Trimethylsilyldiazomethane in the preparation of diazoketones via mixed anhydride and coupling reagent methods: a new approach to the Arndt–Eistert synthesis
作者:Jožko Cesar、Marija Sollner Dolenc
DOI:10.1016/s0040-4039(01)01458-7
日期:2001.10
thane with a mixed anhydride derived from a carboxylic acid by the action of ethyl chloroformate, yields the corresponding diazoketone in high yield. Subsequent Wolff rearrangement of the diazoketone leads to the homologated ester. Reaction of trimethylsilyldiazomethane with carboxylic acid–dicyclohexylcarbodiimide mixtures leads to the formation of diazoketone and trimethylsilylmethyl ester in equimolar
三甲基甲
硅烷基
重氮甲烷与衍生自
羧酸的混合酸酐在
氯甲酸乙酯的作用下反应,以高收率得到相应的重
氮酮。随后重
氮酮的沃尔夫重排产生了同源酯。三甲基甲
硅烷基
重氮甲烷与
羧酸-二环己基碳二
亚胺混合物的反应可通过酸酐中间体等摩尔比形成重
氮酮和三甲基甲
硅烷基甲基酯。该酸的N-羟基琥珀
酰亚胺酯不与三甲基甲
硅烷基
重氮甲烷或其反应性更高的
锂化衍
生物反应。