Carbon-Carbon Bond Formation by Use of Chloroiodomethane as a C<sub>1</sub>Unit. I. Formation of Chloromethyltriphenylphosphonium Iodide, and Its Application for the Wittig Chloromethylenation of Aldehydes and Ketones
作者:Sotaro Miyano、Yu Izumi、Katsuo Fujii、Yutaka Ohno、Harukichi Hashimoto
DOI:10.1246/bcsj.52.1197
日期:1979.4
Chloromethyltriphenylphosphonium iodide has been prepared by the reaction of chloroiodomethane with triphenylphosphine. Upon treatment with potassium t-butoxide in t-butyl alcohol, the phosphonium iodide was converted into chloromethylenetriphenylphosphorane; this in turn was used for the Wittig reaction of aldehydes and ketones into the corresponding chloroolefins of the type RCH=CHCl and RR′C=CHCl in
氯甲基三苯基碘化鏻已通过氯碘甲烷与三苯基膦反应制备。用叔丁醇中的叔丁醇钾处理后,碘化鏻转化为氯亚甲基三苯基正膦;这反过来又用于醛和酮的 Wittig 反应,生成相应的 RCH=CHCl 和 RR'C=CHCl 类型的氯烯烃,收率良好至中等。这些氯烯烃的构型是根据 NMR 光谱研究确定的。使用鏻盐和过量的叔丁醇钾也可以将苯甲醛直接转化为苯乙炔。