Sawdust supported N-heterocyclic carbene-nickel complex has been prepared by covalent
grafting of 1-methyl imidazole in the matrix of chloropropyl modified sawdust followed by reaction
with nickel acetate. The resultant NHC-Ni complex was employed as a heterogeneous catalyst for the
synthesis of 2-substituted benzoxazoles from benzoxazole and aryl boronic acids following C-H activation
strategy. The recycling experiments showed that the complex could be reused for five consecutive
runs without significant loss in the yield of products.
Keywords: C-H activation, N-Heterocyclic carbene, sawdust, benzoxazole, reusability, heterogeneous analogues.
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