Coumarin-based triazoles were synthesized from 2-azido-N-phenylacetamide and terminal acetylenic compound by click chemistry. Whereas the CuSO4 used catalyts and sodium ascorbate used as a reducant affords only the favourable 1,4-regioisomer of triazole. Here DMF + t-BuOH + water used as a solvent.
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