Ring-Opening Reactions of Cyclopropenedicarboxylates with Organolithiums and Organozincs
作者:Yu Liu、Qiong Yu、Shengming Ma
DOI:10.1002/ejoc.201201588
日期:2013.5
Ring-opening reactions of cyclopropenedicarboxylates with organolithiums and organozincs have been studied. Organolithiums and dialkyl- or diphenylzincs afforded a series of 1-alkenyl malonates with attack occurring by the organic group from the organometallic reagent at the less substituted sp2-hybridized carbon of the cyclopropene moiety. Mechanistic studies proved both anion and dianion intermediates
已经研究了环丙烯二羧酸盐与有机锂和有机锌的开环反应。有机锂和二烷基或二苯基锌提供了一系列 1-链烯基丙二酸酯,在环丙烯部分较少取代的 sp2 杂化碳上受到有机金属试剂的有机基团的攻击。机理研究证明阴离子和二价阴离子中间体都参与了与有机锂的反应。苯基环丙烯二羧酸酯和苯基溴化锌进行开环二聚反应得到 1,4-烯炔产物。