反应详情

Sodium hydride (21 mg, 0.53 mmol, 60% in mineral oil) was added to the title compound of step 2 (100 mg, 0.44 mmol) in DMF (10 mL) at 0° C. After stirring 0.5 h, MeI (126 mg, 0.88 mmol) was added and stirring continued at 0° C. for 2 h. Following extractive work up with EA, the title compound (80 mg, yield: 75.3%) was obtained as a yellow solid. 1H NMR: (DMSO-d6, 400 MHz) δ: 9.47 (s, 1H), 9.46 (s, 1H), 8.53 (s, 1H), 3.54 (s, 3H). LCMS: 240.0, 242.0 (M+H)+.

1. stirringstirring
2. waitcontinued at 0° C. for 2 h