反应详情

Oxalyl chloride (2.0M in DCM, 0.52 mL, 1.03 mmol) was added to a solution of 1-((1S,3R,4S)-4-(ethoxycarbonyl)-3-methylcyclohexyl)-5-(trifluoromethyl)-1H-pyrazole-4-carboxylic acid (239 mg, 0.687 mmol) in DCM (2.0 mL) followed by 1 drop of DMF while cooling in an ice bath. The solution was removed from the ice bath and allowed to stir at room temperature for 1 h. The reaction mixture was concentrated to dryness under reduced pressure (rotary evaporator) and the crude residue was treated with DCM (2.0 mL) and cooled to 0° C. The stirring solution was then treated with N-(2-(3,5-dichloro-2-methoxypyridin-4-yl)ethyl)-2,2-dimethylpropan-1-amine (200 mg, 0.687 mmol) in DCM (2 mL) followed by the addition of DIPEA (0.36 mL, 2.06 mmol) and allowed to warm to room temperature and stirred overnight (16 h). The reaction mixture was concentrated to dryness under reduced pressure (rotary evaporator) and the crude residue was purified on an ISCO Combiflash™ RF (25 g Grace Reveleris column, using a gradient of 0-50% EtOAc in heptane) affording (1S,2R,4S)-ethyl 4-(4-((2-(3,5-dichloro-2-methoxypyridin-4-yl)ethyl)(neopentyl)carbamoyl)-5-(trifluoromethyl)-1H-pyrazol-1-yl)-2-methylcyclohexanecarboxylate (350 mg, 0.56 mmol, 82% yield) as a white crystalline solid. MS (ESI) 621.2, 623.2 [M+H]+.

1. temperaturewhile cooling in an ice bath
2. customThe solution was removed from the ice bath
3. concentrationThe reaction mixture was concentrated to dryness under reduced pressure (rotary evaporator)
4. additionthe crude residue was treated with DCM (2.0 mL)
5. temperaturecooled to 0° C
6. temperatureto warm to room temperature
7. stirringstirred overnight (16 h)
8. concentrationThe reaction mixture was concentrated to dryness under reduced pressure (rotary evaporator)
9. customthe crude residue was purified on an ISCO Combiflash™ RF (25 g Grace Reveleris column