Triethylamine → HCID 18415562, compound

Participants

Reaction Steps

To an ice-cooled solution of 1-Benzyloxy-7-carboxyquinoxaline-2,3(1H,4H)-dione (422 mg, 1.35 mmol) in 10 ml of N,N-dimethylformamide was added 1-hydroxybenzotriazole (218 mg, 1.48 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (272 mg, 1.42 mmol). Stirring was continued for 30 min at 0° C. and O-benzylhydroxylamine hydrochloride (237 mg, 1.49 mmol) and dry triethylamine (0.21 ml, 1.5 mmol) was added. The mixture was stirred overnight at room temperature, then cooled and filtered. The isolated solid was successively washed with water, saturated aqueous sodium hydrogen carbonate and water. Recrystallisation from ethanol gave 290 mg (51%) of the title compound. 1H-NMR (DMSO-d6): 4.95 (s, 2H, CH2), 5.19 (s, 2H, CH2), 7.2-7.8 (m, 13H, ArH), 11.8 (br.s, 1H, exchangeable), 12.3 (br.s, 1H, exchangeable).

Provenance & Evidence