Indoles, and pyrroles, and furans, oh my! Chiral phosphoric acidcatalyzed Friedel–Crafts alkylation of indoles with 3,3,3‐trifluoropyruvate gave the corresponding adducts in excellent yields with high enantioselectivities. Electron‐deficient indoles, in particular, exhibited excellent enantioselectivities.
Heterogeneously Organocatalytic, Enantioselective Friedel-Crafts Alkylation of Indole with 3,3,3-Trifluoropyruvate
作者:Pei Wang、Jinhui Ni、Yong An、Xiaojiang Chen、Weiwei Zhang、Yang Zhang、Guorong Ma
DOI:10.3987/com-21-14566
日期:——
amine-squaramide catalyst was synthesized with diphenylethylenediamine as the chiral framework and successfully catalyzed the asymmetric Friedel-Craftsalkylation reaction between indole and trifluoropyruvate. A series of trifluoromethylated indole derivatives were obtained with high yield (up to 95%) and moderate to good enantioselectivity (up to 76% ee). The reaction proceeds in heterogeneoussystem, the catalyst