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- فارسی
Palladium Supported on Mesoporous Silica/Graphene Nanohybrid as a Highly Efficient and Reusable Heterogeneous Catalyst for C− H Functionalization
M. Dabiri*, S.I. Alavioon, S.K. Movahed (2018) ChemistrySelect 3, 3487-3494.
https://doi.org/10.1002/slct.201800165
Abstract
Mesoporous silica/graphene (KIT-6/G) with pendent 3-mercaptopropyl groups has been prepared by condensation of surface silanols and (3-mercaptopropyl)trimethoxysilane (MPTMS). Treatment of the mercaptopropylated with Pd(CH3CN)2Cl2 gave a heterogeneous Pd-catalyst (Pd@KIT-6/G-SH). The catalytic activity of the catalyst was investigated in two types of C−H functionalized for the synthesis of 2-cyanoacetanilide and 2-arylpyridine 1-oxide derivatives via C−H activation. Additionally, for the study of the effect of thiol ligand, the Pd@KIT-6/G was prepared from the treatment of Pd(CH3CN)2Cl2with KIT-6/G. The catalyst has been successfully recovered and reused without loss of activity over seven cycles of reactions.