Potassium Carbonate → 5,6-Bis(4-methoxyphenyl)-2,3-dihydroimidazo[2,1-b][1,3]thiazole

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Reaction Steps

A mixture of 46.8 g (0.15 mole) of 4,5-bis(p-methoxyphenyl)-2-mercaptoimidazole, 55.5 g (0.15 mole) of ethylene glycol di-p-toluenesulfonate [Helv. Chim Acta 29 1675 (1946); Chem Abs. 41 1641 g] and 45.5 g (0.33 mole) potassium carbonate in 500 ml dimethylformamide was stirred at room temperature for 3 days. The mixture was poured into ice water and the precipitated product was collected and washed with water. Recrystallization from 1200 ml ethanol gave 31.3 g (61%) of product, m.p. 155°-8°.

Provenance & Evidence