Enantioselective [2,3] wittig ring contraction induced by chiral bases. The total synthesis and absolute configuration of (+)-aristolactone
作者:James A. Marshall、Jacques Lebreton
DOI:10.1016/s0040-4039(00)95502-3
日期:1987.1
[2,3] Wittig ring contraction of the achiral 13-membered acetylenic ether 1 via treatment with lithio (R,R) or (S,S)-bis-(1-phenylethyl)amide afforded the (R)-(+) or (S)-(-)-propargylic alcohol (+)-2 or (-)-2, respectively, of > 60% ee in 75% yield.
[2,3]通过用硫代(R,R)或(S,S)-双-(1-苯基乙基)酰胺处理,非手性13元乙炔醚1的Wittig环收缩得到(R)-(+)或(S)-(-)-炔丙醇(+)- 2或(-)- 2分别具有> 60%ee,产率为75%。