Rh-Catalyzed Synthesis of Coumarin Derivatives from Phenolic Acetates and Acrylates <i>via</i> C–H Bond Activation
作者:Sunita K. Gadakh、Soumen Dey、Arumugam Sudalai
DOI:10.1021/acs.joc.5b01713
日期:2015.11.20
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。