Trifluoroacetic acid → HCID 86707270, compound

Participants

Reaction Steps

Trifluoroacetic acid (1 mL) was added to a solution of N-(2,4-dimethoxybenzyl)-N-{2-fluoro-4-[2-(pyridin-2-yl)ethoxy]phenyl}-2-(trifluoroacetyl)-1,2,3,4-tetrahydroisoquinoline-6-sulfonamide obtained (350 mg) in a mixture of anisole (5 mL) and chloroform (5 mL) while cooling in ice, and the mixture was stirred at room temperature for 16 hr. To the reaction mixture was added saturated aqueous sodium hydrogen carbonate solution while cooling in ice, and the mixture was extracted with ethyl acetate. The organic layer was washed with brine and dried over anhydrous magnesium sulfate and then the desiccant was filtered off, followed by concentration under reduced pressure. The resulting residue was purified by NH silica gel column chromatography (hexane:ethyl acetate=70:30→chloroform:methanol=95:5) to afford N-{2-fluoro-4-[2-(pyridin-2-yl)ethoxy]phenyl}-2-(trifluoroacetyl)-1,2,3,4-tetrahydroisoquinoline-6-sulfonamide as a colorless oil (12 mg).

Provenance & Evidence