Directed aromatic C–H functionalization of N-arylcarbamates and quinazolinones catalyzed by palladium nanoparticles supported on nitrogen-doped graphene

Abstract

Pd nanoparticle‑nitrogen doped reduced graphene oxide (Pd/N-RGO) nanohybrid was successfully utilized for the C-H-acyloxylation of N-arylcarbamates and the CH halogenation of quinazolinones with N-halosuccinimides. The use of the catalyst was shown to be a highly efficient, less time-consuming and recyclable procedure for two different types of CH functionalization; it was even better than Pd(OAc)2 as its homogeneous counterpart. Additionally, the effect of introducing nitrogen into the graphene lattice on the catalytic activities of palladium was evaluated by synthesizing Pd nanoparticles-reduced graphene oxide. The catalyst exhibited no significant palladium leaching; so, it was successfully recovered and reused in ten consecutive runs without any noticeable decrease in its catalytic activity.