An efficient synthesis of N-substituted indoles from indoline/indoline carboxylic acid via aromatization followed by C–N cross-coupling reaction by using nano copper oxide as a recyclable catalyst
作者:K. Harsha Vardhan Reddy、G. Satish、K. Ramesh、K. Karnakar、Y.V.D. Nageswar
DOI:10.1016/j.tetlet.2012.04.012
日期:2012.6
new and elegant protocol for the synthesis of 1-substituted indoles was developed via aromatization of indoline/indoline carboxylic acid followed by C–N cross-coupling with various aryl halides in the presence of nano CuO as a recyclable catalyst, Cs2CO3 as a base in DMSO at 80 °C. 1-Substituted indoles were obtained in good to excellent yields and the catalytic system can be recycled up to four cycles
通过将二氢吲哚/二氢吲哚羧酸芳构化,然后在作为可回收催化剂的纳米CuO Cs 2 CO 3的存在下,与各种芳基卤化物进行C–N交叉偶联,开发了一种新的且优雅的合成1-取代的吲哚的方案。在80°C下用作DMSO的碱。得到的1-取代的吲哚的收率高至优异,催化体系最多可循环使用四个循环而不会损失催化活性。