Sodium Bicarbonate → 2-(2-Aminothiazol-4-yl)-4-chlorophenol

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Reaction Steps

A mixture of 2-bromo-1-(5-chloro-2-hydroxyphenyl)ethanone (156.9 mg, 0.63 mmol), thiourea (47.9 mg, 0.63 mmol) and ethanol (3 mL) was refluxed for 2 hours. After the reaction mixture was cooled to room temperature, it was poured into saturated sodium hydrogen carbonate solution and extracted with ethyl acetate. After the ethyl acetate layer was washed with brine and dried over anhydrous sodium sulfate, the residue obtained by evaporation of the solvent under reduced pressure was purified by column chromatography on silica gel (n-hexane:ethyl acetate=2:1) to give the title compound (98.6 mg, 64.5%) as a light yellowish white powder.

Provenance & Evidence