Treatment of certain benzylic selenonium salts with a variety of bases resulted in nucleophilic attack to yield either an alkylation or a benzylation of the base, while the use of sodium amide in liquid ammonia as base generated a selenonium ylide which gave ortho substitution of the benzyl group via[2,3]sigmatropic rerrangement.
                                    用各种碱某些苄基
硒鎓盐的治疗导致在亲核攻击,以产生烷基化或基座的苄基化,而在液
氨中使用
氨基钠作为碱生成由此获得
硒叶立德邻苄基的取代通过[2,3]σ重排。