Synthesis of Unfunctionalized Carbonated Fragments Containing Two Vicinal Chiral Centers: Stereocontrolled Benzylation of Vinylsulfones Mediated by a Remote Sulfinyl Group
作者:José Luis García Ruano、Christine Schöpping、Cuauhtémoc Alvarado、José Alemán
DOI:10.1002/chem.201001006
日期:——
One‐pot benzylation of (E)‐vinylsulfones with optically pure 2‐p‐tolylsulfinylbenzyl carbanions and desulfinylation with tBuLi, followed by desulfonylation of the resulting 1‐sulfonylpropanes, provided acyclic hydrocarbons containing two connected chiral centers in very smooth conditions and almost complete control of the stereoselectivity (see scheme).
(E)-乙烯基砜的一锅苄基化与光学纯的2-对甲苯基亚磺酰基苄基碳负离子和t BuLi的去磺酰化,然后将所得的1-磺酰基丙烷进行磺酰化,在非常光滑的条件下提供了包含两个相连的手性中心的无环烃,几乎完全控制立体选择性(请参阅方案)。