Triethylamine → 2-Thiazolamine, 4-(4-methoxyphenyl)-5-(3-pyridinyl)-

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To a suspension of thiourea (516 mg) in acetonitrile (40 mL), was added 2-bromo-1-(4-methoxyphenyl)-2-(3-pyridyl)ethanone hydrobromide (2.5 g), and then triethylamine (0.95 mL) was added slowly dropwise to the mixture with stirring. After addition, the mixture was stirred at reflux for 3 h. After cooling, the crude crystalline was collected by filtration. The crystalline was washed with an aqueous saturated solution of sodium hydrogen carbonate, water, ethanol, and ethyl ether, in that order, and dried. The obtained crude crystalline was recrystallized from tetrahydrofuran to give the title compound (1.5 g, yield 90%).

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