The invention of radical reactions. Part XVIII. Decarboxylative radical addition to arsenic, antimony, and bismuth phenylsulphides - a novel synthesis of nor-alcohols from carboxylic acids
作者:Derek H.R. Barton、Dominique Bridon、Samir Z. Zard
DOI:10.1016/s0040-4020(01)80092-2
日期:1989.1
Carbon centered radicals obtained by decarboxylative transformation of suitable thiohydroxamate esters react with group Va trisphenyl-sulphides to give intermediates of general formula R-M(SPh)2 (M = As, Sb, Bi). These react spontaneously with air to give the corresponding alcohols. This procedure is especially useful in the case where M=Sb. It is thus sufficient to stir the thiohydroxamate ester with
通过合适的硫代异羟肟酸酯的脱羧转化获得的碳中心自由基与Va三苯基硫化物基团反应,得到通式RM(SPh)2(M = As,Sb,Bi)的中间体。它们与空气自发反应,得到相应的醇。在M = Sb的情况下,此过程特别有用。因此,将硫代异羟肟酸酯与三(苯硫基)-锑在空气中搅拌就足够了,直接且高收率地得到正壬醇。中间有机准金属也可以用二氧化氮氧化,以产生期望的硝基烷,尽管收率仅适中。实际上可以分离出相应的衍生自3,3-二苯基丙酸的有机铋中间体,从而为提出的机理提供了有力的证据。