Highly Enantioselective Synthesis of α,α-Dialkylmalonates by Phase-Transfer Catalytic Desymmetrization
作者:Suckchang Hong、Jihye Lee、Minsik Kim、Yohan Park、Cheonhyoung Park、Mi-hyun Kim、Sang-sup Jew、Hyeung-geun Park
DOI:10.1021/ja110349a
日期:2011.4.6
A novel enantioselective synthetic method for the construction of a quaternary carbon center from malonates via phase-transfer catalytic (PTC) alkylation has been developed. The asymmetric α-alkylation of diphenylmethyl tert-butyl α-alkylmalonates with alkylating agents under phase-transfer catalysis conditions (aq 50% KOH, toluene, 0 °C) in the presence of (S,S)-3,4,5-trifluorophenyl-NAS bromide (8)