An efficient annulation strategy involving the reaction of phenolic acetates with acrylates in the presence of [Rh2(OAc)4] as catalyst and formic acid as reducing agent, leading to the high yield synthesis of coumarin derivatives, has been developed. The addition of NaOAc as a base increased the yield of the products. The reaction is quite successful for both electron-rich as well as electron-deficient
已经开发出一种有效的环化策略,该方法涉及在[Rh 2(OAc)4 ]作为催化剂和
甲酸作为还原剂的存在下使
酚醛乙酸酯与
丙烯酸酯反应,从而导致
香豆素衍
生物的高收率合成。加入NaOAc作为碱提高了产物的产率。该反应是相当成功二者以及缺电子的
酚乙酸酯,得到具有优良的区位选择性
香豆素,并且进行富电子通过C-H键活化由
氘掺入研究证实。