Potassium Carbonate → (S)-ethyl 6-bromo-1-(1-(2-morpholinoethyl)piperidin-3-yl)-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

(S)-ethyl 6-bromo-4-oxo-1-(piperidin-3-yl)-1,4-dihydro-1,8-naphthyridine-3-carboxylate hydrochloride Intermediate 33, 0.400 g, 0.96 mmol) and K2CO3 (0.663 g, 4.80 mmol) were taken up in acetonitrile (3 mL) and 4-(2-bromoethyl)morpholine hydrochloride (0.221 g, 0.96 mmol) added. The reaction mixture was heated to 120° C. in the microwave for 30 min. The reaction mixture was cooled to room temperature and filtered, and the inorganics were washed with EtOAc two times. The solvent was removed in vacuo. (S)-ethyl 6-bromo-1-(1-(2-morpholinoethyl)piperidin-3-yl)-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate (0.420 g, 89%) was recovered as a tan solid and will be carried on without further purification. MS (ES)(M+H)+: 494 for C22H29BrN4O4.

Provenance & Evidence