Enantioselective Carbon−Carbon Bond Formation via S<sub>N</sub>2‘ Displacements of Acyclic Allylic Mesylates<sup>1</sup>
作者:Joseph P. Marino、Alma Viso、Jae-Don Lee、Roberto Fernández de la Pradilla、Paloma Fernández、M. Belén Rubio
DOI:10.1021/jo961292i
日期:1997.2.1
S(N)2' displacement of enantiomerically pure allylic mesyloxy vinyl sulfoxides takes place with high yields and stereoselectivities. In these adducts, the newly created chiral center is adjacent to a vinyl sulfoxide functionality which should allow for subsequent chirality transfer operations. Alternatively, enantiopure alkenyl sulfones and alkenes bearing an allylic stereocenter are readily available
对映体纯的烯丙基甲磺酰氧基乙烯基亚砜的铜介导的S(N)2'置换以高收率和立体选择性发生。在这些加合物中,新产生的手性中心与乙烯基亚砜官能团相邻,后者应允许随后的手性转移操作。另外,对映体纯的烯基砜和带有烯丙基立体中心的烯烃很容易从这些加合物中以高度几何控制的方式获得。已经研究了结构相关的甲氧基氧化硫和砜与有机铜酸盐的S(N)2'置换。从烯丙基醇位置的单一对映异构体,可以通过调节硫的氧化水平来控制新手性中心的绝对构型。