Total Syntheses of Bistratamides J, E, and H from Two Types of ΔAla-Containing Oligopeptides
作者:Hiroyuki Suzuki、Masanori Andoh、Yasuchika Yonezawa、Shoji Akai、Chung-gi Shin、Ken-ichi Sato
DOI:10.1246/bcsj.81.495
日期:2008.4.15
subsequent Hantzsch thiazole synthesis between 4 and 5 afforded a linear N,O-protected bis(heterocyclic)peptide as the precursor of 1. Upon deprotection, the precursor was converted to 1 via macrocyclization under high-dilution condition, using BOP [benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate] as the condensing agent. Furthermore, 1 was converted to 2, which was transformed into