反应详情

To a solution of N-{3-[(2-methoxy-3,4-dioxocyclobut-1-en-1-yl)amino]phenyl}-3-[(pyridin-4-ylmethyl)amino]thiophene-2-carboxamide (EXAMPLE 1) (50 mg, 0.01 mmol) in DMSO (150 μL) was added a 2M solution of ammonia in methanol (650 μL). The reaction was left for 6 h at rt. The reaction was then purified by reverse phase HPLC using a gradient of 5→65% MeCN/H2O over 15 min at 15 mL/min. Removal of the solvent provided EXAMPLE 3 as a white solid. MS (ES): m/z 469.9 [MH+]. 1H NMR (DMSO-d6, 400 MHz): δ=5.06 (d, J=6.0 Hz, 2H), 6.82 (d, J=5.6 Hz, 1H), 7.18 (d, J=8.0 Hz, 1H), 7.25 (t, J=8.4 Hz, 1H), 7.37 (d, J=7.6 Hz, 1H), 7.39 (d, J=4.4 Hz, 1H), 7.61 (d, J=5.2 Hz, 1H), 7.64-7.68 (m, 2H), 7.78 (t, J=7.2 Hz, 1H), 8.02-8.06 (m, 2H), 8.21 (d, J=8.4 Hz, 1H), 8.83 (d, J=4.4 Hz, 1H), 9.48 (s, 1H), 9.78 (s, 1H).

1. customThe reaction was then purified by reverse phase HPLC
2. customover 15 min
3. customRemoval of the solvent