Synthetic Studies of Bacitracin. IV. Synthesis of Thiazoline Peptides by Iminoether Coupling Method
作者:Yoshihiro Hirotsu、Tetsuo Shiba、Takeo Kaneko
DOI:10.1246/bcsj.40.2945
日期:1967.12
method of the thiazoline peptide was investigated. A benzyloxycarbonylaminoalkylimino ethyl ether derived from glycine, L-alanine, L-valine, L-leucine or L-isoleucine was coupled with ethyl L-cysteinate hydrochloride to afford the corresponding thiazoline peptide, that is, a dehydrated form of cysteine peptide. While L-cystine was obtained from acid hydrolyzates of those thiazoline peptides, hydrolysis
为了全合成杆菌肽A,研究了噻唑啉肽的合成方法。源自甘氨酸、L-丙氨酸、L-缬氨酸、L-亮氨酸或L-异亮氨酸的苄氧羰基氨基烷基亚氨基乙醚与L-半胱氨酸乙酯盐酸盐偶联得到相应的噻唑啉肽,即半胱氨酸肽的脱水形式。虽然 L-胱氨酸是从这些噻唑啉肽的酸水解产物中获得的,但在用碱或氨水处理后水解得到 DL-胱氨酸。此外,碱处理也引起与噻唑啉环相邻的氨基酸残基的外消旋化。