tetraarylmethanes in a single operation. The transformation would proceed via an intermolecular SNAr reaction of the dioxides with cyclic diarylmethylpotassium followed by intramolecular SNAr cyclization. This straightforward strategy provides a wide range of spirocyclic diarylfluorenes including unusual ones that are otherwise difficult to synthesize.
在KN(SiMe 3)2存在下用环状二芳基
甲烷处理
二苯并噻吩二氧化物导致在单个操作中形成
芴基螺环四芳基
甲烷。所述转化将通过二氧化物与环状二芳基甲基
钾的分子间S N Ar反应,然后进行分子内S N Ar环化而进行。这种简单的策略可提供多种螺环二芳基
芴,包括难于合成的不寻常的螺环。