反应详情

To a solution of 3-(3,4-dimethoxyphenyl)-1H-indazole-5-carbonitrile (200 mg, 0.72 mmol) in ethanol (3.5 mL) was added 6 N NaOH (0.5 mL) followed by H2O2 (2.0 mL of a 30% solution). The solution was heated to 45° C. for 1 hour when water (80 mL) was added and the pH adjusted to <1 with 3 N HCl. The reaction was then filtered and the product dried to give the title compound (180 mg, 61 mmol, 84% yield). 1H NMR (DMSO-d6) δ 13.3 (s, 1H), 8.59 (s, 1H), 8.12 (br s, 1H), 7.92 (d, 1H), 7.6–7.5 (m, 2H), 7.52 (s, 1H), 7.3 (br s, 1H), 7.13 (d, 1H), 3.87 (s, 3H), 3.84 (s, 3H); ES-MS (m/z) 298 [M+1]+.

1. additionwas added
2. filtrationThe reaction was then filtered
3. customthe product dried