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Patents Represented by Attorney Michael B. Hurd

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2-hydroxy-3-(4-methoxyphenyl)-3-(2-aminophenylthio)propionic acid, 8'-phenylmenthyl ester, especially for diltiazem

Patent number: 5008433

Abstract: The titled ester, especially having the (2S,3S)-configuration, which is an intermediate for the production of diltiazem, is provided. Very high yields are obtainable.

Type: Grant

Filed: April 6, 1990

Date of Patent: April 16, 1991

Assignee: Marion Laboratories, Inc.

Inventor: James T. Palmer