Ammonia → HCID 22063748, compound

Participants

Reaction Steps

The 1-(2-fluoroethyl)-7-[(E)-2-(4-isopropyl-1,3-thiazol-2-yl)-1-ethenyl]-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid (174 mg, 0.450 mmol) obtained in (B) was dissolved in dimethylformamide (3 ml), added with triethylamine (0.126 ml, 0.900 mmol) and ethyl chloroformate (0.086 ml, 0.900 mmol) under ice cooling, and then the mixture was stirred for 1 hour. The reaction mixture was warmed to room temperature, stirred for 30 minutes and further stirred at 0° C. for 1 hour. The reaction mixture was added with concentrated aqueous ammonia (0.15 ml) and stirred overnight at room temperature. The reaction mixture was diluted with ethyl acetate and washed successively with aqueous citric acid, saturated aqueous sodium hydrogencarbonate and saturated brine and dried over anhydrous magnesium sulfate. Then, the solvent was evaporated to obtain the title compound (164 mg, 94%) as pale yellow solid.

Provenance & Evidence