NOVEL PROCESS FOR PREPARING N-ACETYL(L)-4-CYANOPHENYLALANINEAC-(L)-PHE(4-CN)-OH AND N-ACETYL-(L)-P-AMIDINOPHENYLALANINE-CYCLOHEXYLGLYCINE-.BETA.-(3-N-METHYLPYRIDINIUM)-ALANINE AC-(L)-PAPH-CHG-PALME(3)-NH2

摘要

The present invention is related to a novel process for preparing N-acetyl-( L)- 4-cyanophenylalanine by resolving the racemic compound N-acetyl-(D, L)-4- cyanophenylalanine ethyl ester, and a novel process to prepare a stereoisome r of Ac-(L)-pAph-Chg-PalMe(3)-NH2 by using the intermediate N-acetyl-(L)-4- cyanophenylalanine.