Facile Access to Polysubstituted Indoles via a Cascade Cu-Catalyzed Arylation−Condensation Process
作者:Yu Chen、Xiaoan Xie、Dawei Ma
DOI:10.1021/jo702059q
日期:2007.11.1
hydrolysis delivered 2,3-disubstituted indoles. The halides bearing a strong electron-withdrawing group in the 4-position can undergo in situ basic hydrolysis to provide the corresponding indoles. Polysubstituted indoles can be prepared from substituted 2-halotrifluoroacetanilides with high regioselectivity.
CuI / l-脯
氨酸催化的2-卤代
三氟乙酰苯胺与β-
酮酯和酰胺的交叉偶联,然后进行原位酸性
水解,生成了2,3-二取代的
吲哚。在4-位带有强吸电子基团的卤化物可进行原位碱性
水解以提供相应的
吲哚。可以由具有高区域选择性的取代的2-卤代
三氟乙酰苯胺制备多取代的
吲哚。