Highly Diastereoselective Peptide Chain Extensions of Unprotected Amino Acids with<i>N</i>-(Z-α-Aminoacyl)benzotriazoles
作者:Alan R. Katritzky、Kazuyuki Suzuki、Sandeep K. Singh
DOI:10.1055/s-2004-831255
日期:——
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.
在部分含水溶液中,将未保护的氨基酸或二肽与易得的N-(Z-α-氨基酰基)苯并三唑或N-(Z-α-氨基肽酰基)苯并三唑结合,可以以85-98%的产率(平均产率分别为2a-i的95%,4a-f和4a′的93%,5a-b的86%)获得N端保护的二肽、三肽和四肽,且消旋化程度最小。