Hydrogen Bromide → HCID 58452585, compound

Participants

Reaction Conditions

Reaction Steps

48% hydrobromic acid (1.5 mL) was added to a solution of (5R)-5-{(E)-2-(4-tert-butylphenyl)-2-[6-methoxy-5-(methylsulfanyl)pyridin-2-yl]ethenyl}-1-(2,4-dimethoxybenzyl)pyrrolidin-2-one (53 mg) in 1,4-dioxane (2 mL), and the mixture was stirred at 65° C. for 30 minutes. Water 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. A solution of the residue in trifluoroacetic acid (4 mL) and anisole (2 mL) was stirred at 80° C. for six hours. The solvent was evaporated from the reaction solution under reduced pressure. The residue was purified by silica gel column chromatography (chloroform:methanol=100:1→3:1) and preparative HPLC (Waters Sunfire 19×150 mm 5 μm, rate: 20 mL/min, eluent: A=acetonitrile, B=0.1% trifluoroacetic acid solution, gradient: 10 to 90%) and powdered with ethyl acetate-hexane to give the title compound as a colorless powder (10 mg, 27%).

Provenance & Evidence