反应详情

温度

70 °C

A mixture of 4-bromo-7-chloro-2-(2,6-dichlorophenyl)-2H-pyrazolo[4,3-c]pyridine (400 mg, 1.06 mmol), tert-butyl carbamate (619 mg, 5.3 mmol), Pd2(dba)3 (48 mg, 0.05 mmol), Xantphos (61 mg, 0.1 mmol) and potassium phosphate tribasic (449 mg, 2.1 mmol) in toluene (10 mL) and water (2.0 mL) was purged with argon and heated at 70° C. for 3 hours. The reaction mixture was filtered through Celite® and washed with ethyl acetate. The filtrate was washed with water and brine, dried over sodium sulphate, and concentrated under reduced pressure. The residue was purified by silica gel flash chromatography (0-50% ethyl acetate in cyclohexane) to afford the title compound as a yellow solid (531 mg, contaminated with residual tert-butyl carbamate). LCMS (Method D): RT=3.76 min, m/z: 413 [M+H+].

1. customwas purged with argon
2. filtrationThe reaction mixture was filtered through Celite®
3. washwashed with ethyl acetate
4. washThe filtrate was washed with water and brine
5. dry with materialdried over sodium sulphate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel flash chromatography (0-50% ethyl acetate in cyclohexane)