Copper-Catalyzed Asymmetric Allylic Alkylation of Halocrotonates: Efficient Synthesis of Versatile Chiral Multifunctional Building Blocks
作者:Tim den Hartog、Beatriz Maciá、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1002/adsc.201000109
日期:——
The highly enantioselective synthesis of α‐methyl‐substituted esters is reported in up to 90% yield and up to 99% ee using copper‐TaniaPhos as chiral catalyst. The transformation proved scalable to at least 6.6 mmol (1.7 g scale). The products of this transformation have been further elaborated to multifunctionalbuildingblocks with a single (branched esters and acids) or multiple stereogenic centers