Asymmetric Synthesis of Fluorinated Flavanone Derivatives by an Organocatalytic Tandem Intramolecular Oxa-Michael Addition/Electrophilic Fluorination Reaction by Using Bifunctional Cinchona Alkaloids
作者:Hai-Feng Wang、Hai-Feng Cui、Zhuo Chai、Peng Li、Chang-Wu Zheng、Ying-Quan Yang、Gang Zhao
DOI:10.1002/chem.200902303
日期:2009.12.14
A bifunctional quinidine derivative, containing a trifluoromethyl group, was found to catalyze a tandem intramolecular oxa‐Michael addition/electrophilic fluorination reaction of activated α,β‐unsaturated ketones (see scheme). A series of chiral fluorinated flavanone derivatives were obtained in excellent yields and with high enantioselectivities.
发现含有三氟甲基的双功能奎尼丁衍生物可催化串联的α,β-不饱和酮的分子内氧杂-迈克尔加成/亲电氟化反应(参见方案)。以优异的产率和高对映选择性获得了一系列手性氟化黄烷酮衍生物。