Green Synthesis of Novel substituted 2-(1, 3-diphenyl-1H-pyrazol-3-yl) benzo [d] thiazole and using Ionic Liquid under Ultrasound and Microwave Condition
Keywords:
1, 3-diaryl pyrazole aldehyde, Microwave, Ultrasound, Thiazole, [BMIM][BF4].Abstract
A green protocol for the synthesis of series of novel substituted 2-(1, 3-diphenyl-1H-pyrazol-3-yl) benzo [d] thiazole is developed through the condensation of substituted 1, 3-diaryl pyrazole aldehyde and o-amino thiophenol in the presence of 1-butyl,3-methyl,1-imidazolium tetrafloroborate [BMIM][BF4] as a catalyst under the conventional reflux condition, ultrasound and Microwave irradiation. The use of [BMIM][BF4] under USI and MWI conditions, and with easier isolation of the products in good yields makes this protocol eco-friendly and versatile compared to the conventional reflux conditions. The structures of the products were confirmed by IR, Mass, 1H-NMR, 13C- NMR spectral data.
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