反应详情

温度

80 °C

To a solution of 1-(7-bromo-5-iodobenzothiazol-2-yl)-3-ethylurea (0.55 g, 1.29 mmol) and ethyl 4-allyl-1-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidin-2-yl)piperidine-4-carboxylate (0.79 g, 1.97 mmol) in 1,4-dioxane:MeOH (30:20 mL) was added potassium phosphate (0.41 g, 1.97 mmol) at rt and the mixture degassed for 15-20 min by purging N2 followed by addition of tetrakis(triphenylphosphine)palladium(0) (0.15 g, 0.13 mmol). The reaction mixture was again degassed for another 15-20 min then heated up to 80° C. for 5 h. After completion of reaction (by TLC), the reaction mixture was cooled to rt, diluted with EtOAc (500 mL) and passed through celite. The filtrate was evaporated and the crude residue was purified over 100-200 M silica-gel using 1.50% MeOH: DCM to obtain the desired product as a beige solid (0.20 g, 27% yield). 1H NMR (DMSO-d6): δ 1.09 (t, J=7.20 Hz, 3H), 1.21 (t, J=6.80 Hz, 3H), 1.47 (m, 2H), 2.05 (m, 2H), 2.29 (m, 2H), 3.18 (m, 2H), 3.21 (q, J=7.20, 2H), 4.17 (q, J=6.80 Hz, 2H), 4.46 (m, 2H), 5.05 (m, 2H), 5.72 (m, 1H) 6.74 (br s, 1H), 7.69 (s, 1H), 7.87 (s, 1H); 8.77 (s, 2H) and 10.90 (br s, 1H).

1. customthe mixture degassed for 15-20 min
2. customby purging N2
3. customThe reaction mixture was again degassed for another 15-20 min
4. customAfter completion of reaction (by TLC)
5. temperaturethe reaction mixture was cooled to rt
6. customThe filtrate was evaporated
7. customthe crude residue was purified over 100-200 M silica-gel