A highly active recyclable gold-graphene nanocomposite material for oxidative esterification and Suzuki cross-coupling reactions in green pathway.
A graphene based composite with gold nanoparticles has been synthesized via a simple chemical route and the structure and compositions of nanocomposite has been characterized. The catalyst was found to be remarkably stable and active for the oxidative esterification of alcohols under present reaction conditions using molecular oxygen as green oxidant and Suzuki cross-coupling reactions between aryl halides and phenylboronic acids using environmentally friendly water as solvent. The versatility of both the protocols was demonstrated by taking a number of substrates. This protocol offers several advantages like high yields, clean reactions, recyclability of the catalyst, reaction in water and use of green oxidant. This study suggests graphene, as an economical substitute for carbon nanotubes, could act as a prominent support in heterogeneous catalysis.
Department of Chemistry, University College of Science, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, W.B., India; Department of Chemistry, University of Kalyani, Kalyani, Nadia 741235, W.B., India.
Paramita
P
Mondal
Department of Chemistry, University of Kalyani, Kalyani, Nadia 741235, W.B., India.
Noor
N
Salam
Centre for Advanced Materials, Indian Association for the Cultivation of Science, Kolkata 700032, W.B., India.
Avijit
A
Mondal
Department of Chemistry, University of Kalyani, Kalyani, Nadia 741235, W.B., India.
Kajari
K
Ghosh
Department of Chemistry, B.S. College, Tangrakhali, Canning, S-24PGS, 743329, W.B., India.
K
K
Tuhina
Department of Chemistry, University of Kalyani, Kalyani, Nadia 741235, W.B., India. Electronic address: manir65@rediffmail.com.
Sk Manirul
SM
Islam
Gold nanoparticle; Graphene; Oxidative esterification; Suzuki cross-coupling reactions