溴氯卡宾产生新方法及其机理的讨论  

A New Approach to the Generation of Bromochlorocarbene and the Corresponding Mechanism

作　　者：陶凤岗[1] 朱其妹 方屹[1] 艾慧[1] 许临晓[1] 张秀月[2] 

机构地区：[1]复旦大学化学系,上海200433 [2]上海第二教育学院,上海200433

出　　处：《有机化学》1993年第6期603-608,共6页Chinese Journal of Organic Chemistry

基　　金：国家自然科学基金

摘　　要：二卤卡宾中含不同卤素的杂二卤卡宾较为少见,它们主要以杂卤仿为原料制得。例如,用二氯溴甲烷可产生约1:3的溴氯和二氯卡宾;In the reaction of mixed polyhalohydrocarbons. such as bromoform-chloroform,bromoform-tetrachloromethane. bromoform-hexachloroethane. with strong bases underultrasonication and phase-transfer catalysis, three kinds of dihalocarbene. bromochlorocarbeneand dibromocarbene as well as dichlorocarbene. can be generated smoothly. In the presence ofolefins, the corresponding bromochlorocyclopropane derivatives can be obtained as main products in about 50% yields by changing the ratios of the mixed polyhalohydrocarbons.A free radical mechanism for the fast halogen exchanges is suggested in this paper.

关 键 词：溴 氯卡宾 卤素交换 相转移催化 

分 类 号：O626[理学—有机化学]