本文研究具有拉电子取代基的砷叶立德甲氧羰基亚甲基三苯基肿与六种酮反应的立体化学,指出溶剂、反应物摩尔比、反应温度、反应时间及溴化钠的存在,对烯属产物的E式和Z式比例影响不大,然而受体的结构则影响很大,特别是在羰基邻位有一个叔丁基时,能得到99％立体专一的E式烯属产物。 In this paper, the stereochemistry of the reaction of arsenic, ylide, methoxycarbonylmethylidenetriphenylphenyl and hexanones with electron-withdrawing substituents was investigated. The solvent, molar ratio of reactants, reaction temperature, reaction time and the presence of sodium bromide were pointed out. There is little effect on the E and Z ratios of the olefinic products, however, the structure of the acceptor is greatly affected, especially when there is a t-butyl group ortho to the carbonyl group, which gives 99% stereospecific E-type olefins product.