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5811576 Intermediates for anti-microbial quinolone carboxylic acids  
Novel 4-oxoquinoline-3-carboxylic acid compounds of the formula: ##STR1## wherein R 1 is cyclopropyl which may have 1 to 3 substituents of alkyl and halogen; phenyl which may be substituted by 1...
5792892 Processes for preparing aromatic, bromine-containing compounds, novel bromine-containing compounds, and their use as intermediate products in the synthesis of active agents  
The present invention relates to processes for the preparation of bromine-containing aromatic compounds, to novel bromine-containing compounds and to their use as intermediates in the synthesis of...
5773651 Process for the preparation of fluorine-containing chemical compounds  
Process for the preparation of fluorine-containing compounds by reduction in a container provided with a stirrer, the stirrer being constructed entirely or partly of a carbon material.
5756849 Process for grafting a substituted difluoromethyl group onto a compound containing an electrophilic functional group  
The invention relates to a process and a nucleophilic reagent which is useful for grafting a substituted difluoromethyl group onto a compound containing at least one electrophilic function,...
5756834 Process for preparing fluorinated aromatics  
It is known to prepare fluorinated aromatic compounds of the formula I ##STR1## in which X, Y and Z can have the meaning specified in the description, by reacting aromatic compounds of the formula...
5756804 Homogeneous process for carrying out cross-coupling reactions  
A process for preparing polycyclic aromatic compounds, which comprises reacting a) an aromatic boron compound with b) an aromatic halogen compound or an aromatic perfluoroalkylsulfonate in...
5736480 Supported phase chiral sulfonated BINAP catalyst solubilized in alcohol and method of asymmetric hydrogenation  
Supported phase catalysts in which the support phase, is non-aqueous and highly polar, such as a primary alcohol, and most preferably ethylene glycol, are. disclosed. An organometallic compound,...
5723658 Process for the preparation of salts of substituted or unsubstituted phthalic acids  
The present invention relates to a process for the preparation of salts of substituted or unsubstituted phthalic acids, by reacting a compound of the formula ##STR1## in which R 1 , R 2 , R 3 and...
5677469 Process for resolving chiral acids with 1-aminoindan-2-ols  
A process for the full or partial resolution of a mixture of enantiomers of a genus of chiral carboxylic acids is disclosed. The process uses a pure enantiomer of 1-aminoindan-2-ol as the resolving...
5543550 Process for the preparation of 5-fluoroanthranilic alkyl esters and/or 5-fluoroanthranilic acid  
The present invention relates to a process for the preparation of 5-fluoroanthranilic alkyl esters and/or 5-fluoroanthranilic acid, which comprises dissolving a 3-fluorobenzoic alkyl ester in...
5523476 Processes for producing tetrafluorophthalic anhydride and fluorobenzoic acids  
A process for producing tetrafluorophthalic anhydride, which comprises chlorinating tetrachlorophthalic anhydride to obtain 3,3,4,5,6,7-hexachloro-1-[3H]-isobenzofuranone, then fluorinating it to...
5523472 Process for the preparation of 5-fluoroanthranilic acid  
The present invention relates to a process for the preparation of 5-fluoroanthranilic acid, which comprises reacting 5-fluoro-2-bromotoluene in the presence of a catalyst and of an acidic solvent,...
5481032 Process for the preparation of halogenated benzoic acids  
A process for the preparation of halogenated benzoic acids of formula (1): ##STR1## in which R 1 , R 2 , R 3 , R 4 and R 5 are hydrogen, fluorine, chlorine or bromine atoms or C 1 -C 6 -alkyl,...
5478963 2,3-difluoro-6-nitrobenzonitrile and 2-chloro-5,6-difluorobenzonitrile-(2,3-difluoro-6-chlorobenzonitrile), process for their preparation and their use for the preparation of 2,3,6-trifluorobenzoic acid  
The present invention describes the novel intermediates 2,3-difluoro-6-nitrobenzonitrile and 2-chloro-5,6-difluorobenzonitrile, a process for their preparation and their advantageous use for the...
5473095 Process for the preparation of chlorinated 4,5-difluorobenzoic acids, -benzoic acid derivatives and -benzaldehydes  
The present invention relates to a process for the preparation of compounds of the formula ##STR1## in which R 1 is --CN, --COOH, --COOR', R' being an organic radical having 1 to 6 carbon atoms,...
5470998 Process for the preparation of esters of stilbenedicarboxylic acid  
Disclosed is a process for the preparation of 4,4'-stilbenedicarboxylate esters by a 3-step process utilizing p-toluic acid, an alkyl p-formylbenzoate and a trialkyl phosphite. The steps comprise ...
5430181 Process for improving a controlled oxidation reaction  
Process for improving a controlled oxidation reaction between at least one reactant and oxygen, in which at least one reactant is reacted with oxygen or an oxygen containing gas, constituting a...
5424278 Hydroxycornexistin  
Hydroxycornexistin (1), the free dibasic acid thereof (2) ##STR1## agronomically acceptable bis-ester, monoester, monoamide, and monothioesters thereof, and agronomically acceptable salts thereof...
5411933 Bromopropargyl quarternary ammonium compounds having antimicrobial activity  
Antimicrobial compounds of the formula ##STR1## wherein R, R 1 and R 2 are selected according to the following: A. R is (C 11 -C 16 ) alkyl (straight or branched), and R 1 and R 2 are...
5380927 Process for preparing optically active 2-aryl-alkanoic acids, in particular 2-aryl-propionic acids  
A chemical process is disclosed for the preparation of a pharmaceutically active compound in stereospecific form selected from the group of compounds having the formula: ##STR1## and their...
5362909 Process for the preparation of 3-chloro-2,4,5-trifluorobenzoyl chloride, 2,4,5-trifuluorobenzoyl fluoride, and 2,3,4,5-tetrahalogenobenzene derivatives  
2,4,5-Trihalogenobenzene derivatives of the formula ##STR1## in which R is --COOH, --COCl, --COF, --CN, --CONH 2 , --CH 2 OH, --CH 2 Cl, --CHCl 2 , --CCl 3 or --CHO, R 1 is H, Cl or F, and ...
5359122 Preparation of 3-arylacrylic acids and their derivatives  
The preparation of 3-arylacrylic acids and their derivatives I ##STR1## where Ar is aryl which can additionally have substituents which do not react with ketene and are stable under the conditions...
5352701 Leukotriene-B.sub.4 antagonist compounds and their use as pharmaceutical agents  
1. Leukotriene-B 4 antagonists of formula I ##STR1## are described, in which X is a CH 2 group or an oxygen atom, Y is C 1 -C 4 -alkoxy or --S(O) p --C 1 -C 4 -alkyl, p is 0, 1 or 2 ...
5347057 Method for oxidation of methane and other hydro-carbons  
This invention teaches the oxidation of alkanes and cycloalkanes in the presence of air or oxygen and a ruthenium metal complex catalyst containing an end or bridged-oxo group with a liquid L and...
5336806 Purification of 2,4,5-trifluorobenzoic acid  
Disclosed is a process for isolating and purifying 2,4,5-trifluorobenzoic acid from a solution in a decarboxylating solvent such as NMP. The solution is neutralized with a hydroxide. This results...
5331011 N-benzyl-n-phenoxyethylamines and agricultural and horticultural bactericides  
Disclosed is an N-benzyl-N-phenoxyethylamine selected from the group consisting of the N-benzyl-N-phenoxyethylamine represented by the following formula (I): ##STR1## and an agriculturally...
5321154 Optical resolution of (±)-2-(4-isobutylphenyl)-propionic acid  
(±)-2-(4-Isobutylphenyl)-propionic acid can be resolved into optically active isomers easily and with high yields. The method is characterized by the use of the optically active amine of the...
5302752 Acetic acid derivatives and their production  
Compounds of formula ##STR1## where n is an integer from 1 to 12, R and R 1 are the same or different and are hydrogen or C 1 to C 6 linear or branched alkyl as well as their physiologically...
5292928 Process for the reaction of a low-molecular hydroxyl compound with a carboxylic acid halide  
In a process for reacting a low molecular weight hydroxy compound with a carboxylic acid halide, a small amount of the acid halide is introduced into the reaction vessel and the remainder of the...
5274186 Intermediates and their use in the synthesis of organic compounds  
Compounds of formula ##STR1## (wherein Ar, R, R 1 and X have the meaning reported in the description) are useful intermediates for the preparation of a variety of organic compounds, also optically...
5264408 Ceramic materials, method of preparing the same and hydrogenation and oxidation processes using the same  
The present invention relates to ceramic materials containing a homogeneous dispersion of metal particles, particularly sol-gel ceramic materials, a method of preparing the same, and processes for...
5248817 Process for aromatic bromination  
A novel procedure for bromination of aromatic moieties utilizes N-bromosuccinimide or dibromodimethylhydantoin in an aqueous alkali medium. The bromination procedure is employed for the preparation...
5237092 Process for concurrently producing aryl formate and aromatic carboxylic acid  
A process for efficiently producing aryl formate and aromatic carboxylic acid from aldehyde, which comprises oxidizing an aromatic aldehyde with an oxygen-containing gas in the presence of a...
5214193 Production of bisphenol monoester  
A bisphenol monoester represented by the formula (I): ##STR1## wherein R 1 is hydrogen or alkyl, R 2 and R 3 are each alkyl, and R 4 is alkyl, alkenyl or phenyl, is produced by continuous two...
5208366 High yield method for preparation of dialkyl esters of polyhaloaromatic acids  
An improved process is provided for the preparation of esters of polyhalophthalic acids, polyhalobenzoic acids, and polyhalophthalic anhydride useful as flame retardants for thermoplastic and...
5202472 Asymmetric hydrogenation of aromatic-substituted olefins using organonickel catalyst  
A process for the asymmetric reduction of carboxylic acids of the formula ##STR1## or the amine salts thereof, where R and R 1 are the same or different and are hydrogen, alkyl, cycloalkyl or...
5198576 Bicyclooctyl phosphines and catalysts thereof  
Bicyclooctyl phosphines are disclosed having the formula: ##STR1## where R is C 1 to C 6 linear or branched alkyl, phenyl, substituted phenyl, halo, or C 1 or C 6 alkoxy; Ar is phenyl,...
5196590 Method of making 2,4,5-trihalobenzoic acid  
Disclosed is a method of making 2,4,5-trihalobenzoic acid by heating to a temperature of about 130° to about 190° C. a composition that comprises water, a mineral acid, and a compound having the...
5191095 Asymmetric hydrogenation of olefinic amides using organoruthenium catalyst  
A process for the asymmetric reduction of olefinic amides of the formula ##STR1## where R and R 1 are the same or different and are hydrogen, alkyl, cycloalkyl or haloalkyl and Ar is aryl or...
5190905 Asymmetric hydrogenation of aromatic-substituted olefins using metal or metal alloy catalysts  
A process for the asymmetric reduction of carboxylic acids of the formula ##STR1## or the amine salts thereof, where R and R 1 are the same or different and are hydrogen, alkyl, cycloalkyl or...
5179230 Process for the preparation of 2,3,4,5-tetrafluorobenzoic acid  
A process for the preparation of 2,3,4,5,-tetrafluorobenzoic acid of the formula (1) ##STR1## by heating N'-substituted N-aminotetrafluorophthalimides of the formula (2) ##STR2## in which X is the...
5162577 Process for lithiation of 1,3-bis(trifluoromethyl)benzene  
A novel process for the lithiation of 1,3-bis(trifluoro-methyl)benzene in a solvent is described, said process comprising carrying out the lithiation with the lithium salt of an amine of the...
5113013 Process for preparing fluorine-containing organic compounds  
A method for the preparation of a fluorine-containing organic compound which comprises reacting a sulphonyl halide of the formula: RfSO 2 X where Rf represents a fluorinated organic radical and...
5093529 Process for the preparation of fluorinated benzoic acids  
In the process for the preparation of fluorinated benzoic acids of the formula I ##STR1## in which X and Y, for example, independently of one another denote chlorine or fluorine and X moreover...
5093515 Fluorinated benzoyl compounds  
A 2-chloro-4,5-difluorobenzoyl compound of the formula: ##STR1## wherein R 2 is a lower alkyl group, and R 7 is a 2,4-difluorophenyl group or a 4-fluorophenyl group.
5089661 New process for the preparation of 2-aryl-propionic acids  
A new process is described for the preparation of a 2-aryl-propionic acid, such as for instance 2-[4-(2-methyl-propyl)phenyl]propionic or 2-(6'-methoxy-2'-naphthyl)propionic acid, through...
5081252 Process for the preparation of aromatic carboxylic acids  
A process for the preparation of aromatic carboxylic acids or their salts comprises heating carboxyl-free aromatic compounds and aromatic carboxylic acid salts whose basic structures differ from...
5072038 2,3,4,5-tetrahalogenobenzene derivatives  
2,3,4,5-trihalogenobenzene derivatives of the formula ##STR1## in which R is --COOH, --COCl, --COF, --CN, --CONH 2 , --CH 2 OH, --CH 2 Cl, --CHCl 2 , --CCl 3 or --CHO, R 1 is H, Cl or F, and...
5004832 Preparing alpha-arylalkanoic acids  
Compounds are described of formula ##STR1## in which: Ar represents an aryl, possibly substituted; R represents a C 1 -C 4 alkyl; R' represents a hydroxyl, an alkoxy, an amino group...
4999441 Tetrakis(dialkylamino)aromatics and their charge transfer complexes  
Tetrakis(dialkylamino)aromatics Ia to Ic ##STR1## where the radicals A may be identical or different and are n-C 1 -C 6 -alkyl and the radicals R may be identical or different and are hydrogen or...
Matches 51 - 100 out of 430 < 1 2 3 4 5 6 7 8 9 >