Trifluoroacetic acid → N-cyclopropyl-2-(3-((2-(2-fluorophenyl)-4-((methylamino)methyl)-1H-pyrrol-1-yl)sulfonyl)phenoxy)acetamide

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Reaction Steps

tert-Butyl ((1-((3-(2-(cyclopropylamino)-2-oxoethoxy)phenyl)sulfonyl)-5-(2-fluorophenyl)-1H-pyrrol-3-yl)methyl)(methyl)carbamate 3a (122 mg, 0.22 mmol) was dissolved in 8 mL of dichloromethane. The reaction solution was cooled in an ice bath, and 2 mL of trifluoroacetic acid were dropwise added. After removing the ice bath, the reaction solution was stirred at room temperature for 2 h. 20 mL of saturated sodium bicarbonate solution were added, and the reaction solution was extracted with dichloromethane (20 mL×3). The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with elution system A to obtain the title product N-cyclopropyl-2-(3-((2-(2-fluorophenyl)-4-((methylamino)methyl)-1H-pyrrol-1-yl)sulfonyl)phenoxy)acetamide 3 (80 mg, a colorless oil) in 80% yield.

Provenance & Evidence