Hydrochloric Acid → HCID 60155622, compound

Participants

Reaction Steps

A solution of tert-butyl (Z)-4-({2-[(1H-indol-3-yl)methylene]-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate (0.025 g, 0.053 mmol) in methylene chloride (2.0 mL) was added with a 4 M solution of hydrogen chloride in 1,4-dioxane (2.0 mL), and then the mixture was stirred at room temperature for 2 hours. The solvent was evaporated under reduced pressure, and then the residue was added with triethylamine and thereby made basic. Then, the mixture was azeotroped with toluene, and then the residue was subjected to silica gel column chromatography (aminopropyl silica was used, eluted with chloroform/methanol (90:10)) to obtain (Z)-2-[(1H-indol-3-yl)methylene]-6-hydroxy-7-(piperazin-1-ylmethyl)benzofuran-3(2H)-one (0.012 g, 60%).

Provenance & Evidence