Abstract
We describe herein our results for the multicomponent synthesis of 1,3,5-triaryl-4-(organylselanyl)pyrazoles by copper-catalyzed cyclocondensation and a direct CH bond selenation reaction of arylhydrazines, chalcones and diorganyl diselenides using catalytic amount of CuBr in acetic acid as solvent at reflux temperature. This methodology proved to be simple and efficient to furnish a range of 4-(organylselanyl)-1H-pyrazoles in moderate to good yields.
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