关键词: 联萘二砜, 二苯并[c, g]菲, 反应机理, 分子内亲核取代, 消除反应

Abstract: We reported that a benzyl-type binaphthyl disulfone could be conveniently converted into dibenzophenanthrene. Thus, racemic 1 was treated with lithium diisopropylamide (LDA) afforded dl-dibenzophenanthrene in a moderate yield, together with an unknown benzensulfonyl-substituted derivative 2. The structures were confirmed by MS, ¹H, ¹³CNMR and elemental analysis. The reaction might involve the initiaLIntramolecular nucleophilic substitution to produce an intermediate 3, followed by elimination of benzenesulfinic acid to form dibenzophenanthrene.

Key words: Binaphthyl disulfone, Dibenzophenanthrene, Reaction mechanism, Intramolecular nucleophilic substitution, Elimination=