A general and practical method of synthesis of 2-disubstituted-1-chloro- and 1-bromoenamines
作者:Léon Ghosez、Isabelle George-Koch、Luc Patiny、Marc Houtekie、Philippe Bovy、Prosper Nshimyumukiza、Thao Phan
DOI:10.1016/s0040-4020(98)00558-4
日期:1998.7
been prepared by the reaction of tertiary amides with phosgene. The toxicity of the latter led us to systematically investigate new synthetic routes towards α-chloro- and α-bromoenamines. The reactions of various halogenating agents (SOCl2, diphosgene, triphosgene, OPCl3, OPBr3) with tertiary amides followed by the addition of triethylamine have been studied. Thionyl chloride was found unsuitable for
二取代的α-氯亚胺是有用的合成中间体,其早先是通过叔酰胺与光气反应制备的。后者的毒性使我们系统地研究了合成α-氯代和α-溴代烯胺的新途径。研究了各种卤化剂(SOCl 2,双光气,三光气,OPCl 3,OPBr 3)与叔酰胺的反应,然后添加了三乙胺。发现亚硫酰氯不适合制备α-氯亚胺。在其他卤化剂中,OPCl 3和OPBr 3被发现是最实用的。该方法的一般性可通过合成15种α-氯烯胺和6种α-溴烯胺来说明。