Reactions of vinylsilanes with lewis acid-activated iodosylbenzene: stereospecific syntheses of vinyliodonium tetrafluoroborates and their reactions as highly activated vinyl halides
作者:Masahito Ochiai、Kenzo Sumi、Yoshikazu Takaoka、Munetaka Kunishima、Yoshimitsu Nagao、Motoo Shiro、Eiichi Fujita
DOI:10.1016/s0040-4020(01)86659-x
日期:1988.1
salts behave like the highly activated species of vinyl iodides due to the high leaving ability of the iodine(III) substituents. Thus, a variety of substituted olefins including α-cyano and α-nitro olefins, vinyl sulfides, vinyl halides, and α,β-unsaturated esters, were synthesized from under mild conditions. A ligand coupling mechanism via the formation of 10-I-3 intermediate containing a copper(III)
烯基(苯基)碘化四氟硼酸酯是通过烯基硅烷与碘基苯和三氟化硼-二乙醚或四氟硼酸三乙基氧鎓反应而合成的。反应立体定向进行,保留了α-环糊精的结构。(4-叔丁基环己烯基)苯基碘鎓四氟硼酸盐()的X射线衍射分析显示,T形排列扭曲的高离子结构。由于碘(III)取代基的高离去能力,碘鎓盐的行为类似于高度活化的乙烯基碘。因此,合成了包括α-氰基和α-硝基烯烃,乙烯基硫化物,乙烯基卤化物和α,β-不饱和酯在内的各种取代烯烃。在温和的条件下。提出了通过形成含有铜(III)配体的10-I-3中间体的配体偶联机理,以用亲核试剂取代。