Facile Access to 2-Substituted Benzoxazoles Using Sawdust Supported N-Heterocyclic Carbene-Ni Complex via C-H Activation,Letters in Organic Chemistry

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Facile Access to 2-Substituted Benzoxazoles Using Sawdust Supported N-Heterocyclic Carbene-Ni Complex via C-H Activation
Letters in Organic Chemistry ( IF 0.7 ) Pub Date : 2020-05-31 , DOI: 10.2174/1570178616666190705153927
Dolly Kale ₁ , Gajanan Rashinkar ₁ , Audumbar Patil ₁ , Arjun Kumbhar ₁ , Rajashri Salunkhe ₁

Affiliation

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.

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