作者:Masahiko SEKI、Kazuya NAKAO
DOI:10.1271/bbb.63.1304
日期:1999.1
Oxazoline-4-acetate derivative 3 that could be readily obtained from L-aspartic acid was subjected to highly stereoselective hydroxylation, and subsequent Mitsunobu inversion of the hydroxyl group led to (2S,3R)-3-amino-3-benzyl-2-hydroxybutanoic acid derivative 8 in a good yield. Coupling of 8 with L-leucine benzyl ester and subsequent cleavage of the protective groups provided (-)-bestatin 1 in a
可以容易地从L-天冬氨酸获得的恶唑啉-4-乙酸酯衍生物3进行高度立体选择性羟基化,随后羟基的Mitsunobu转化导致(2S,3R)-3-氨基-3-苄基-2-羟基丁酸衍生物8的收率好。8与L-亮氨酸苄基酯的偶联以及随后的保护基的裂解以高收率提供了(-)-贝他汀1。