作者:Idália H.S. Estevam、Margarete F. da Silva、Lothar W. Bieber
DOI:10.1016/j.tetlet.2005.08.139
日期:2005.10
halides undergo smooth aminomethylation by secondary amines and aqueous formaldehyde promoted by metallic zinc under copper(I) catalysis. Good to excellent yields are obtained with primary, secondary, and tertiary iodides, allylic, propargylic, and benzylic bromides and with α-bromoesters. In most cases, DMSO is the best solvent, but dioxane is preferable for some more reactive halides. Additional experiments
在铜(I)催化下,有机卤化物可通过仲胺和甲醛水溶液(由金属锌促进)进行平滑的氨甲基化反应。用伯,仲和叔碘化物,烯丙基,炔丙基和苄基溴化物以及α-溴代酸酯可获得良好或优异的收率。在大多数情况下,DMSO是最好的溶剂,但对于一些更具活性的卤化物,二恶烷是优选的。使用自由基猝灭剂和促进剂的其他实验以及“自由基钟”的使用表明,逐步反应机理是由烷基自由基攻击亚胺离子引发的。