Li+ and Na+ switch of enantioselectivity in the desymmetrisation of polycyclic bis(phenylsulfonyl)alkenes by chiral alcohols
作者:Sergio Cossu、Ottorino De Lucchi、Paola Peluso、Raffaella Volpicelli
DOI:10.1016/s0040-4039(00)01261-2
日期:2000.9
A complete switch of enantioselectivity is obtained in the desymmetrisation reaction of polycyclic bis(phenylsulfonyl)alkenes by the change of the base from n-BuLi to NaH, thus allowing convenient access to either enantiomer of polycyclic ketones with the same chiral auxiliary.
在多环双(苯磺酰基)烯烃的不对称反应中,通过将碱从n -BuLi变为NaH的变化,可以实现对映选择性的完全转换,从而可以方便地获得具有相同手性助剂的多环酮的对映异构体。