作者:Toshimasa Itoh、Naoki Yamazaki、Chihiro Kibayashi
DOI:10.1021/ol0200807
日期:2002.7.1
[reaction: see text] An enantioselective total synthesis of (-)-adaline has been achieved starting from a chiral 6,6-disubstituted piperidone derivative previously prepared by diastereoselective allylation of a chiral tricyclic N-acyl-N,O-acetal. The key steps include lithium ion-activated SN2-type alkynylation of the tricyclic N,O-acetal leading to exclusive formation of the (6S)-ethynylpiperidine
[反应:见正文](-)-adaline的对映选择性全合成是从先前通过手性三环N-酰基-N,O-乙缩醛的非对映选择性烯丙基化制备的手性6,6-二取代哌啶酮衍生物开始的。关键步骤包括三环N,O-缩醛的锂离子活化SN2型炔基化反应,导致(6S)-乙炔基哌啶的独家形成和(2R,6S)-顺式2,6的闭环烯烃复分解反应-二烯基哌啶用于构建桥连的氮杂双环壬烷。