A Phosphotungstate Catalyst with Both Brønsted and Lewis Acid Sites for Synthesis of Bis(indolyl)methane Derivatives
The Friedel–Crafts alkylation of indoles with aldehydes is a key method for synthesizing bis(indolyl)methanes (BIMs). With the expanding applications of BIMs in medicine and agriculture, the development of new catalytic strategies to facilitate their synthesis has attracted increasing attention. In this study, we rep...