Water → ethyl(2E)-3-(1,2,3-benzothiadiazol-7-yl)acrylate

Beteiligte Stoffe

Reaktionsschritte

To a suspension of 55% sodium hydride (1.81 g, 41.5 mmol) in tetrahydrofuran (30 mL) was added a solution of ethyl diethylphosphonoacetate (8.31 mL, 41.5 mmol) in tetrahydrofuran (10 mL) at 0° C. and the mixture was stirred for 20 min. To the reaction mixture was added a solution of 1,2,3-benzothiadiazole-7-carbaldehyde (6.20 g, 37.8 mmol) in tetrahydrofuran (60 mL) at 0° C. and the mixture was stirred at room temperature for 4 hr. Water was added and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, and dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane=1/1) and recrystallization (ethyl acetate/hexane) to give the title compound (8.70 g, yield 98%).

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