有机胂化合物的研究ⅩⅩ.溴化苄基三苯鉮的合成及其与醛、酮的反应

Studies on organoarsenic compounds ⅩⅩ.Synthesis of benzyltriphenylarsonium bromide and its reaction with aldehydes and ketones

溴化苄基三苯鉮的合成及其与醛、酮的反应。在C_6H_6(或 CH_2Cl_2)～50%NaOH(aq)体系中进行相转移催化反应,得立体选择性的烯烃衍生物,而在CH_3OH/CH_3ONa(或 DMF/CH_3ONa)体系中反应,则得环氧乙烷和烯烃衍生物的混合物,溶剂对产物的生成有一定的影响。

This paper presents the reaction of arsonium salt1 with aldehydes and ketones in the two-phase systemof C_6H_6(or CH_2Cl_2)-50% NaOH(aq) to afford stereos-electively olefines(3a～1) and in the system ofCH_3OH/CH_3ONa (or DMF/CH_3ONa) to afford epo-xides(5a～d) and oiefines (3a～b).We also foundthat solvent effects exist in this reaction.