Sodium carbonate-mediated facile synthesis of 4-substituted-2-(3,5-dimethylpyrazol-1-yl)thiazoles under solvent-free conditions
摘要:
An efficient and facile synthesis of 4-substituted-2-(3,5-dimethylpyrazol-1-yl)thiazoles 3 was achieved by grinding an equimolar mixture of alpha-haloketones 2 with 3,5-dimethylpyrazol-1-thiocarboxamide 1 in the presence of sodium carbonate under the solvent-free conditions. The present methodology offers an eco-friendly, mild, efficient (92-96%), and rapid method (5 min) for the synthesis of 3 besides preventing the formation of alpha-thiocyanatoketones as reported earlier in solvent-mediated conditions.[GRAPHICS].
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