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首页> 外文期刊>Chemistry: A European journal >Switching the Photochromic Activity of Acenaphthylene Derivatives through a Tandem Nucleophile-Promoted Addition Reaction
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Switching the Photochromic Activity of Acenaphthylene Derivatives through a Tandem Nucleophile-Promoted Addition Reaction

机译：通过串联亲核试剂促进的加成反应切换Ac衍生物的光致变色活性

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摘要

New acenaphthylene-based dithienylethenes have been prepared. Surprisingly they did not show photochromism. However, they readily underwent a tandem addition of a nucleophile and an electrophile, leading to a small library of dearomatized colourless analogues, which, on the contrary, were endowed with photochromic activity. In the absence of the electrophile, the intermediate obtained by C-attack readily aromatizes to give, surprisingly, a final product of direct aromatic nucleophilic substitution, which was not photochromically active.
机译：已经制备了新的基于ena的二噻吩基乙烯。令人惊讶的是，它们没有显示出光致变色现象。但是，他们很容易串联加入亲核试剂和亲电试剂，从而形成了一个小型的脱芳香化无色类似物库，相反，它们具有光致变色活性。在不存在亲电子试剂的情况下，通过C-攻击获得的中间体易于芳构化，令人惊讶地得到直接芳族亲核取代的最终产物，其没有光致变色活性。

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