Treatment of diphenyl diselenide with tributylphosphine in an alkaline medium forms phenylselenolate ion which converts alkyl halides, α,β-unsaturated ketones, and epoxides into alkyl selenides, (phenylseleno)alkenones, and β-(phenylseleno) alkanols, respectively, in high yield. Selenation of 3α-bromocholestane gives 3β-(phenylseleno)cholestane with complete inversion of the configuration.
二苯二
硒与
三丁基膦在碱性介质中反应形成苯基
硒负离子,该离子能够将烷基卤化物、α,β-不饱和酮和
环氧化物转化为烷基
硒化物、(苯基
硒)烯酮和β-(苯基
硒)烷醇,且产率较高。对3α-
溴胆甾烷的
硒化反应可得到3β-(苯基
硒)胆甾烷,并且配置完全反转。