NCAs diamino acids

NCAs of L-aspartic acid 4-benzyl ester, L-cysteine [869, 870], L-cystine [871, 872], L-tyrosine [873], 4-nitrophenylalanine [874], 1-benzyl-histidine [875], 2,6-diamino-heptanedioic monobenzyl ester [876], L-ornithine, and L-alanine [865] have been prepared from the protected amino acids and PCI5. 

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