4-dihydroisocoumarin-4-carboxylic acid in good to excellent yield. Under these conditions we did not observe the formation of Perkin-type products. The reaction can be extended to a wide variety of aldehydes and to some ketones in synthetically useful yields. Amides can be obtained in good yields after activation of the carboxylic function with DCC at O°C.
在
三氟化硼-
乙醚络合物的存在下,全
邻苯二甲酸酐与
苯甲醛反应生成环加合物3-苯基-3,4-二氢异
香豆素-4-
羧酸,收率良好至极佳。在这些条件下,我们没有观察到Perkin型产品的形成。该反应可以以合成上有用的产率扩展到各种各样的醛和一些酮。在0°C下用
DCC活化羧基官能团后,可以以高收率获得酰胺。