Asymmetric Synthesis via Acetal Templates. 14.1 Preparation of Enantiomerically Pure (3S,4S)- and (3S,4R)-Statine Derivatives
作者:R.G. Andrew、R.E. Conrow、J.D. Elliott、W.S. Johnson、S. Ramezani
DOI:10.1016/s0040-4039(00)96906-5
日期:——
Several (3S,4S)- and (3S,4R)-statine derivatives have been prepared by attack of nucleophiles on crystalline, epimeric N-BOC-lactams 7a and 7b. The key step in the synthesis of the lactams was the TiCl4-catalyzed coupling reactions of acetals derived from (R)-1,3-butanediol with allyltrimethylsilane.
通过亲核试剂攻击结晶的差向异构N-BOC-内酰胺7a和7b,已经制备了几种(3S,4S)-和(3S,4R)-Statine衍生物。内酰胺合成的关键步骤是TiCl 4催化的由(R)-1,3-丁二醇衍生的缩醛与烯丙基三甲基硅烷的偶联反应。