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

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Reaction Steps

A solution of tert-butyl (Z)-4-({2-[(6-amino-1H-indol-3-yl)methylene]-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate (0.023 g, 0.047 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 mixture was azeotroped twice with toluene under reduced pressure, and then the residual solid was suspended in a mixed solvent of methylene chloride and diethyl ether and thereby washed to obtain (Z)-2-[(6-amino-1H-indol-3-yl)methylene]-6-hydroxy-7-(piperazin-1-ylmethyl)benzofuran-3(2H)-one trihydrochloride (0.010 g, 43%).

Provenance & Evidence