Tetrazole-1-acetic acid was identified as an efficient ligand to promote copper-catalyzed domino reaction of ortho-iodo/bromo-anilines with β-keto esters/β-diketone for 2,3-disubstituted indoles' synthesis with high yields under mild conditions. The protocol, with easy-available catalytic system, shows good substrate tolerance towards various functional groups.
经鉴定,
四唑-1-乙酸是促进邻位
碘/
溴代
苯胺与β-
酮酯/
β-二酮的
铜催化多米诺反应的有效
配体,在温和的条件下可高产率地合成2,3-二取代的
吲哚情况。该协议具有易于使用的催化系统,显示出对各种官能团的良好底物耐受性。