Potassium Carbonate → HCID 11118300, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of N-(2-hydroxyphenyl)-2-bromo-4,5-dimethyl-3-thiophenecarboxamide (3.3 g) in dimethyl sulfoxide (50 ml) was added potassium carbonate (2.8 g) and the mixture was stirred at 160-170° C. for 20 minutes. The reaction system was cooled to room temperature and the reaction mixture was poured into water-ethyl acetate. The insoluble matter was filtrated and the filtrate was extracted with ethyl acetate, washed with water and dried over magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1) to give 2,3-dimethylthieno[2,3-b][1,5]benzoxazepin-4(5H)-one (1.4 g).

Provenance & Evidence