An efficient annulative coupling of benzoic acids with vinyl sulfone is developed based on weak carboxylate‐assisted Ru^II‐catalyzed ortho C−H bond activation, delivering sulfone containing phthalides in high yields (up to 92 %). The protocol features operational simplicity, mild conditions, and broad substrate scope with wide functional groups tolerance. The synthetic utility was highlighted through the preparation of biologically relevant 3‐ylidenephthalide scaffolds. This work represents the first example of Ru^II‐catalyzed annulation of benzoic acid with aryl vinyl sulfone.

中文翻译：

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RuII通过弱羧酸盐辅助的C-H键活化催化苯甲酸与乙烯基砜的环向偶联

基于弱羧酸盐辅助的Ru ^II催化邻位CH键活化，开发了苯甲酸与乙烯基砜的高效环偶联反应，可高产率（高达92％）提供含砜的邻苯二甲酸酯。该协议具有操作简便，条件温和，底物范围广，功能基团耐受性强等特点。通过制备生物学上相关的3-亚萘基支架突出了合成的实用性。这项工作代表了Ru ^II催化苯甲酸与芳基乙烯基砜环化的第一个例子。