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
描述了天然存在的双和三(杂环)环肽双链酰胺 J (1)、H (2) 和 E (3) 从两种类型的脱氢肽的总合成。该策略涉及制备有前景的构件:N-(2-[(S)-1-(N-benzyloxycarbony1)amino-2-methylpropyl1]thiazol-4-y1carbonyl}-L-Val-(S)NH2 ( 4)作为左半部分,N-(3-溴-2-氧代丙酰基)-L-Val-O-(叔丁基二苯基甲硅烷基)-L-苏糖酸甲酯(5)作为右半部分。 4 和 5 之间的噻唑合成提供线性 N,O 保护的双(杂环)肽作为 1 的前体。脱保护后,前体在高稀释条件下通过大环化转化为 1,使用 BOP [苯并三唑-1-基氧基三(二甲氨基)六氟磷酸鏻]作为缩合剂。此外,1转化为2,