A Negishi type coupling is reported allowing access to methyl 3-aryl (heteroaryl) coumalates. The synthesis of methyl coumalate adducts is characterized by a low catalyst loading, high functional tolerance, and high yields.

中文翻译：

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通过 Pd 催化的 Negishi 偶联有效制备 2-Oxo-3-芳基（杂芳基）-2H-吡喃-5-羧酸甲酯

据报道，Negishi 型偶联允许获得甲基 3-芳基（杂芳基）香豆酸酯。香豆酸甲酯加合物的合成具有催化剂负载量低、功能耐受性高和产率高的特点。