Totally Regio- and Stereoselective Behavior of Mono- and Diactivated Cyclic Alkenes in the Lu Reaction: Synthesis of Enantiopure Functionalized Cyclopentanes
作者:José L. García Ruano、Alberto Núñez, Jr.、M. Rosario Martín、Alberto Fraile
DOI:10.1021/jo801896a
日期:2008.12.5
5-Alkoxyfuran-2(5H)-ones and their optically pure 3-p-tolylsulfinyl derivatives, synthetic equivalents of the acyclic esters, react with dipoles generated from allenoates and PPh(3) (Lu reaction), in a completely regioselective, pi-facial selective and endo-selective manner, yielding bicyclic adducts, which are easily converted into optically pure highly substituted cyclopentane derivatives.
5-烷氧基呋喃-2(5H)-及其旋光纯的3-对甲苯亚磺酰基衍生物(无环酯的合成等价物)与脲基甲酸酯和PPh(3)产生的偶极反应(Lu反应),在完全区域选择性的π下-通过面部选择性和内-选择性的方式,产生双环加合物,其易于转化为光学纯的高度取代的环戊烷衍生物。