm with a Molecular Devices UVmax plate reader IC ₅₀ values were determined in the same manner as for collagenase

Inhibition of MMP-13 Human recombinant MMP-13 is activated with 2mM APMA (p-aminophenyl mercuric acetate) for 1 5 hours, at 37°C and is diluted to 400 ng/ml in assay buffer (50 mM Tris, pH 7 5, 200 mM sodium chloride, 5mM calcium chloride, 20μM zinc chloride 0 02% bnj) Twenty-five microliters of diluted enzyme is added per well of a 96 well microfluor plate The enzyme is then diluted in a 1 4 ratio in the assay by the addition of inhibitor and substrate to give a final concentration in the assay of 100 ng/ml

10 mM stock solutions of inhibitors are made up in dimethyl sulfoxide and then diluted in assay buffer as per the inhibitor dilution scheme for inhibition of human collagenase (MMP-1 ) Twenty-five microliters of each concentration is added in triplicate to the microfluor plate The final concentrations in the assay are 30 μM, 3μM 0 3 μM, and 0 03 μM

Substrate (Dnp-Pro-Cha-Gly-Cys(Me)-Hιs-Ala-Lys(NMA)-NH ₂ ) is prepared asfor inhibition of human collagenase (MMP-1 ) and 50 μ\ is added to each well to give a final assay concentration of 10 μM Fluorescence readings (360 nM excitation, 450 emission) are taken at time 0 and every 5 minutes for 1 hour

Positive controls consist of enzyme and substrate with no inhibitor and blanks consist of substrate only

IC ₅₀ 's are determined as per inhibition of human collagenase (MMP-1 ) If IC ₅₀ s are reported to be less than 0 03 μM, inhibitors are then assayed at final concentrations of 0 3 μM, 0 03 μM, 0 003 μM and 0 0003 μM

Inhibition of TNF Production The ability of the compounds or the pharmaceutically acceptable salts thereof to inhibit the production of TNF and, consequently, demonstrate their effectiveness for treating diseases involving the production of TNF is shown by the following in vitro assay

Human mononuclear cells were isolated from anti-coagulated human blood using a one-step Ficoll-hypaque separation technique (2) The mononuclear cells were washed three times in Hanks balanced salt solution (HBSS) with divalent cations and resuspended to a density of 2 x 10 ⁶ /ml in HBSS containing 1 % BSA. Differential counts determined using the Abbott Cell Dyn 3500 analyzer indicated that monocytes ranged from 17 to 24% of the total cells in these preparations

180 /I of the cell suspension was aliquoted into flate bottom 96 well plates (Costar). Additions of compounds and LPS (100ng/ml final concentration) gave a final volume of 200 I All conditions were performed in triplicate After a four hour incubation at 37 ^C C in an humidified C0 ₂ incubator, plates were removed and centπfuged (10 minutes at approximately 250 x g) and the supernatants removed and assayed for TNFσ using the R&D ELISA Kit

For administration to mammals, including humans, for the inhibition of matrix metalloproteinases or the production of tumor necrosis factor (TNF), a variety of conventional routes may be used including orally, parenterally and topically. In general, the active compound will be administered orally or parenterally at dosages between about 0.1 and 25 mg/kg body weight of the subject to be treated per day, preferably from about 0.3 to 5 mg/kg. However, some variation in dosage will necessarily occur depending on the condition of the subject being treated The person responsible for administration will, in any event, determine the appropriate dose for the individual subject

The compounds of the present invention can be administered in a wide variety of different dosage forms In general, the therapeutically effective compounds of this invention are present in such dosage forms at concentration levels ranging from about 5.0% to about 70% by weight.

For oral administration, tablets containing various excipients such as microcrystalline cellulose, sodium citrate, calcium carbonate, dicalcium phosphate and glycine may be employed along with various disintegrants such as starch (and

preferably corn, potato or tapioca starch), alginic acid and certain complex silicates together with granulation binders like polyvinylpyrro done, sucrose, gelation and acacia Additionally, lubricating agents such as magnesium stearate, sodium lauryl sulfate and talc are often very useful for tabletting purposes Solid compositions of a similar type may also be employed as fillers in gelatin capsules, preferred materials in this connection also include lactose or milk sugar as well as high molecular weight polyethylene glycols When aqueous suspensions and/or elixirs are desired for oral administration, the active ingredient may be combined with various sweetening or flavoring agents, coloring matter or dyes, and, if so desired, emulsifying and/or suspending agents as well, together with such diluents as water, ethanol, propylene glycol, glycerin and various like combinations thereof In the case of animals, they are advantageously contained in an animal feed or drinking water in a concentration of 5- 5000 ppm, preferably 25 to 500 ppm

For parenteral administration, e g , for intramuscular, intrapentoneal, subcutaneous and intravenous use, a sterile injectable solution of the active ingredient is usually prepared Solutions of a therapeutic compound of the present invention in either sesame or peanut oil or in aqueous propylene glycol may be employed The aqueous solutions should be suitably adjusted and buffered, preferably at a pH of greater than 8, if necessary and the liquid diluent first rendered isotonic These aqueous solutions are suitable for intravenous injection purposes The oily solutions are suitable for intraarticular, intramuscular and subcutaneous injection purposes The preparation of all these solutions under sterile conditions is readily accomplished by standard pharmaceutical techniques well known to those skilled in the art In the case of animals, compounds can be administered intramuscularly or subcutaneously at dosage levels of about 0 1 to 50 mg/kg/day, advantageously 0 2 to 10 mg/kg/day given in a single dose or up to 3 divided doses

The present invention is illustrated by the following examples, but it is not limited to the details thereof

Example 1 S.S and R.S (4-Benzylbenzvθr2-(2.2-dimethyl-1 -methylcarbamoyl propylcarbamoyl -methylpentyllphosphinic acid

Step A 4-Benzoylbenzyl bromide (2 75 grams, 10 0 mmole) and tπethylsilane (2 33 grams, 20 mmole) in trifluoroacetic acid (4 56 grams, 40 mmole)

were warmed to 60 ^D C for 18 hours The cooled mixture was diluted with ethyl acetate (50 ml) and carefully washed with saturated sodium bicarbonate solution (2 x 50 ml) After drying with magnesium sulfate, the extract was filtered and concentrated The residue was chromatographed (0 5 99 5 to 2 98 - ethyl acetate hexane) to give 1 37 grams (52%) of 4-benzylbenzyl bromide as a colorless

Step B (2-Benzyloxycarbonyl-4 -methylpentyl)phosphιnιc acid (1 14 grams, 4 0 mmole), 4-benzylbenzyl bromide (1 31 grams, 5 0 mmole) and N,0-bιs(tπmethylsιlyl) acetamide (2 44 grams, 12 mmole) were combined in dry methylene chloride (40 ml), the mixture was degassed with a stream of dry nitrogen then stirred at room temperature for 18 hours and refluxed for 24 hours The cooled solution was quenched with 1 N hydrochloric acid (25 ml) The methylene chloride layer was separated and washed with 1 N hydrochloric acid (2 x 25 ml), dried with magnesium sulfate, filtered and concentrated to a turbid oil This was dissolved in methanol (10 ml) / toluene (40 ml) and treated with excess tπmethylsilyldiazomethane (commercial hexane solution) After 30 minutes the excess tπmethylsilyldiazo-methane was destroyed with acetic acid The solution was concentrated to an oil which was chromatographed (75 25 - ethyl acetate hexane) to give 1 18 grams (62%) of 2-[(4-benzylbenzyl)methoxyphosphιnoylmethyl]-4-methylpentan oιc acid benzyl ester as a colorless oil

Step C 2-[(4-Benzyl benzyl)methoxyphosphιnoylmethylj- 4-methylpentanoιc acid benzyl ester (650 mg, 1 36 mmole) was hydrogenated at 45 psi at room temperature in methanol (50 ml) over 5% palladium on barium sulfate (650 mg) for 1 hour The catalyst was filtered off and washed with methanol The filtrate was concentrated and traces of methanol removed by twice diluting the sample with methylene chloride and reconcentrating The intermediate 2-[(4-benzyl benzyl)methoxyphosphιnoylmethyl]-4-methylpentanoιc acid was dissolved in dry dimethylformamide (14 ml) and hydroxysuccinimide (235 mg, 2 04 mmole) and dimethylaminopropylethylcarbodiimide hydrochlonde (391 mg, 2 04 mmol) added After stirring at room temperature for 20 hours the solution was diluted with ether (50 ml) and washed with 1 N hydrochloric acid (50 ml, 2 x 25 ml) and saturated sodium bicarbonate solution (25 ml) and dried with magnesium sulfate After

filtration and concentration 566 mg (86%) of 2-[(4-Benzylbenzyl) methoxyphosphιnoylmethyl]-4- methyl-pentanoic acid 2,5-dιoxo-pyrrolιdιn-1-yl ester was obtained as an oil

Step D 2-[(4-Benzylbenzyl)methoxyphosphιnoylmethyl]-4-methylpentan oιc acid 2,5-dιoxo-pyrrolιdιn-1-yl ester (120 mg, 0.25 mmole),

(S)-2-amιno-3,3,N-trιmethylbutyramιde hydrochlonde (25 mg, 0 30 mmole) and diisopropylethylamine (39 mg, 0 30 mmole) were combined and stirred together for 18 hours at room temperature in dry methylene chloride (10 ml) Additional (S)-2-amιno-3,3,N-trιmethylbutyramιde hydrochlonde (25 mg, 0 30 mmole) and diisopropylethylamine (39 mg, 0 30 mmole) were added to the reaction mixture After four days the solution was washed with 1 N hydrochloric acid (2 x 10 ml) and saturated sodium bicarbonate solution (2 x 10 ml) and dried with magnesium sulfate After filtration and concentration the residue was chromatographed (3 97 - methanol chloroform) to give 77 mg (60%) of (4-Benzylbenzyl)-[2-(2,2- dιmethyl-1 -methyl carbamoylpropylcarbamoy!)-4-methylpentyl]-phosphιnιc acid methyl ester

Step E (4-Benzylbenzyl)-[2-(2,2-dιmethy!-1 -methyl carbamoylpropylcarbamoyl)-4-methylpentyl]-phosphιnιc acid methyl ester (77 mg, 0 15 mmole) was dissolved in 10% aqueous trifluoroacetic acid (6 ml) After 4 hours at room temperature the reaction mixture was concentrated Residual water was removed by twice diluting the sample with toluene and reconcentrating to give 75 mg (100%) of the title compound as a hard glass which was a 63 37 mixture of S,S and R,S isomers, respectively Mass spectrum m/e M ⁺ +1 501 , M ⁺ +Na ⁺ 523, M ⁺ +K ⁺ 540, M ⁺ +2Na ⁺ 555 HPLC retention times 13 00/15 90 minutes

The compounds in Tables 1-4 were prepared by a method analogous to that described in in Example 1

R ¹ R ² R ¹² _R ,3 R ¹⁴ R ¹

S/R isobutyl 4-methoxybenzyl H phenyl H 50/50

isobutyl 4-methoxybenzyl phenyl H H 52/48

isobutyl 4-methoxybenzyl H H phenyl 51/49

isobutyl 4-methoxybenzyl H H methoxy 59/41

EX R ¹ R ² R' ² _R ,3 R' ⁴ R ¹ Ret. Time MS S/R

25 isobutyl methyl H H H 48/52 2.22/3.10 CI:

369 M ⁺

370 MAH ⁺

26 isobutyl tert-butyl H H H 51/49 10.05/11.63 CI:

411 MAH ⁺

428 M ⁺ +NH ₄ + ⁺

27 phenethyl tert-butyl H H H 62/38 6.91/10/51 CI:

459 M ⁺

460 M ⁺ +NH ₄ ⁺

28 trans 4-methyl- tert-butyl H H H 50/50 16.08/17.54 CI: cyclohexylmethyl 465 MAH ⁺ ro

466 M ⁺ +2H

29 trans 4-methyl 4-methoxybenzyl H H H 50/50 14.54/15/91 CI: cyclohexylmethyl 529 MAH ⁺

30 trans 4-methyl- methyl H H H 100/0 1 1.59/- CI: cyclohexylmethyl 530 MA2H ⁺

31 isobutyl 4-methoxybenzyl H H isobutyl 50/50 15.85/17/45 LSIMS: 423 MAH ⁺

32 isobutyl tert-butyl H H isobutyl 50/50 13/46/16.64 LSIMS: 531 MAH ⁺

33 isobutyl methyl H H isobutyl 45/55 11.31/13.34 LSIMS: 425 MAH ⁺ 447 MANa+

Table 2

r

10

10

Table 3

15 r c

Ex Y Z R ¹ R ¹ Ret. Time MS

S/R

62 -CH ₂ - -CH ₂ CH ₂ - isobutyl 49/51 14.15/17.08 CI:

527 MAH ^*

63 -CH ₂ - -CH ₂ O- isobutyl 53/47 1 1.19/14.23 Cl:

529 MAH ⁺

20

Table 4

Example 65 S.S and R,S (4-Benzoylaminobenzyl)-(2-r2-(4-methoxyphenyl)-1- methylcarbamoylethylcarbamovn -4-methylpentyl>phosphinic acid.

Step A 2-[Methoxy(4-nιtrobenzyl) phosphιnoylmethyl]-4-methylpentanoιc acid benzyl ester (prepared from 4-nιtrobenzyl bromide and (2-benzyloxycarbonyl-4- methylpentyl)phosphιnιc acid by the procedure described in Example 1/Step B) (900 mg, 2 08 mmole) in a mixture of ethanol (25 ml) and water (6 ml) was treated with concentrated hydrochloric acid (3 drops) and iron powder (1 14 grams, 20 mmole) at reflux After 2 hours the cooled mixture was filtered through diatomaceous earth The filtrate was concentrated and the residue chromatographed (ethyl acetate) to give 444 mg (53%) of 2-[(4-Amιnobenzyl) methoxyphosphιnoylmethyl]-4- methylpentanoic acid benzyl ester as a yellow oil

Step B 2-[(4-Amιnobenzyl)methoxyphosphιnoylmethyl]-4-methylpentan oιc acid benzyl ester (230 mg, 0 57 mmole), benzoyl chloride (96 mg, 0 68 mmole), and tnethylamine (69 mg, 0 68 mmole) were combined in cold (ice bath) chloroform (10 ml) After stirring for 1 hour at ice bath temperature the reaction mixture was diluted with chloroform (150 ml) and washed with water (20 ml), 1 N hydrochloric acid (2 x 20 ml) and saturated sodium bicarbonate solution (2 x 20 ml) and dried with magnesium sulfate After filtration and concentration the yellow residue was chromatographed (ethyl acetate) to give 190 mg (66%) of 2-[(4-Benzoylamιno- benzyl)methoxy phosphιnoylmethyl]-4- methylpentanoic acid benzyl ester as a light yellow oil

Step C 2-[(4-Benzoylamιnobenzyl)methoxy phosphιnoylmethyl]-4- methylpentanoic acid benzyl ester (226 mg, 0 44 mmole) was hydrogenated hydrogenated at 50 psi at room temperature in methanol (20 ml) over 5% palladium on carbon (300 mg) for 2 hours The catalyst was filtered off and washed with methanol The filtrate was concentrated to give 154 mg (83%) of 2-[(4-benzoyl- amιnobenzyl)methoxyphosphιnoylmethyl]-4-methylpentanoιc acid as an oil Step D 2-[(4-Benzoylamιnobenzyl)methoxyphosphιnoy! methyl]-4-methylpentanoιc acid (154 mg, 0 37 mmole),

(S)-2-amιno-3-(4-methoxyphenyl)-N- methylpropionamide (100 mg 0 41 mmole) benzotrιazol-1-yloxy -trιs(dιmethylamιno)phosphonιum hexafluorophosphate (180 mg, 0 41 mmole) and diisopropylethylamine (238 mg 1 85 mmole) were stirred together in dry methylene chloride (10 ml) for 18 hours The reaction mixture was

concentrated and diluted with ethyl acetate (100 ml). This solution was washed with 1 N hydrochloric acid (20 ml) and saturated sodium bicarbonate solution (20 ml) and dried with magnesium sulfate Filtration and concentration gave the crude product which was purified by chromatography (10:90 - methanohmethylene chloride) yielding 153 mg (68%) of (4-Benzoylamino benzyl){2-[2-(4-methoxyphenyl)

-1 -methylcarbamoylethylcarbamoyl]-4-methylpentyl} phosphinic acid methyl ester as a white solid.

Step E: By the procedure described in Example 1/Step E (4-Benzoylamino benzy!){2-[2-(4-methoxyphenyl) -1-methylcarbamoylethylcarbamoyl]-4-methylpentyl} phosphinic acid methyl ester (153 mg, 0.25 mmole) was converted to 100 mg (67%) the title compound, a white solid which was a 50:50 mixture of S,S and R,S isomers, respectively. Mass spectrum m/e: MAH ⁺ 594, M ⁺ +Na ^* 616 HPLC retention times: 8.32/10.33 minutes.

The compounds in Table 5 were prepared by a method analogous to that described in Example 65.

Table 5

EX R ¹ R ¹² _R ,3 _R 14 R ¹ Ret. Time MS S/R

70 isobutyl benzamido H H 66/34 8.80/1 1.30 594 MAH ⁺ 616 MANa ⁺

71 isobutyl acetamido H H 51/49 11.98/13.82 594 MAH ⁺ 616 MANa ⁺

72 isobutyl H phenylsulfonyl- H 51/49 16.38/17.35 652 M ⁺ +Na ⁺ amino

Example 73 S,S and R.S r4-(1.3-Dioxo-1 ,3-dihvdroisoindol-2-yl)benzvn (2-r2-(4-methoχyphenyl)-1 -methyl carbamoylethylcarbamoyll-4-methylpentyl) phosphinic acid Step A 2-[(4-Amιnobenzyl)methoxyphosphιnoylmethyl]-4-methylpentan oιc acid benzyl ester (prepared as described in Example 2/Step A) (242 mg, 0 60 mmole) and phtha c anhydride (133 mg, 0 90 mmole) in acetic acid (10 ml) were refluxed for 1 hour The cooled reaction mixture was concentrated and the residue dissolved in ethyl acetate (100 ml) This solution was washed with saturated sodium bicarbonate solution (3 x 20 ml) and dried with magnesium sulfate Filtration and concentration gave a light yellow oil which was purified by chromatography (ethyl acetate) yielding 162 mg (51 %) of 2-{[4-(1 ,3-dιoxo-1 ,3- dιhydroιsoιndol-2-yl)benzyl] methoxyphosphinoyi methyl}-4-methylpentanoιc acid benzyl ester as a yellow solid Step B By the procedures described in Example 2/Steps C-E 2-{[4-(1 ,3-dιoxo-1 ,3-dιhydroιsoιndol-2-yl)benzyl] methoxyphosphinoyi methyl}-4-methylpentanoιc acid benzyl ester (269 mg, 0 50 mmole) was converted to 61 mg (20% - 3 steps) of the title compound, a white solid which was a 50 50 mixture of S,S and R,S iso ers, respectively Mass spectrum m/e MAH ⁺ 620, MANa ⁺ 642 HPLC retention times 10 12/11 92 minutes

The compounds in Table 6 were prepared by a method analogous to that described in Example 73

R ¹ R ¹² _R 13 R ¹⁴ R ¹ Ret Time MS CO

EX en

S/R

74 isobutyl H H phthalimide 50/50 10 12/1 1 92 LSIMS 620 MAH ⁺ 642 MANa ⁺

75 isobutyl H phthalimide H 46/54 10 58/12 65 LSIMS 620 MAH ⁺ 642 MANa ⁺

76 isobutyl phthalimide H H 54/46 1 1 44/14 67 LSIMS 620 M ⁺ +H ⁺ 642 MANa ⁺

Example 77 S,S and R.S (3-AminobenzylH2-r2-(4-methoxyphenyl)- 1 -methylcarbamoylethylcarbamoyl -methylpentvDphosphinic acid.

Step A {2-[2-(4-Methoxyphenyl)-1 -methylcarbamoylethylcarbamoyl]-4-methyl- pentyl}-[3-(2,2,2-trιfluoroacetylamιno)benzyl]phosphιnιc acid methyl ester (prepared from the appropriate starting materials using the procedures described in Example 2/Steps A-D) (105 mg, 0 18 mmole) was treated with potassium carbonate (242 mg 1 75 mmole) in 10% aqueous methanol (10 ml) for 18 hours 1 N Sodium hydroxide (1 ml) was added and after 3 hours the reaction mixture was concentrated and ethyl acetate (25 ml) and water (5 ml) added The ethyl acetate layer was removed and the water extracted with ethyl acetate (3 x 20 ml) The combined ethyl acetate extracts were dried with magnesium sulfate and filtered The filtrate was concentrated to give 56 mg (64%) of (3-amιnobenzyl){2-[2-(4-methoxy phenyl)-1-methylcarbamoylethyl carbamoyl]-4-methylpentyl}phosphmιc acid methyl ester as a light yellow oil

Step B By the procedure described in Example 1/Step E (3-amιnobenzyl){2-[2-(4-methoxy phenyl)-1 -methylcarbamoylethyl carbamoyl]-4-methylpentyl}phosphιnιc acid methyl ester (56 mg, 0 1 1 mmole) was converted to 40 mg (74%) of the title compound, a white solid which was a 44 56 mixture of S,S and R,S isomers, respectively Mass spectrum m/e MAH ⁺ 490 HPLC retention times (20% to 80% gradient) 6 17/8 94 minutes

Example 78 S.S and R.S (3-Benzylaminobenzyl_-f2-r2- (4-methoxyphenyl)- 1-methylcarbamoylethylcarbamovn-4-methylpentyl>phosphinic acid. Step A (3-Amιnobenzyl){2-[2-(4-methoxyphenyl)-1 -methylcarbamoyl ethylcarbamoyl]-4-methylpentyl}phosphιnιc acid methyl ester (prepared as described in Example 4/Step A) (150 mg, 0 30 mmole), benzaldehyde (38 mg, 0 36 mmole), sodium cyanoborohydnde (23 mg, 0 357 mmole) and acetic acid (1 drop) in methanol were stirred at room temperature for 3 hours The reaction was quenched with 1 N hydrochloric acid (few mi's) and the reaction mixture concentrated The residue was dissolved in ethyl acetate (20 ml) and washed with 1 N hydrochloric acid (20 ml), saturated sodium bicarbonate solution (20 ml) and dried with magnesium sulfate Filtration and concentration gave the crude product which was purified by chromatography (3 97 - methanol methylene chloride) yielding 133 mg (75%) of

(3-Benzylamιno benzyl)-{2-[2-(4-methoxyphenyl)-1 - methylcarbamoylethylcarbamoyl] -4-methylpentyl} phosphinic acid methyl ester as an oil

Step B By the procedure described in Example 1/Step E (3-Benzylamιno benzyl)-{2-[2-(4-methoxyphenyl)-1- methylcarbamoylethylcarbamoyl]-4-methylpentyl} phosphinic acid methyl ester (133 mg, 0 22 mmole) was converted to 100 mg (64%) of the title compound, a white solid which was a 67 33 mixture of S,S and R,S isomers, respectively Mass spectrum m/e MAH ⁺ 580, MANa ⁺ 602 HPLC retention times 7.29/9 61 minutes

Example 79 Separation of S,S and R.S (4-benzylbenzyl)r2-(2,2-dimethyl

-1 -methylcarbamoylpropylcarbamovI - methylpentyllphosphinic acid

A mixture of S,S and R,S (4-benzylbenzyl)[2-(2,2-dιmethyl- 1-methylcarbamoylpropylcarbamoyl)-4-methylpentyl]phosphιnι c acid (prepared as described in Example 1 ) (609 mg) was chromatographed on a preparative reverse phase (C-18) column eluting first with 40% aqueous acetonitnle containing 0 1% trifluoroacetic acid and then with 50% aqueous acetonitnle containing 0 1 % trifluoroacetic acid This gave nearly complete separation of the two diastereomers Concentration of the fractions containing the two pure components gave 304 mg of S,S (4-benzylbenzyl)[2- (2,2-dιmethyl-1-methylcarbamoyl propylcarbamoyl)-4- methylpentyl] phosphinic acid as a white solid ΗNMR (CD ₃ OD) d 0 83 (d,3H,J=6 9 Hz), 0 89 (d,3H,J=6 9 Hz), 1 02 (s,9H), 1 32 (m,1 H), 1 42 (m,1 H), 1 53 (m, 1 H), 1 67 (m,1 H), 1 99 (m,1 H), 2 69 (s,3H), 2 81 (m,1 H), 3 10 (d,2H,J=17 1 Hz), 3 94 (s,2H), 4 08 (s,1 H), 7 1-7 3 (m,9H), mass spectrum m/e 501 MAH ⁺ , HPLC retention time 12 96 minutes, and 208 mg of R,S (4-benzylbenzyl)[2-(2,2-dιmethyl-1 -methyl carbamoy!propylcarbamoyl)-4-methylpentyl]phosphιnιc acid as a white solid 'HNMR (CD ₃ OD) d 0 86 (d,3H,J=6 9 Hz), 0 91 (d,3H,J=6 9 Hz), 1 02 (s,9H), 1 22 (m,1 H), 1 4-1 7 (m,3H), 2.00 (m,1 H), 2 64 (s,3H), 2 85 (m,1 H), 3 10 (d,2H,J=17 1 Hz), 3 94 (s,2H), 4 13 (s,1 H), 7 1-7 3 (m,9H), mass spectrum m/e 501 MAH ⁺ , HPLC retention time 15 84 minutes

The compounds in Table 7 were separated by a method analogous to that described in Example 79

Table 7