Sodium Bicarbonate → HCID 23019635, compound

Participants

Reaction Steps

54 mg of ethyl 8-(4-aminophenyl)-1-cyclopropyl-9-methyl-4-oxo-4H-quinolizine-3-carboxylate (Example 2) was dissolved in a mixture of 3 ml of acetic acid and 2 ml of water. 2 ml of an aqueous solution of 19 mg of sodium cyanate was added to the obtained solution at 35° C. and they were stirred at that temperature for 3 hours. The reaction mixture was poured into a saturated aqueous sodium hydrogencarbonate solution. After the extraction with chloroform, the organic layer was dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by the silica gel column chromatography (eluent: chloroform/methanol=20/1) to obtain 53 mg of ethyl 1-cyclopropyl-9-methyl-4-oxo-8-(4-ureidophenyl)-4H-quinolizine-3-carboxylate.

Provenance & Evidence