Citation: Ravibabu Velpula, Janardhan Banothu, Rajitha Gali, Rajitha Deshineni, Rajitha Bavantula. 1-Sulfopyridinium chloride: Green and expeditious ionic liquid for the one-pot synthesis of fused 3,4-dihydropyrimidin-2(1H)-ones and thiones under solvent-free conditions[J]. Chinese Chemical Letters, ;2015, 26(3): 309-312. doi: 10.1016/j.cclet.2014.11.030
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1-Sulfopyridinium chloride portrayed as an efficient and recyclable ionic liquid for the synthesis of fused 3,4-dihydropyrimidin-2(1H)-ones and thiones via a modified Biginelli reaction involving one-pot three component condensation of 6-methoxy-1-tetralone, arylaldehydes and urea/thiourea under solventfree conditions. Analytically pure products are formed within 10-20 min in excellent yields.
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