Synthetic studies on (+)-wortmannin. An asymmetric construction of an allylic quaternary carbon center by a Heck reaction
作者:Shinobu Honzawa、Takashi Mizutani、Masakatsu Shibasaki
DOI:10.1016/s0040-4039(98)02298-9
日期:1999.1
Treatment of (±)-4 with Pd(OAc)2, DPPP, TBAB and K2CO3 in toluene gave 16β in a highly stereoselective manner (17:1, 90%). Moreover, reaction of (±)-4 with Pd(OAc)2, (R)-Tol-BINAP and K2CO3 in toluene afforded 16β in 96% ee and in 20% yield.
在甲苯中用Pd(OAc)2,DPPP,TBAB和K 2 CO 3处理(±)-4时,立体选择性高(16:1,90 %),得到16β。而且,(±)-4与Pd(OAc)2,(R)-Tol-BINAP和K 2 CO 3在甲苯中的反应以96%ee和20%产率得到16β。