A simple and efficient Lewis acid mediated C-C coupling
reaction between readily available 2-hydroxy-2-(trifluoromethyl)-2H-chromenes and various indoles via regioselective nucleophilic
substitution has been developed. On the basis of this methodology,
a series of bio- and pharmacologically important 2- and 4-functionalized
2-(trifluoromethyl)-2H-chromenes were
prepared in high yields.
regioselective - C-C bond formation - 2H-chromenes - indoles - Lewis
acid