作者:Yang Li、Yali Liu、Di Hao、Chuntian Li、Yan Liu、Yanlong Gu、Luigi Vaccaro、Ping Liu
DOI:10.1016/j.tet.2021.132610
日期:2022.1
An efficient Cu(II)-catalyzed direct C–H trifluoromethylation of pyrrolo[1,2-a]quinoxalines with CF3SO2Na in the presence of K2S2O8 as an oxidant has been developed. A variety of C1-trifluoromethylated pyrrolo[1,2-a]quinoxalines can be obtained with moderate to good yields. Broad substrate range, excellent regioselectivity, and gram-scale synthesis are key features of this reaction. The further modification
已开发出在 K 2 S 2 O 8作为氧化剂存在下,用 CF 3 SO 2 Na对吡咯并[1,2- a ]喹喔啉进行有效的 Cu(II) 催化直接 C-H 三氟甲基化反应。各种 C1-三氟甲基化吡咯并[1,2- a ]喹喔啉可以以中等至良好的收率获得。广泛的底物范围、出色的区域选择性和克级合成是该反应的关键特征。还研究了三氟甲基化产物的进一步修饰。对照实验表明三氟甲基化过程可能涉及CF 3 -自由基机制。