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| Number | Title | Issue Date |
| 6784134 | Catalyst for preparation of unsaturated aldehyde and unsaturated carboxylic acid A catalyst suited for catalytic vapor-phase oxidation of isobutylene, t-butanol or propylene to produce respectively corresponding unsaturated aldehyde and unsaturated carboxylic acid is provided. Said catalyst consists of ring-formed shaped bodies composed of (i) a... | 08/31/2004 |
| 6191307 | Process for making benzoic acids A process of producing benzoic acids from phthalimides is described. The ability to dramatically reduce the reaction time in comparison to currently practiced processes by the addition of readily available compounds is demonstrated.... | 02/20/2001 |
| 5922906 | Side chains synthesis for an anthiarrhythmic compound The present invention is directed to an improved process for preparing the phenylacetic acid side chain of the compound of the formula ##STR1## This compound exhibits utility as a Class III antiarrhythmic agent.... | 07/13/1999 |
| 5872283 | Process for decarboxylation of halogenated aromatic carboxylic acids Halogenated aromatic carboxylic acids are decarboxylated by heating them in the presence of water at temperatures of 80° to 180° C. and in the presence of water and other acids at temperatures above 80° C.... | 02/16/1999 |
| 5792887 | Decarboxylation process A process for the monodecarboxylation of a halogenated aromatic dicarboxylic acid or derivative thereof in which the halogenated aromatic dicarboxylic acid or derivative thereof in a liquid medium is heated characterized in that the liquid medium is a pol... | 08/11/1998 |
| 5786494 | Process for the synthesis of -substituted acrylic acids and their application Process for the synthesis of a-substituted acrylic acids and their application. Process for the synthesis of a-substituted acrylic acids of general formula (I) and their application to the synthesis of N- (mercaptoacyl) aminoacid derivatives of formula (I... | 07/28/1998 |
| 5739388 | Process for the preparation of aromatic compounds by decarboxylation of aromatic carboxylic acids The present invention relates to a process for the preparation of compounds of the formula ##STR1## in which the radicals R1, R2, R3, R4 and R5 are identical or different and are COOH, H, F, Cl, ... | 04/14/1998 |
| 5668186 | Process for depolymerizing polyesters The invention relates to a novel process for depolymerizing polyesters by subjecting the polyesters to catalysts and organic solvents which are substantially free of oxygen and water in order to produce macrocyclic polyester oligomers substantially free o... | 09/16/1997 |
| 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 obtain 3,4,5,6-tetrafluorophthaloyldifluoride and/or 3... | 06/04/1996 |
| 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 in the formation of a salt of the 2,4,5-trifluorobenzoic ac... | 08/09/1994 |
| 5329054 | Decarboxylation process Activated carboxylic acids and esters such as pentafluorobenzoic acid are rapidly decarboxylated in high yields by reacting the acid or ester with an alkanolamine reagent which catalyzes the reaction.... | 07/12/1994 |
| 5275950 | Process for the preparation of a renin inhibiting compound Intermediates and a process for their preparation are disclosed which are useful for the preparation of a renin inhibiting compound of the formula: ##STR1## wherein R is a nitrogen-containing heterocycle which is bonded via a nitrogen atom to the sul... | 01/04/1994 |
| 5233085 | Preparation of 2,4,5-trifluorobenzoic acid by decarboxylation of 3,4,6-trifluorophthalic acid 3,4,6-Trifluorophthalic acid may be decarboxylated in a controlled manner to form 2,4,5-trifluorobenzoic acid by heating the phthalic acid in a dipolar aprotic solvent in the absence of any catalyst.... | 08/03/1993 |
| 5144067 | Process for the coproduction of alkyl iodides and alpha-iodocarboxylic acids and/or anhydrides thereof Disclosed is a process for the coproduction of (1) an alkyl iodide and (2) an -iodocarboxylic acid, a mono--iodocarboxylic anhydride or a mixture thereof which comprises contacting a mixture of an iodine compound and a carboxylic anhydride w... | 09/01/1992 |
| 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 hydrogenation of a complex salt which consists of the mono- and/or ... | 02/18/1992 |
| 5003103 | Preparation of 2-choloro-4,5-difluorobenzoic acid from 4,5-difluorophthalic anhydride of 4,5-difluorophthalic acid 2-Chloro-4,5-difluorobenzoic acid may be prepared by decarboxylating 4,5-difluorophthalic anhydride or 4,5-difluorophthalic acid by heating in N-methyl-2-pyrrolidone or dimethyl acetamide optionally using copper, copper oxide, copper salts, or halides or ... | 03/26/1991 |
| 4994606 | Process for the preparation of 4,5-difluoroanthranilic acid from 4,5-difluorophthalic anhydride or 4,5-difluorophthalic acid 4,5-Difluoroanthranilic acid may be prepared by decarboxylating 4,5-difluorophthalic anhydride or 4,5-difluorophthalic acid by heating in dimethyl acetamide, N-methyl-2-pyrrolidone or quinoline, optionally by reaction with copper, copper oxide, copper sal... | 02/19/1991 |
| 4937377 | Preparation of 3,4-difluorobenzoic acid by the decarboxylation of 4,5-difluorophthalic anhydride or 4,5-difluorophthalic acid 4,5-Difluorphthalic anhydride and 4,5-difluorophthalic acid may be decarboxylated in high yield to 3,4-difluorobenzoic acid by heating in N-methyl-2-pyrrolidone or dimethyl acetamide using copper, copper oxide, copper salts, or halides and salts of Zn, Cd... | 06/26/1990 |
| 4935541 | Preparation of 2,4,5-trifluorobenzoic acid by decarboxylation of 3,4,6-trifluorophthalic anhydride It has been discovered that 3,4,6-trifluorophthalic anhydride may be decarboxylated by heating in a polar aprotic solvent to yield 2,4,5-trifluorobenzoic acid.... | 06/19/1990 |
| 4782180 | Process for tetrafluorobenzoic acid An improved process for the preparation of 2,3,4,5-tetrafluorobenzoic acid is described which involves decarboxylation of tetrafluorophthalic acid in the presence of a base catalyst. Also described is an improved method for preparing tetrafluorophthalic a... | 11/01/1988 |
| 4769492 | Method for production of 2,3,4,5-tetrafluorobenzoic acid A method for the production of 2,3,4,5-tetrafluorobenzoic acid, which comprises effecting said production by decarbonating 3,4,5,6-tetrafluorophthalic acid in an aqueous medium adjusted to a pH in the range of 0.7 to 2.2 at a temperature in the range of 1... | 09/06/1988 |
| 4485244 | Thermal process for the liquefaction of aromatic hydrocarbon oxidation residues and recovery of acetic acid A thermal process for the decarboxylation and dehydration of aromatic acid residue to convert such residue to grindable form and recover the solvent of reaction therefrom.... | 11/27/1984 |
| 4345098 | Process for producing benzene carboxylic acid salts and their acids A process for producing an isomerized benzene carboxylic acid salt by treating a mixture of an aromatic material, water, and a water soluble reagent comprising a Group Ia or IIa metal with oxygen under conditions sufficient to convert at least a portion o... | 08/17/1982 |
| 4324904 | Processes for the preparation of hydratropic acids and esters The invention concerns the novel compounds dialkyl 2-(3-fluoro-4-nitrophenyl)-2-methylmalonate IIIa and dialkyl 2-(3-fluoro-4-aminophenyl)-2-methylmalonate IVa useful as intermediates in an improved process for making 2-(2-fluoro-4-biphenylyl)propionic ac... | 04/13/1982 |
| 4304930 | Process for the preparation of 2-(3-phenoxy-phenyl)-propionic acid 2-(3-Phenoxy-phenyl)-propionic acid or its pharmaceutical treatments, are prepared by hydrolyzing and partially decarboxylating ##STR1## wherein R=C1 -C6 alkyl or amino, the latter compounds being themselves new and, where R=C | 12/08/1981 |
| 4275229 | Polymers having improved water resistance and monomers for same Monoethylenically unsaturated beta-carbonyl-containing carboxyl functional monomers and addition polymers containing them and other monoethylenically unsaturated monomers are disclosed, as are methods of coating substrates with the polymers to provide fil... | 06/23/1981 |
| 4271316 | Process for the continuous rearrangement of alkali metal salts of aromatic carboxylic acids A process for the continuous rearrangement of alkali metal salts of aromatic carboxylic acids is disclosed. The process is conducted under an atmosphere of carbon dioxide and in the presence of an organic diluent and results in high conversion rates and p... | 06/02/1981 |
| 4258227 | Short residence hydropyrolysis of residues from aromatic carboxylic acid manufacture Short, less than one second, residence time non-catalytic hydropyrolysis is conducted by rapid heating at more than 600° C. per second of a solid mixture of aldehydo-, carboxy-, keto- and carboxy-, and aldehydo- and carboxy- substituted benzene and tolue... | 03/24/1981 |
| 4194053 | Process for preparing esters of -acetyl-'-methylsuccinic acid and esters of -methyl-'-acetyl-'-(5-methyl-3-oxohexyl)succinic acid A diester of -acetyl-'-methyl succinic acid is prepared in improved yield under substantially anhydrous process conditions which minimizes decomposition of that diester by reacting an acetoacetate ester with an -halopropionate ester i... | 03/18/1980 |
| 4052514 | Trihalosubstituted biphenylyl propionic acids Novel trihalosubstituted biphenylyl propionic and acetic acids and their derivatives are described together with processes for their preparation and composition of them. They are useful as anti-inflammatory agents.... | 10/04/1977 |
| 4009197 | 2-(6-Substituted-2'-naphthyl) acetic acid derivatives and the salts and esters thereof 2-(6'-Substituted-2'-naphthyl)acetic acid derivatives substituted at the 2-position of the acetic acid moiety with methyl, methylene or halomethylene and the salts and esters thereof have anti-inflammatory, analgesic and anti-pyretic activities.... | 02/22/1977 |
| 3957824 | 4-Hydroxycoumarins Novel 4-hydroxy coumarins substituted in the 3 position with substituted tetrahydronaphthyl groups are described. A method of making them by condensing 4-hydroxy coumarin with hydroxyl or halogeno derivatives of the substituted tetrahydronaphthalenes is d... | 05/18/1976 |
| 3953500 | Benzalicyclic carboxylic acid derivative Compounds of the formula: ##SPC1## Wherein R1 is an aryl group which may be substituted, R2 is hydrogen or a lower alkyl group having 1 to 4 carbon atoms and n is 1 or 2, or derivatives at the carboxyl function thereof, are useful as... | 04/27/1976 |
| 3932499 | 2-(Substituted biphenylyl) propionic acids 2-(Substituted biphenylyl)propionic acids and salts and esters thereof, said substituents being selected from fluorine and bromine atoms, useful as anti-inflammatory agents, and their preparation.... | 01/13/1976 |
