反应详情

温度

120 °C

8-bromo-3-(morpholin-4-ylcarbonyl)-1-phenyl-1,4-dihydrothiochromeno[4,3-c]pyrazole 5,5-dioxide (160 mg, 0.32 mmol) is dissolved in 1,4-Dioxane:water (4:2) to which is added methyltrifluoroborate potassium salt (80 mg, 0.65 mmol) and K2CO3 (90 mg, 0.65 mmol). The reaction mixture is degassed for 5 min and is added S-phos (6.5 mg, 0.016 mmol) followed by palladium acetate (3.6 mg, 0.016 mmol). The reaction mixture is heated under microwave for 2 h at 120° C. After this time, the reaction mass is concentrated and purified by silica gel flash chromatography to afford the title compound as an off white solid. 1H NMR (DMSO-d6, 400 MHz): δ 7.90-7.88 (d, J=8.0 Hz, 1H), 7.64-7.62 (m, 3H), 7.54-7.52 (m, 2H), 7.43-6.55 (d, J=7.5 Hz, 1H), 6.55 (s, 1H), 4.85 (s, 2H), 3.94 (m, 2H), 3.66 (m, 4H), 3.62 (m, 2H), 2.11 (s, 3H). MS (ESI+): 424.0. HPLC (max plot) 91.94%; Rt 4.17 min.

1. customThe reaction mixture is degassed for 5 min
2. concentrationAfter this time, the reaction mass is concentrated
3. custompurified by silica gel flash chromatography