Potassium Carbonate → HCID 59415816, compound

Participants

Reaction Conditions

Reaction Steps

3-Amino-1-N-Boc-piperidine (2.5 g, 12.5 mmol) was added to the solution of (Z)-ethyl 3-(dimethylamino)-2-(3-iodobenzoyl)acrylate (Intermediate 24, 0.34M, 34 mL, 11 3 mmol) and heated at 50° C. for 3 h. The solvent was removed in vacuo and the residue was dried in a vacuum oven for 1.5 h. The residue was then dissolved in dimethyl formamide (20 mL) and potassium carbonate powder (2.2 g, 15.8 mmol) was added. The reaction was heated at 70° C. for 3 h then cooled to room temperature. Water (100 mL) was added and the suspension was extracted with 1:1 ethyl acetate:methyl tert-butyl ether (3×, 50 mL). The organic layers were dried over sodium sulfate, and the solvent was removed in vacuo. The residue was suspended in methyl tert-butyl ether (20 mL) and stirred at 40° C. for 1 h. The suspension was filtered and the solid dried to give 4.93 g (82% yield) of ethyl 1-(1-(tert-butoxycarbonyl)piperidin-3-yl)-6-iodo-4-oxo-1,4-dihydroquinoline-3-carboxylate as a yellowish powder.

Provenance & Evidence