Trifluoroacetic acid → HCID 86681972, compound

Participants

Reaction Steps

A solution of tert-butyl (Z)-4-[(2-{[1-(4-chlorophenylsulfonyl)-1H-indol-3-yl]methylene}-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl)methyl]piperazine-1-carboxylate (0.153 g, 0.235 mmol) in methylene chloride (6 mL) was added with trifluoroacetic acid (6 mL), and the mixture was stirred overnight at room temperature. The reaction mixture was concentrated, then a solution of the resulting residue in methanol (8 mL) was added with a 5% solution of hydrogen chloride in methanol (2 mL), and the mixture was stirred at room temperature for 2 hours. The solvent was evaporated, and the resulting solid was suspended in acetonitrile and thereby washed to obtain (Z)-2-{[1-(4-chlorophenylsulfonyl)-1H-indol-3-yl]methylene}-6-hydroxy-7-(piperazin-1-ylmethyl)benzofuran-3(2H)-one dihydrochloride (0.0878 g, 60%).

Provenance & Evidence