Reactions of azoalkenes derived from hydrazones of ethyl bromopyruvate with electron rich alkenes and heterocycles
作者:Simon J. Clarke、Thomas L. Gilchrist、Américo Lemos、Tony G. Roberts
DOI:10.1016/s0040-4020(01)80992-3
日期:1991.7
Three hydrazones of ethyl bromopyruvate, the dinitrophenylhydrazone 2a, the toluene-4-sulphonylhydrazone 2b and the t-butoxycarbonylhydrazone 2c, have been reacted with a series of nucleophilic alkenes and heterocycles in the presence of sodium carbonate. Azoalkenes 3 are presumed as intermediates and adducts have been isolated. The azoalkenes derived from hydrazones 2a and 2c are found to be useful
溴代丙酮酸乙酯的三,二硝基苯hydr 2a,甲苯-4-磺酰基hydr 2b和叔丁氧羰基2 2c在碳酸钠的存在下与一系列亲核烯烃和杂环反应。假定偶氮烯烃3为中间体,并且已分离出加合物。从腙衍生azoalkenes 2A和2C被发现是有用的亲电子和电二烯。