Piperazine → HCID 10269950, compound

Participants

Reaction Steps

Prepared from 2,3-dimethoxy-6-methyl-7-nitro-quinoxaline-5-carbonyl chloride (13) 250 mg (0.80 mmol) and piperazine 138 mg (1.60 mmol). Reaction was continued for 2 hours, and the crude product was eluted through a flash column (8% methanol in chloroform): 250 mg (86%), mp 150-152° C.; 1H NMR (CDCl3): δ 8.30 (s, 1H), 4.05 (s, 3H), 3.96 (s, 3H), 3.81 (t, 4H, J=4.9, 5.1 Hz), 2.96 (t, 4H, J=5.1, 4.9 Hz), 2.54 (s, 3H), 1.84 (br s, 1H); MS (APCI): m/z 362 (M+H). Anal. Calcd. for C16H19N5O5: C, 53.18; H, 5.30; N, 19.38. Found: C, 53.08; H, 5.22; N, 18.82.

Provenance & Evidence