PHENYLALANINE DERIVATIVES AND PROCESSES FOR THEIR PRODUCTION

摘要

1526557 Phenylaniline derivatives and their preparation CHOAY SA and YISSUM RESEARCH DEVELOPMENT CO 8 Sept 1975 [9 Sept 1974] 36888/75 Heading C2C The invention comprises the compound of Formula I and its acid addition salts which may be prepared by esterifying the corresponding free acid with methanol and a method for assaying tripsin using as substrate a compound of Formula I. The preparation of intermediates of Formula III wherein R 1 is H or -CO 2 t-butyl which form the subject matter of Specification 1,526,558 is also described.