Trifluoroacetic acid → HCID 58452643, compound

Participants

Reaction Conditions

Reaction Steps

Trifluoroacetic acid (1 mL) was added to a solution of 6-{(E)-1-(4-tert-butylphenyl)-2-[(2R)-1-(2,4-dimethoxybenzyl)-5-oxopyrrolidin-2-yl]ethenyl}-2-methoxypyridine-3-carbonitrile (32 mg) in anisole (1 mL), and the mixture was stirred at 85° C. overnight. The solvent was evaporated under reduced pressure, and then the residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1→1:5). The resulting compound was dissolved in 1,4-dioxane (1 mL) and 48% hydrobromic acid (1 mL) was added, after which the mixture was stirred at 65° C. for one hour. Saturated aqueous sodium bicarbonate was added to the reaction solution, followed by extraction with ethyl acetate. The organic layer was washed with brine and dried over anhydrous magnesium sulfate, after which the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:5→chloroform:methanol=5:1) to give the title compound (8 mg, 36%) as a colorless solid.

Provenance & Evidence