diastereoselectivity (up to 98% de). syn-Isomers are accessed from the initial adducts via Mitsunobu inversion/saponification. The corresponding thionocarbamates undergo mild Cu(I)-mediated cross-coupling with a variety of organic halides, inter alia, allylic, cinnamylic, propargylic, and acetylenic, with retention of configuration. [reaction: see text]
在前手性醛中添加Zn(n-Bu(3)Sn)(2)可得到抗α,β-二烷氧基-和抗α-烷氧基-β-
氨基stannanes,收率好(高达77%)和出色的非对映选择性(高达98%de)。通过Mitsunobu转化/皂化作用从最初的加合物中获得顺式异构体。相应的
硫代
氨基甲酸酯与各种有机卤化物(尤其是烯丙基,
肉桂酸,炔丙基和炔属)进行温和的Cu(I)介导的交叉偶联,并保留构型。[反应:看文字]