反应详情

温度

120 °C

To a solution of 4-chloro-3,5-dimethyl-1H-pyrazole (step 5a)(37 mg, 0.283 mmol) in dry acetonitrile (4.5 mL) at room temp is added sodium hydride (14 mg of a 60% dispersion in mineral oil, 0.353 mmol). The mixture is stirred at room temp for 10 minutes before trans-methanesulfonic acid 4-[(5-chloro-2-methyl-pyridine-3-carbonyl)-amino]-cyclohexylmethyl ester (step 4) (85 mg, 0.236 mmol) is added in one portion. The mixture is heated at 120° C. for 30 minutes using microwave radiation. After cooling to RT, the reaction mixture is diluted with water (10 mL) and extracted with EtOAc (3×10 mL). The EtOAc extracts are combined, washed with saturated brine (10 mL), dried (MgSO4), filtered and evaporated to give a colourless foam. Purification by chromatography on silica gel using a 12 g pre-packed column eluting with 0-100% EtOAc affords the title compound as a colourless solid. MS m/z 395.3/397.3 [M+H]+. 1H NMR (400 MHz, DMSO-d6) δ 8.53 (1H, d), 8.39 (1H, d), 7.78 (1H, d), 3.83 (2H, d), 3.67 (1H, m), 2.47 (3H, s), 2.20 (3H, s), 2.09 (3H, s), 1.89 (2H, m), 1.73 (1H, m), 1.57 (2H, m), 1.16 (4H, m).

1. additionis added in one portion
2. temperatureAfter cooling to RT
3. extractionextracted with EtOAc (3×10 mL)
4. washwashed with saturated brine (10 mL)
5. dry with materialdried (MgSO4)
6. filtrationfiltered
7. customevaporated
8. customto give a colourless foam
9. customPurification by chromatography on silica gel using a 12 g pre-packed column
10. washeluting with 0-100% EtOAc