Patents
Sitemap › C07 - Organic chemistry › C07B - General methods of organic chemistry; Apparatus therefor › C07B 53 - Asymmetric syntheses
Patents for C07B 53 - Asymmetric syntheses (6,231)
01/1994
01/20/1994WO1994001392A1 (-)-ritodrine
01/20/1994WO1994001390A1 Enantioselective carbonyl group hydrogenation method using ruthenium/diphosphine ligand complexes
01/20/1994CA2139361A1 Process for enantioselective hydrogenation of the oxo c=o double bond
01/05/1994EP0576949A1 Optically active amino acid sulphoxide and sulphone derivatives, their preparation, their polymerisation and use as adsorbents for chromatograpic separation of racemates
01/05/1994EP0576617A1 Composition and method containing optically pure (s) metoprolol.
12/1993
12/29/1993CN1079960A 不对称氢化 Asymmetric hydrogenation
12/22/1993EP0574783A2 Asymmetric hydrogenation
12/14/1993CA1325225C Process for the production of optically-active beta-methylcholine
11/1993
11/30/1993US5266721 Process for preparing the pure enantiomers of lifibrol and its alkyl esters
11/25/1993WO1993023408A1 Enantioselective oxazaborolidine catalysts
11/25/1993WO1993023388A1 Method for making intermediates useful in synthesis of retroviral protease inhibitors
11/25/1993WO1993023383A1 Gaba and l-glutamic acid analogs for antiseizure treatment
11/25/1993WO1993023368A1 Urea-containing hydroxyethylamine compounds as retroviral protease inhibitors
11/24/1993EP0570764A2 Asymmetric hydrogenation
11/16/1993US5262566 Process for the preparation of optically active a-hydroxycarboxylic acids
11/09/1993US5260461 Ligands for ADH: cinchona alkaloids and moderately sized organic substituents linked through a planar aromatic spacer group
10/1993
10/20/1993EP0566030A2 Process for producing optically active olefin
10/20/1993EP0565975A2 Process for the preparation of isoprenoid derivatives
10/20/1993EP0521099A4 Chiral catalysts and epoxidation reactions catalyzed thereby
10/19/1993US5254704 Chemical intermediates
10/12/1993US5252759 Reacting with organic sulfonyl halide to produce organic sulfonate
10/12/1993US5252751 Diphosphines containing silane groups, immobilised diphosphines and the use thereof as hydrogenation catalysts
10/12/1993CA1323039C Process for the purification of d-hydroxyphenoxypropionic acid
10/06/1993EP0564406A1 Ferrocenyldiphosphine as ligands for homogeneous catalysts
10/06/1993EP0563636A1 Process for producing optical active 4-hydroxy-2-cyclopentenone
10/06/1993EP0563048A1 Aerosol formulations
10/05/1993US5250731 Asymmetric hydrogenation of N-acylhydrazones to N-acylhydrazines in presence of chiral phospholane complex
09/1993
09/30/1993WO1993019040A1 Preparation of optically active hydrazines and amines
09/30/1993CA2131792A1 Preparation of optically active hydrazines and amines
09/28/1993US5248815 Stereo-selective synthesis of 2-aryl-propionic acids of high optical purity by using chiral oxazolines
09/22/1993EP0561637A2 A catalyst for asymmetric induction
09/19/1993CA2087472A1 A catalyst for asymmetric induction
09/08/1993EP0558824A1 Method for the preparation of vicinal aminoalcohols and optically active O-protected derivatives thereof
09/08/1993EP0558656A1 New methods for the catalytic reduction of organic substrates.
09/02/1993WO1993017026A1 Process for preparing enantiomerically pure fluorinated epoxychromans
09/02/1993CA2130481A1 Process for preparing enantiomerically pure fluorinated epoxychromans
08/1993
08/31/1993US5241064 Enzymatic process for preparing optically active 3-substituted azetidinones
08/11/1993EP0554933A1 Method of preparing vicinal aminoalcohols
08/05/1993WO1993015091A1 Diphosphine ligands
08/05/1993WO1993015090A1 Diphosphine ligands
08/05/1993WO1993015089A1 Diphosphine ligands
08/05/1993CA2088552A1 Method of preparing vicinal aminoalcohols
08/04/1993EP0553778A1 Asymmetric hydrogenation
07/1993
07/28/1993EP0552679A1 Process for the enantioselective epoxidation of 6-substituted chromenes
07/20/1993CA1320495C2 Optically active ketals, processes for their preparation and their use in the synthesis of alpha-arylakanoic acids
07/19/1993CA2087415A1 Process for the enantioselective epoxidation of 6-substituted chromenes
07/08/1993WO1993013046A1 Stereo-selective synthesis of 2-aryl-propionic acids of high optical purity by using chiral oxazolines
06/1993
06/30/1993EP0548671A2 Process for preparing optically active alpha-hydroxy-carboxylic acids
06/30/1993CN1021436C Process for preparing of absolute stereochemical formula crystallographic compound
06/29/1993US5223632 Catalysts for asymmetric hydrogenation or isomerization
06/24/1993WO1993012062A1 Process for preparing ketone enantiomer
06/21/1993CA2085634A1 Process for the preparation of optically active .alpha.-hydroxycarboxylic acids
05/1993
05/11/1993US5210210 Chiral auxiliaries and their use in the synthesis of chiral molecules
05/11/1993US5210202 Chiral phosphorous compounds, a process for their manufacture and their application to the catalysis of enantioselective synthesis reactions
05/11/1993US5210196 Chiral sultams
05/05/1993CN1020451C Enantio-selective process for preparing derivatives of hemicaronic aldehyde of trns or cis-structure & intermediates obtained
04/1993
04/28/1993CN1071431A Asymmetric syntheses
04/27/1993US5206399 2,2'-bis(diphenylphosphino)-5,5',6,6',7,7',8,8'-octahydro-1,1'-binaphthyl and transition metal complex containing the same as ligand
04/15/1993WO1993007142A1 New ligands for asymmetric dihydroxylation: multiple cinchona alkaloid units attached to a central heterocyclic core
04/06/1993US5200561 Reacting oxime isomer with assymetric reducing agent obtained from optically active amine, metal borohydride, sulfuric acid
03/1993
03/30/1993US5198588 Intermediates for prostaglandins
03/30/1993US5198569 Hydrogenation of alpha-ketocarboxylic acid ester in the presence of a rhodium-phosphine catalyst
03/30/1993US5198562 Assymetric reactions
03/30/1993CA1315295C Asymmetric hydrogenolysis of epoxides
03/24/1993EP0532515A1 Preparation of substituted piperidines.
03/18/1993WO1993005146A1 Molecules with antibody combining sites that induce asymmetry
03/18/1993WO1993005015A1 Optically active alkylthiobenzoic acid derivative, and production and use thereof
03/18/1993CA2118707A1 Molecules with antibody combining sites that induce asymmetry
03/15/1993EP0594608A4 Chiral catalysts for enantioselective synthesis.
03/04/1993WO1993003839A1 Asymmetric syntheses
03/02/1993US5191085 Intermediates for carnitine for cardiovascular disorders
02/1993
02/23/1993US5189219 Reacting hydroxyl-protected cyanohydrin with grignard reagent, then with primary amine, reducing, deprotecting
02/23/1993CA1313876C Optically active iridium complexes and their use
02/17/1993CN1069028A Asymmetric synthesis of taxol side chain
02/04/1993WO1993002060A1 Process for the preparation of intermediates in the synthesis of chiral thiazolidine-2,4-dione derivatives
02/03/1993EP0525589A1 Asymmetric synthesis of taxol side chain
02/01/1993CA2071160A1 Asymmetric synthesis of taxol side chain
01/1993
01/21/1993WO1993001199A1 Chiral phospholanes via chiral 1,4-diol cyclic sulfates
01/19/1993US5180844 Chemical intermediates for prostaglandins
01/07/1993EP0521099A1 Chiral catalysts and epoxidation reactions catalyzed thereby
01/06/1993CN1067654A Processes for diastereoselective synthesis of nucleosides
12/1992
12/29/1992US5175335 Reacting vinyl aryl compounds with a source of hydrocyanic acid in presence of nickle zero valent compound and nonracemic bidentate organophosphorus ligand
12/29/1992US5175311 Method of enantioselective cyclopropanation using chiral catalysts
12/23/1992CN1067245A Processes for diastereoselective synthesis of nucleosides
12/16/1992EP0518110A2 Process for the preparation of pure enatiomers of 4-[4-(4'-tert.butylphenyl)-2-hydroxybutoxy]-benzoic acid and its alkyl ester
12/16/1992CN1019486B Process for preparation of gamma-butyrolactams
12/15/1992US5171892 Chiral phospholanes via chiral 1,4-diol cyclic sulfates
12/08/1992US5169943 Chiral reaction medium for organic reactions
11/1992
11/26/1992WO1992020696A1 Processes for the diastereoselective synthesis of nucleosides
11/26/1992WO1992020669A1 Processes for the diastereoselective synthesis of nucleosides
11/25/1992EP0515157A1 Processes for the diastereoselective synthesis of nucleosides
11/25/1992EP0515156A1 Processes for the diastereo-selective synthesis of nucleosides
11/25/1992EP0515142A1 Optically active epoxides and a process for the production thereof
11/17/1992CA1310323C Process and preparing cis-1-carba(1-dethia)cephalosporins and intermediates therefor
11/11/1992EP0512020A1 Process for preparing homochiral amines and process for preparing intermediates for the preparation thereof
10/1992
10/29/1992WO1992009545A3 New methods for the catalytic reduction of organic substrates
10/27/1992US5159093 Iridium-optically active phosphine complex and process for producing optically active alcohols using the same
10/27/1992US5159090 Enantioselective synthesis of antifolates
10/21/1992EP0509359A1 Process for the preparation of pure enantiomers of substituted (quinolin-2-yl-methoxy)phenylacetic acids
10/20/1992US5157143 Diastereoselective process for the preparation of intermediates useful for the synthesis of peptide derivatives
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