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。