The reaction of excess phenylselenenyl halides with trisubstituted cyclic olefins in aqueous acetonitrile is regio- and stereospecific and affords halohydrins in excellent yields. The reaction proceeds through the formation of a β-hydroxyalkyl phenyl selenide which evolves to halohydrin presumably an epoxy-intermediate.
过量的苯基
硒烯基卤化物与三取代的环烯烃在
乙腈水溶液中的反应具有区域和立体特异性,并以优异的产率提供卤代醇。反应通过形成β-羟烷基苯基
硒化物而进行,该β-羟烷基苯基
硒化物发展为卤代醇,大概是环氧中间体。