Salen-based hypercrosslinked polymer-supported Pd as an efficient and recyclable catalyst for C–H halogenation

Abstract

In this work, we report the first use of a salen-based hypercrosslinked polymer-supported Pd catalyst to carry out C–H halogenation. This catalyst can effectively catalyze C–H bromination and chlorination even better than its homogeneous counterpart Pd(OAc)₂. It also showed excellent reusability without loss of catalytic activity for ten cycles. A broad substrate scope was explored and moderate to excellent yields were obtained.