Investigation of the activity of palladium nanoparticles supported on mesoporous graphitic carbon nitride in Heck and Suzuki cross-coupling reactions

Addressed herein is the effective catalytic performance of palladium nanoparticles supported on mesoporous graphitic carbon nitride (mpg-CN/Pd) for the Heck coupling reaction of alkenes with various aryl halides. The presented catalytic C–C bond formation reaction was carried out in a high-pressure glass tube for 4 hours in an aqueous solution EtOH/H2O (v/v 2/1). The corresponding alkene products were obtained in relatively high yields as E-selective under the optimized conditions. The catalyst's utility in the Suzuki cross-coupling reaction was also investigated under almost identical conditions. Moreover, these reactions proceeded smoothly with both electron-rich and electron-deficient aryl iodides and aryl bromides. The nanocatalyst can be recovered from the reaction medium by centrifugation. It can be reused by preserving approximately 92% of its initial catalytic activity after the five consecutive reactions.