Asymmetric nickel-catalyzed cross-coupling reaction of allylic substrates with grignard reagents
作者:Giambattista Consiglio、Oreste Piccolo、Lucia Roncetti、Franco Morandini
DOI:10.1016/s0040-4020(01)87621-3
日期:1986.1
Two possible routes for the synthesis of optically active olefinic compounds through cross-coupling reaction between allylic electrophiles and Grignard reagents catalyzed by nickel complexes containing chiral diphosphine ligands were investigated: i) the reaction of chiral racemic (or prochiral) allylic compounds with achiral Grignard reagents and ii) the reaction of chiral Grignard reagents with allyl
通过包含手性二膦配体的镍配合物催化的烯丙基亲电试剂与格氏试剂之间的交叉偶联反应,可以合成光学活性烯烃化合物的两种可能途径:i)手性外消旋(或手性)烯丙基化合物与非手性格氏试剂的反应ii)手性格氏试剂与烯丙基亲电试剂的反应。使用C 2手性配体,即(S,S)-1,2 ,第一反应路线(化合物11)的光学收率高于90%,第二路线获得最高58%(化合物34)-二甲基-1,2-乙二基双(二苯基膦)。