30193-57-8Relevant articles and documents
Carbohydrates as Chiral Auxiliaries in Asymmetric Darzens Reactions: Enantioselective Synthesis of the Benzothiazepine Ring System of Diltiazem
Nangia, Ashwini,Rao, P. Bheema,Madhavi, N.N.L.
, p. 1716 - 1730 (2007/10/03)
Carbohydrate alcohols 11 and 14, prepared from D-glucose and D-galactose, are employed as their chloro acetes 18 and 19 in the asymmetric Darzens glycidic ester condensation with p-anisaldehyde.Alcohol 11 induces modest diastereoselectivity (65:35) and af
Novel optically active carboxylic acid derivative l-lysine salt and process for production thereof
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, (2008/06/13)
A novel salt of d-threo-2-hydroxy-3-(2-amino--phenylthio)-3-(4-methoxyphenyl)-propionic acid represented by the following formula (1) wherein C* represents the carbon atoms of the optically resolved molecules,with L-lysine. The above compound can be produced by reacting d1-threo-2-hydroxy-3-(2-aminophenylthio)-3-(4--methoxyphenyl)-propionic acid with L-lysine or a metal salt of said propionic acid with an acid salt of L-lysine to form corresponding salts, and separating the difficult-ly-soluble salt from the resulting two optically active salts by utilizing the difference in solubility in a solvent between the two optically active salts. This compound is useful as a synthesis intermediate for a known pharmaceutical compound, diltiazem hydrochloride.
Process for preparing 1,5-benzothiazephine derivatives
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, (2008/06/13)
A process for preparing 1,5-benzothiazepine derivatives of the formula: STR1 wherein Ar is a phenyl substituted with a lower alkoxy, R is a lower alkyl, R1 and R2 are each a lower alkyl, and Y is a lower alkylene, which have excellent coronary vasodilating and psychoneurotic activities and are useful particularly as a Ca++ -antagonistic coronary vasodilator.