3-disubstituted phthalides is reported. A successive reaction process begins with the TfOH-catalyzed cyclization of o-alkynylbenzoic acids followed by an ortho-regioselective electrophilic alkylation of various electron-rich aromatic compounds or alkenes, which has been successfully developed. The corresponding regioselective products of 3-substituted phthalide were obtained in good to high yields.
报道了一种合成 3,3-二取代
苯酞的简便新方法。连续的反应过程从 TfOH 催化的邻炔基
苯甲酸环化开始,然后是各种富电子芳香族化合物或烯烃的邻位选择性亲电烷基化,该过程已成功开发。以良好至高产率获得了相应的3-取代
苯并呋喃酮区域选择性产物。