A New Methodology for Synthesis of a Chiral Phosphinocarboxylic Acid through Michael Cyclization−Aldol Tandem Reaction of Chiral α,β,χ,ψ-Unsaturated Bisphosphine Oxide and Application in Palladium-Catalyzed Asymmetric Allylic Alkylation
作者:Hideki Inoue、Yasuo Nagaoka、Kiyoshi Tomioka
DOI:10.1021/jo025725v
日期:2002.8.1
treatment with lithium diisopropylamide and then benzaldehyde, a chiral alpha,beta,psi,omega-unsaturated bisphosphine oxide underwent Michael cyclization-aldol tandem reaction to afford the corresponding endo-alpha,beta-unsaturated cyclic bisphosphine oxides. Sequential stereoselective reduction and Horner-Wadsworth-Emmons olefination gave the corresponding monophosphine oxide. Oxidative conversion of an olefin
在先后用二异丙基氨基锂和苯甲醛处理后,使手性α,β,psi,ω-不饱和双膦氧化物进行迈克尔环化-羟醛串联反应,得到相应的内α,β-不饱和环状双膦氧化物。顺序立体选择性还原和霍纳-沃兹沃思-埃蒙斯烯化反应得到相应的一氧化膦。烯烃部分的氧化转化为羧基,然后氧化物脱氧,得到相应的手性膦基羧酸,该羧酸已成功地用作钯催化的不对称烯丙基烷基化中的手性和官能化单膦配体。