Hydrochloric Acid → (Z)-2-[(1H-indol-3-yl)methylene]-5-chloro-6-hydroxy-7-(piperazin-1-ylmethyl)benzofuran-3(2H)-one dihydrochloride

Participants

Reaction Steps

A solution of tert-butyl (Z)-4-({2-[(1H-indol-3-yl)methylene]-5-chloro-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate (0.016 g, 0.031 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 1 hour. The mixture was azeotroped twice with toluene under reduced pressure, and then the residual solid was suspended in methylene chloride and thereby washed to obtain (Z)-2-[(1H-indol-3-yl)methylene]-5-chloro-6-hydroxy-7-(piperazin-1-ylmethyl)benzofuran-3(2H)-one dihydrochloride (0.011 g, 73%).

Provenance & Evidence