Helvetica Chimica Acta

Synthese von Carbobenzoxy??dipeptid??p??nitrophenylestern. Über aktivierte Ester IX

B Iselin, R Schwyzer

Index: Iselin,B.; Schwyzer,R. Helvetica Chimica Acta, 1960 , vol. 43, p. 1760 - 1766

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Citation Number: 56

Abstract

Abstract A study of the preparation of carbobenzoxy-dipeptide p-nitrophenyl esters revealed that partial racemization may occur depending on the structure of the dipeptide derivative used. Whereas carbobenzoxy-S-benzyl-L-cysteinyl-L-tyrosine yielded an optically pure ester employing the sulfite method, the synthesis of the ester of carbobenzoxy-L-tyrosine by various methods proceeded with partial racemization. The optically pure carbobenzoxy-L- ...