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WO/2002/092547A1 |
The invention relates to a method for producing ketones by reacting boric acid derivatives with carboxylic acid anhydrides in the presence of a transition metal catalyst. The carboxylic acid anhydrides can either be used in isolated form...
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WO/2002/057199A1 |
The invention relates to a process for carrying out a homogeneously catalyzed C-C coupling reaction between an optionally substituted (hetero)aromatic bromide compound and a second reactant, which is chosen from the group of olefins in w...
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WO/2002/055486A2 |
The invention relates to novel triazene compounds, the use thereof and novel alkylation methods. Said triazene compounds have the general formula, X-Y-Z-N=N-NH-R, where X = an insoluble support material, Y = an atom, or group of atoms, f...
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WO/2002/041984A2 |
Methods and compositions are provided for the direct catalytic asymmetric aldol reaction of aldehydes with donor molecules selected from ketones and nitroalkyl compounds. The reactions employ as catalyst a Group 2A or Group 2B metal comp...
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WO/2002/036538A1 |
A process for producing an esterificated condensate, wherein a monomeric ester or thioester, or a polyester or polythioester is produced by carrying out a direct condensation reaction from a carboxylic acid and an equimolar amount of an ...
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WO/2002/030865A2 |
A process for the nitration of an aromatic compound, wherein the aromatic compound is admixed with a nitrating agent in the presence of an ionic liquid is described. The method for the nitration of aromatic compounds in (e.g. neutral) io...
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WO/2002/014254A1 |
A process in which an olefin is oxidatively decomposed to produce the corresponding carbonyl compound. It is a simple efficient process in which a harmful substance such as ozone is not used and the reaction can be conducted in an aqueou...
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WO/2002/008189A1 |
The present invention relates generally to amino acid derivatives and to methods of making the same. In particular, the invention relates to compounds bearing a stereochemical identity, that is, the same stereochemistry, with the chiral ...
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WO/2002/000575A1 |
A process for the nitration of conjugated alkenes of formula (I) wherein R, R¿1?, R¿2?, R¿3? and R¿4? have the meanings reported in the description, which allows to obtain the corresponding $g(b)-nitro-alkenes, characterised in that ...
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WO/2002/000590A1 |
The invention is directed to the cross-metathesis and ring-closing metathesis reactions between geminal disubstituted olefins and terminal olefins, wherein the reaction employs a Ruthenium or Osmium metal carbene complex. Specifically, t...
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WO/2001/081274A1 |
A phosphazenium compound represented by the formula (1) (1) (wherein Q?-¿ is an anion formed by removing a proton from an inorganic acid or from an active-hydrogen compound having an active hydrogen atom on an oxygen, nitrogen, or sulfu...
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WO/2001/081293A1 |
A process for producing a bis(4-hydroxy-3-nitrophenyl) compound, characterized in that a bis(4-hydroxyphenyl) compound comprising two phenyl groups bonded to each other directly or through an electron-donating bridging group, sulfoxide g...
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WO/2001/081286A1 |
A process for the preparation of (R)-1-(2,3-difluoro-6-nitrophenoxy)-propan-2-ol, which is a useful intermediate in the synthesis of the widely used antibiotic Levofloxacin is provided. A process for the preparation of (R)-1-(2,3-difluor...
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WO/2001/079151A1 |
The invention relates to the production of nitro benzoic acids by oxidation of special nitro toluenes, nitro benzyl alcohols, esters and/or ethers in the presence of nitric acid at a high temperature and high pressure. The special nitro ...
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WO/2001/079143A1 |
Novel techniques are disclosed for the direct fluorination of organic compounds by treatment with fluorine gas in a reaction mixture comprising hydrofluoric acid and at least one of water and formic acid. The techniques are particularly ...
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WO/2001/077061A1 |
The invention relates to a method for producing 4-hydroxy-3-nitrobiphenyl on the basis of 4-hydroxybiphenyl by highly selective and effective nitration in the vicinal position to the phenolic hydroxy group, whereby the azotic acid used a...
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WO/2001/074754A1 |
The invention concerns a method for preparing alkyl nitrites of formula (I) R ONO wherein R represents a C¿1?-C¿20?, advantageously C¿2?-C¿10? linear or branched alkyl group. The invention is characterised in that it consists in grad...
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WO/2001/068637A2 |
Among its several embodiments, the present invention provides an improved process for the preparation of tetrahydrobenzothiepine-1,1-dioxide compounds; the provision of a process for preparing a diastereomeric mixture of tetrahydrobenzot...
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WO/2001/064606A1 |
In a reaction system having at least two liquid-liquid interfaces between an aqueous phase, which comprises an organic phase of a material containing the compound to be separated and an aqueous solution of a clathrate complexing agent, a...
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WO/2001/064333A2 |
A tubular reactor (1) characterized by having short static mixing elements (1, 2, 3, 4, 5, 6, 7, 8, 9, 10) separated by coalescing zones (20, 21, 22, 23, 24, 25, 26, 27) is used to conduct multiphase liquid/liquid reactions. Small drople...
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WO/2001/058835A1 |
The present invention relates to a process for the resolution of DL-racemic mixtures of compounds which crystalize in the form of a conglumerate. Both, the D and L-enantiomers are obtained according to the invention in a industrially fea...
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WO/2001/046130A1 |
A process for producing fomesafen from acifluorfen comprises the steps of (a) converting acifluorfen to its acid chloride, (b) coupling the acid chloride so formed with methanesulphonamide to form crude fomesafen and (c) purifying the cr...
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WO/2001/042198A2 |
Novel process steps and novel processes for producing unsubstituted and substituted meta- and para- cyano benzoic acid compounds, as well as salts and derivatives thereof, and intermediates therefor which are useful as intermediates for ...
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WO/2001/028974A2 |
The invention concerns novel nitroaromatic compounds of general formula (I') wherein: R, R'¿1?, R¿2?, Z and n are as defined in Claim 38. The invention also concerns a method for preparing nitroaromatic compounds nitrated in position 4...
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WO/2001/026807A1 |
A supported catalyst comprises a cationic rhodium (I) complex of formula (1) wherein R?1¿ and R?2¿ are the same or different hydrocarbon groups of up to 30 C atoms, or R?1¿ and R?2¿ are linked to form a ring, and a heterogeneous supp...
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WO/2001/010815A1 |
Bis(4-hydroxy-3-nitro-5-perfluoroalkylphenyl)fluoro-alkanes represented by general formula (1): wherein Rf?1¿, Rf?2¿ and Rf?3¿ are each independently straight, branched or cyclic C¿1?-C¿10? perfluoroalkyl, or alternatively Rf?2¿ an...
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WO/2001/010814A1 |
A process for obtaining nitroxyalkylesters of the 2-(S)-(6-methoxy-2-naphthyl)-propanoic acid having an enantiomeric excess higher than or equal to 95 %, preferably higher than or equal to 98 %, characterized in that an halide of the 2-(...
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WO/2001/009065A2 |
The invention relates to a novel method for the nitration of organic compounds, preferably of aromatics and heteroaromatics, using known and novel types of nitration reagents.
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WO/2001/004082A1 |
A process for obtaining (nitroxymethyl)phenyl esters of salicylic acid derivatives of formula (I) wherein R¿1? is the OCOR¿3? group characterized in that it comprises the following steps: a) reaction of a halide of a salicylic acid der...
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WO/2001/002320A1 |
The invention concerns the use of aliphatic nitriles with relatively high molecular weight, as polar aprotic solvents, in particular in nucleophilic substitution reactions of the aromatic type. Said nitriles have a molecular mass more 79...
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WO/2001/002321A1 |
The invention concerns a method for the nucleophilic substitution of a hydroxyl function of an alcohol by a nucleophilic group (Nu) other than a fluorine atom, comprising steps which consist in: a) bringing together the alcohol with the ...
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WO/2001/002336A1 |
A method for preparing either the 1,2-dinitrate or the 1,3-dinitrate of glycerol involves protecting glycidol respectively with either trialkylsilyl ether group or an acetate group then nitrating with dinitrogen pentoxide under anhydrous...
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WO/2000/075094A2 |
The present invention provides a method for producing a specific acetophenone which is useful as an intermediate for pharmaceuticals or agricultural chemicals, i.e. a method for producing a halogenated acetophenone, which comprises react...
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WO/2000/069803A1 |
A process for the preparation of nitro compounds by reacting an organic substrate with nitrogen dioxide either in the presence of oxygen or under such conditions that the nitrogen dioxide/organic substrate ratio is less than 1 by mole. T...
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WO/2000/069800A2 |
The invention relates to a process for preparing compounds of formula (I), wherein R?1¿ and R?2¿ are as defined in the description.
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WO/2000/061531A1 |
The invention relates to a method of producing mono-, bi- and/or polyfunctional biaryls of the general formula (I) Ar-Ar' by reacting halogenated aromatics of the general formula (II) Ar-X with boron compounds of the general formula (III...
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WO/2000/059883A2 |
The invention relates to a method for producing N-aryl-aza-heterocycles of general formula (I) in which: R1, R2, R3, R4 and R5 are the same or different and represent a hydrogen atom, a nitro group, a cyano group, an alkoxycarbonyl group...
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WO/2000/058240A1 |
The invention relates to a method for carrying out an SNAr-type nucleophilic substitution on an aromatic substrate, characterized in that an aromatic substrate of general formula (I), wherein A represents an aromatic residue motif, X rep...
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WO/2000/058261A1 |
A solid nitrating reagent comprises either a montmorillonite clay or a zeolite material incorporating an amount of gaseous dinitrogen pentoxide. The clay material can be type K10 and suitable zeolites include those designated ZSM-5, zeol...
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WO/2000/051966A1 |
Disclosed herein is a process for preparing 4-nitrodiphenylamine using a nucleophilic aromatic substitution for hydrogen, comprising reacting carbanilide and nitrobenzene in a polar organic solvent in the presence of a base and a drying ...
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WO/2000/044705A1 |
The invention describes a method for the synthesis of nitroxymethylphenyl esters of aspirin derivatives.
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WO/2000/034215A1 |
Disclosed is a method of making an $g(a)-chloro-$g(a),$g(a)-difluoro aromatic compound. An $g(a),$g(a),$g(a)-trichloro aromatic compound having general formula (a), (b), (c), (d) or (e) where Y is C or N, R is halogen, R', amino, NHR', N...
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WO/2000/034223A1 |
A method of preparing dinitromethane salts usable as intermediate products and starting material for production of explosives and propellants. Substituted 1,2-diazoles, 1,2,4-triazoles or 1,3-diazines, such as barbituric acid, are nitrat...
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WO/2000/023435A1 |
Metal complexes which serve as catalysts in various chemical reactions or as materials in the information-electronics industry, exhibit peroxidase-like activities or high hydrolytic activities for phosphoric diesters, and can easily hybr...
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WO/2000/021922A2 |
(57) Abstract The invention relates to a process for the preparation of a compound of formula (I): wherein, R?1¿ represents C¿1-4 ?alkoxy; fluorine, chlorine or bromine; and R?2¿ represents hydrogen or C¿1-4 ?alkoxy; which process co...
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WO/2000/017132A1 |
Olefins containing aromatic substituents are synthesized without the addition of phosphonium salts or phosphanes with the aid of a Pd-II compound as a catalyst in the presence of nitrogen-containing additives such as N,N-dimethylglycine ...
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WO/2000/015599A1 |
The present invention relates to producing stereoselective nitro compounds by reacting a dicarbonyl compound with a nitrostyrene compound in the presence of a catalyst complex and a base.
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WO/2000/003971A1 |
A process for selectively eliminating a compound of general formula (II) from a mixture of a compound of general formula (I) with the compound of general formula (II). This process comprises reacting the compound of general formula (II) ...
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WO/2000/001647A2 |
Organic compounds, e.g., fluoro-organic compounds such as fluorocarboxylic acids or carboxylic acid chlorides can contain small quantities of carboxylic acid fluorides, HF or hydrolysable fluoride. Corrosive fluorides or hydrofluoric aci...
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WO/1999/058509A1 |
The invention relates to a method for producing isoxazolene of the formula (I), where the substituents have the following meanings: R?1¿ is hydrogen, C¿1?-C¿6? alkyl, R?2¿ is C¿1?-C¿6? alkyl, R?3¿, R?4¿, R?5¿ are hydrogen, C¿1?...
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