Triethylsilane → HCID 89963386, compound

Participants

Reaction Steps

To a solution of the 4-{[(1S*,2R*)-5,5-difluoro-2-{1-[(2-methoxyethoxy)methyl]-1H-pyrazol-5-yl}cyclohexyl]oxy}-N-(2,4-dimethoxybenzyl)-2-fluoro-5-methyl-N-(pyrimidin-4-yl)benzenesulfonamide (265 mg, 0.376 mmol) prepared in Example 155h and triethylsilane (0.50 mL) in dichloroethane (5.0 mL), trifluoroacetic acid (5.0 mL) was added at room temperature, and the reaction solution was stirred for 4 hours. The reaction solution was concentrated, then methanol (15 mL) and 6 M hydrochloric acid (5.0 mL) were added to the residue, and the reaction solution was stirred for 5 hours under heated reflux. To the reaction solution, an aqueous sodium hydrogencarbonate solution (50 mL) was added, followed by extraction five times with a dichloromethane/methanol (10:1) mixed solvent (50 mL). The thus obtained organic layer was dried over anhydrous sodium sulfate. After vacuum concentration, the residue was purified with silica gel chromatography (dichloromethane/methanol=10:1) to yield the title compound (125 mg, 71%) as a colorless solid.

Provenance & Evidence