Asymmetric synthesis via acetal templates. 9. Further studies of the allylation reaction. Preparation of (−)-dihydromyoporone
作者:William S. Johnson、Peter H. Crackett、John D. Elliott、Jacek J. Jagodzinski、Stephen D. Lindell、S. Natarajan
DOI:10.1016/0040-4039(84)80038-6
日期:——
A procedure has been developed for the high-yield coupling of chiral acetals 1 with allyltrimethylsilane (2, R′=H) as well as with methallyltrimethylsilane (2,R′=ME) to afford the hydroxy ethers 3 in which the new chiral center is formed highly enantioselectively. Homoallylic alcohols 4 of high ee are produced by removal of the chiral auxiliary.
已经开发了用于手性乙缩醛1与烯丙基三甲基硅烷(2,R'= H)以及与甲基烯丙基三甲基硅烷(2,R'= ME)的高收率偶联的程序,以提供其中新的手性中心为羟基醚3高度对映选择性地形成。通过除去手性助剂来生产高ee的均烯丙基醇4。