Studies of Unusual Amino Acids and Their Peptides. V. The Synthesis and the Absolute Configuration of β(2-Thiazolyl)-β-alanine Present in Bottromycin
作者:Yasuhiko Seto、Kazuhira Torii、K\={o}ichi Bori、Kenichiro Inabata、Shigeru Kuwata、Hiroshi Watanabe
DOI:10.1246/bcsj.47.151
日期:1974.1
bromoacetal, but the amino acid thus obtained showed no perceptible optical activity. The racemic amino acid, however, could be resolved into its antipodes by treating its phthalyl derivative with brucine. Thus, the (+)-amino acid, a constituent of bottromycin, was isolated in a pure state; it was determined to belong to the L-series by examining its optical behavior. This amino acid was proved to racemize
为了获得具有旋光活性的β-(2-噻唑基)-β-丙氨酸,将N-酰基-L-天冬氨酸α-硫代酰胺-β-甲酯与溴乙缩醛缩合,但由此获得的氨基酸未见明显光学活性。然而,外消旋氨基酸可以通过用马铃薯碱处理其邻苯二甲酰衍生物而分解为其对映体。因此,(+)-氨基酸,肉毒杆菌素的一种成分,以纯净的状态被分离出来;通过检查其光学行为,确定它属于 L 系列。证明该氨基酸在肉毒杆菌素酸水解条件下容易外消旋化。