| Patents for C07D 315 - Heterocyclic compounds containing rings having one oxygen atom as the only ring hetero atom according to more than one of groups (1,360) |
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| 02/23/1993 | US5189182 Preparation of 5-methylbutyrolactone |
| 02/17/1993 | EP0527642A1 Process for simultaneously producing lactone and aromatic carboxylic acid |
| 02/15/1993 | CA2075776A1 Diastereomerically pure intermediates and their use in the preparation of (r)- or (s)-ketoprofen |
| 02/04/1993 | WO1993002069A1 Process for the recovery of purified gamma-butyrolactone in high yield from its crude reactor effluent |
| 02/04/1993 | WO1993002068A1 Process for the production of blo and thf in predetermined amounts |
| 02/03/1993 | EP0524954A1 Vapor phase process for production of gamma-butyrolactone |
| 01/20/1993 | EP0523774A1 Process for the preparation of gamma-butyrolactone |
| 01/19/1993 | US5180736 Polycyclic amines useful as cerebrovascular agents |
| 12/22/1992 | CA1311766C Acid accelerated hydrocarboxylation |
| 12/08/1992 | CA1311208C Process for reducing the ketene trimer content in a raw diketene |
| 11/17/1992 | US5164387 Condensed heterocyclic compounds |
| 11/02/1992 | CA2067723A1 Antheilmintic milbemycin analogs of novel microorganisms |
| 10/28/1992 | CN1018830B Process for decreasing ketene tripolymer in diketen products |
| 10/13/1992 | US5155237 Heating low molecular weight polylactones in presence of alkali metal, ammonium or phosphonium cations |
| 10/13/1992 | US5155129 Agents for treating disorders from cerebral neuro-degeneration |
| 10/13/1992 | US5154763 Stabilized aqueous alkyldiketene emulsions |
| 10/07/1992 | EP0507023A1 Process for producing gamma-butyrolactone |
| 09/29/1992 | CA1308111C Method for making bicyclic lactones |
| 09/22/1992 | US5149836 Catalytic hydrogenation of maleic anhydride with first catalyst to give lactone and next stage with second catalyst to produce tetrahydrofuran; process control |
| 09/16/1992 | EP0503312A1 Procedure for preparation of 15-pentadecanolide or mixtures rich in this macrolide |
| 08/04/1992 | US5136058 Dehydrating and cyclizing by-product 4-hydroxybutyric acid to additional butyrolactone |
| 07/29/1992 | EP0496562A1 Process for producing carboxylated compound |
| 07/28/1992 | CA1305715C Process for the production of substantially pure gamma-butyrolactone |
| 07/23/1992 | WO1992012143A1 Process for producing cis-whiskey-lactone |
| 07/14/1992 | US5130157 Process for concentrating lactones |
| 06/25/1992 | WO1992010487A1 PROCESS FOR CONVERTING α-ACYL-SUBSTITUTED LACTONES TO α-ALKYLIDENE-SUBSTITUTED LACTONES |
| 06/11/1992 | WO1992009590A1 PROCESS FOR THE PREPARATION OF α-ALKYL LACTONES |
| 06/02/1992 | US5118821 Catalytic hydrogenation of maleic anhydride |
| 05/14/1992 | DE4035485A1 Gamma-lactone prodn. from culture broth - by thermal lactonisation of hydroxy acid in broth |
| 05/06/1992 | EP0471020A4 Production of lactones from diols |
| 05/05/1992 | US5110954 Catalytic conversion to lactone |
| 04/21/1992 | US5106995 Reacting with oxidizing agent and ruthenium catalyst at low temperature |
| 04/01/1992 | EP0478147A1 Process for producing optically active gamma-butyrolactone derivatives |
| 03/09/1992 | WO1992014720A1 PROCESS FOR PRODUCING 4-SUBSTITUTED η-LACTONE, AND NOVEL SUBSTANCE |
| 02/19/1992 | EP0471020A1 Production of lactones from diols |
| 02/04/1992 | US5086030 Calcined silica gel supporting with transition metals, their oxides and mixtures; one step hydrogenation catalysts |
| 01/23/1992 | WO1992000973A1 Dehydrogenation of diols |
| 01/07/1992 | US5079372 Method for producing a lactone |
| 12/11/1991 | EP0460413A1 A method of preparing trans-3,4-disubstituted-gamma-lactones |
| 12/11/1991 | EP0460358A2 Agent for treating disorders from cerebral neuro-degeneration |
| 12/10/1991 | US5072009 Vapor-phase hydrogenation of maleic anhydride to tetrahydrofuran and gamma-butyrolactone |
| 12/10/1991 | US5072005 Reacting acrolein, carbon monoxide, methanol in presence of palladium catalyst, hydrogen halide and arylarsine promoter |
| 12/10/1991 | US5071853 Amine-substituted hexahydroindeno(2,1-b)pyrroles, -indeno(2,1-c)pyridines or -indeno(2,1-d)azepines; cerebral ischemia or infarction |
| 12/07/1991 | CA2037188A1 Agent for treating disorders from cerebral neuro-degeneration |
| 11/26/1991 | US5068361 Cyclization, deesterification, esterification over a fixed bed or fluidized bed oxidic catalyst |
| 10/30/1991 | EP0454397A1 Process for preparing epsilon-caprolactone |
| 10/26/1991 | CA2040270A1 Process for preparing ¹-caprolactone |
| 10/17/1991 | WO1991016318A1 Vapor phase process for production of gamma-butyrolactone |
| 10/17/1991 | WO1991016132A1 Process of vapor phase catalytic hydrogenation of maleic anhydride to gamma-butyrolactone in high conversion and high selectivity using an activated catalyst |
| 10/17/1991 | CA2080246A1 Vapor phase process for production of gamma-butyrolactone |
| 10/17/1991 | CA2080123A1 Process of vapor phase catalytic hydrogenation of maleic anhydride to gamma-butyrolactone in high conversion and high selectivity using an activated catalyst |
| 10/08/1991 | US5055599 Process for the hydrogenation of maleic anhydride to tetrahydrofuran and gamma-butyrolactone |
| 09/10/1991 | US5047561 Process for producing a lactone |
| 08/28/1991 | EP0443392A1 Process for the production of tetrahydrofuran and alphabutyrolactone |
| 08/20/1991 | US5041564 Rapidly vaporized reactant with hot hydrogen gas |
| 08/06/1991 | US5037825 Useful In The Treatment Of Neoplasms, Dermatoses And Aging Of The Skin |
| 07/24/1991 | EP0437764A1 Stable aqueous emulsions of alkyl-keten dimer |
| 07/19/1991 | CA2034355A1 Stabilized aqueous alkyldiketene emulsions |
| 07/16/1991 | US5032320 Oil additives |
| 07/09/1991 | US5030328 Method of separating γ-butyrolactone from mixtures containing diethyl succinate |
| 06/04/1991 | US5021589 Method for producing a lactone |
| 05/22/1991 | EP0428030A2 Process for the separation of gamma-butyrolactone from mixtures containing diethyl succinate |
| 04/03/1991 | EP0420062A2 Process for producing a lactone |
| 03/12/1991 | US4999438 Process for the reduction of the polymer portion in the dimerization of ketene |
| 03/12/1991 | CA1281302C Production of lactones |
| 02/26/1991 | US4996333 Conversion of acetic acid into diketene and water using dimethylsulfoxide and pelargonic acid |
| 02/19/1991 | US4994583 Process for the preparation of epsilon-caprolactone |
| 02/06/1991 | CN1049011A Ester production by hydrogenation of carboxylic acids and anhydrides |
| 01/29/1991 | US4988825 Oxidation of an aldehyde or ketone with an alkali metal perborate to form an acid or ester in the presence of an acid |
| 01/28/1991 | WO1991001964A1 Ester production by hydrogenation of carboxylic acids and anhydrides |
| 01/28/1991 | CA2036380A1 Ester production by hydrogenation of carboxylic acids and anhydrides |
| 01/02/1991 | CN1048172A Coated catalysts useful for hydrogenation of maleic anhydride to tetrahydrofuran and gamma-butyrolactone |
| 12/27/1990 | EP0404408A1 Use of coated catalysts for the hydrogenation of maleic anhydride to tetrahydrofuran and gammabutyrolactone |
| 12/25/1990 | US4980342 Process for the preparation of α-alkyl lactones |
| 12/23/1990 | CA2018370A1 Coated catalysts useful for the hydrogenation of maleic anhydride to tetrahydrofuran and gamma-butyrolactone |
| 12/05/1990 | EP0400904A1 Ester production by hydrogenation of carboxylic acids and anhydrides |
| 11/29/1990 | WO1990014344A1 Production of lactones from diols |
| 11/27/1990 | US4973713 Catalytic hydrogenation of carboxylic anhydrides to esters or lactones |
| 11/06/1990 | US4968818 Gamma-butyrolactone production process and catalyst therefor |
| 11/05/1990 | CA2014351A1 Production of lactones from diols |
| 10/23/1990 | US4965378 Vapor-phase hydrogenation of maleic anhydride to tetrahydrofuran and gamma-butyrolactone |
| 10/02/1990 | US4960906 Process for the preparation of lactones from higher alkenols |
| 09/26/1990 | EP0388977A2 Polycyclic amines useful as cerebrovascular agents |
| 09/23/1990 | CA2012866A1 Polycyclic amines useful as cerebrovascular agents |
| 09/19/1990 | EP0388141A1 Ferroelectric liquid crystal device |
| 09/19/1990 | EP0387499A2 Substituted oxine ethers and their use as pesticides |
| 08/30/1990 | DE4005516A1 Verfahren zur umwandlung (alpha)-acetyl-substituierter lactone in (alpha)-alkyliden-substituierte lactone Process for the conversion (alpha) -acetyl-substituted lactones in (alpha) alkylidene-substituted lactones |
| 08/30/1990 | DE4005515A1 Alpha-alkyl-substd. lactone(s) prepn. - by reaction of alpha-acyl-lactone, aldehyde and alkali metal hydroxide and hydrogenation of alkylidene lactone |
| 08/29/1990 | EP0384432A1 Liquid crystalline compound and use thereof |
| 08/21/1990 | US4950607 Process for the microbiological production of gamma (R) decanolide and gamma (R) octanolide |
| 08/14/1990 | US4948905 Synthesis of vinyl lactones |
| 07/31/1990 | US4945173 Distillation in presence of diethyl ethoxysuccinate |
| 07/18/1990 | CN1043931A Process for reducing amount of polymers during dimerization reaction of ketene |
| 07/11/1990 | EP0377438A1 Method for the reduction of the polymer content in the dimerisation of ketene |
| 07/10/1990 | CA1271488A1 Process for the preparation of 2-alkyl cyclopent-2- enones |
| 06/26/1990 | US4937359 Process for preparing (S)-4-methyl-β-butyrolactone |
| 06/05/1990 | US4931573 Method for producing a lactone |
| 03/06/1990 | US4906394 Lactone modified mono-or dicarboxylic acid based adduct dispersant compositions |
| 02/28/1990 | EP0356291A1 Process for the microbiological production of gamma-decalactone (R) and gamma-octalactone (R) |
| 02/14/1990 | EP0354529A2 Chiral hydroxycarboxylic acids from prochiral diols |