Hydrochloric Acid → HCID 86612531, compound

Participants

Reaction Steps

A 0.76M solution of isopropyl magnesium bromide in THF (8.5 ml) was added dropwise to a solution of tert-butyl {4-[3-{[methoxy(methyl)amino]carbonyl}-1-(4-methoxy-phenyl)-1-H-pyrazol-5-yl]benzyl}carbamate (1 g) in THF (10 ml) at 10–15° C. The mixture was stirred at ambient temperature for 4 hours. The reaction mixture was poured into a mixture of 1M HCl and ice. The mixture was extracted with AcOEt. The organic layer was washed with saturated aqueous sodium bicarbonate solution and saturated aqueous sodium chloride solution, dried over magnesium sulfate, and concentrated in vacuo. The residue was purified by silica gel column chromatography eluted with AcOEt/n-hexane=20%, 25%, then 10% MeOH/CHCl3. The combined pure fraction was concentrated in vacuo to give tert-butyl {4-[3-isobutyryl-1-(4-methoxyphenyl)-1H-pyrazol-5-yl]benzyl}carbamate (318 mg) as an amorphous powder.

Provenance & Evidence