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Synthesis 2004(16): 2645-2652
DOI: 10.1055/s-2004-831255
DOI: 10.1055/s-2004-831255
PAPER
© Georg Thieme Verlag Stuttgart · New York
Highly Diastereoselective Peptide Chain Extensions of Unprotected Amino Acids with N-(Z-α-Aminoacyl)benzotriazoles
Further Information
Publication History
Received
13 May 2004
Publication Date:
06 October 2004 (online)


Abstract
Coupling an unprotected amino acid or dipeptide in partially aqueous solution with a readily available N-(Z-α-aminoacyl)benzotriazole or N-(Z-α-aminopetidoyl)benzotriazole affords N-terminal-protected di-, tri-, and tetrapeptides in yields of 85-98% (average 95% for 2a-i, 93% for 4a-f and 4a′, 86% for 5a-b) with minimal epimerization.
Key words
benzotriazole methodology - N-(Z-α-aminoacyl)benzotriazole - peptide coupling - peptides