Highly stereoselective addition of organolithium reagents to chiral oxazolines. Asymmetric synthesis of 3-substituted alkanoic acids and 3-substituted lactones
Catalytic asymmetric conjugate addition of grignard reagents mediated by copper(I)-chiral bidentate phosphine complex
作者:Motomu Kanai、Kiyoshi Tomioka
DOI:10.1016/0040-4039(95)00759-6
日期:1995.6
A catalytic amount of a chiral phosphine 1-copper iodide complex catalyzes the conjugateaddition of organomagnesium chlorides to cycloalkenones and pentenolide to give the corresponding addition products in 94-72% ee.
Catalytic enantioselective conjugate addition of Grignard reagents to cyclic α,β-unsaturated carbonyl compounds
作者:Motomu Kanai、Yuichi Nakagawa、Kiyoshi Tomioka
DOI:10.1016/s0040-4020(99)00095-2
日期:1999.3
A catalytic asymmetric conjugateadditionreaction of organocopper reagents, generated from copper salt, a chiral phosphine, and Grignard reagent, with cyclohexenone is highly dependent on the counter anion of copper species, solvents, Grignard reagents, and the structure of the chiral phosphine. The reaction using the combination of 8 mol% of copper iodide, 32 mol% of the amidophosphine 3, and 1.2