Preparation of Nonsymmetrically Substituted Stilbenes in a One-Pot Two-Step Heck Strategy Using Ethene As a Reagent.

[摘要]：47 A strategy for the prepn. of nonsym. substituted stilbenes using a one-pot two-step double Heck strategy is presented. First a protocol is developed for the selective prepn. of a range of styrenes using ethene as the alkene coupling partner. Then conditions are found for the effective coupling of the styrenes with aryl halides using a 1:1 stoichiometric ratio of the two components. The use of the microwave app. to perform the reactions offers a convenient method for synthesis as well as for safely, easily, and accurately loading vessels with gaseous reagents.

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