1,4-Dioxane hydrochloride → 5-(2,4-Dihydroxy-5-isopropylphenyl)-4-[4-(4-methylpiperazin-1-ylmethyl)phenyl]-2,4-dihydro-[1,2,4]triazol-3-one

Participants

Reaction Conditions

Reaction Steps

At room temperature, 4 N hydrochloric acid/1,4-dioxane solution (5 mL) was added to a methanol (5 mL) solution of 5-(5-isopropyl-2,4-bis-methoxymethoxyphenyl)-4-[4-(4-methyl piperazin-1-ylmethyl)phenyl]-2,4-dihydro-[1,2,4]triazol-3-one (F652-09, 644 mg, 1.26 mmol). After stirring at 40° C. for 1 hour, the solvent was distilled off under reduced pressure. Methanol was added to the crude product thus obtained, and the resulting suspension was stirred at room temperature. The precipitated solid was collected by filtration to obtain 5-(2,4-dihydroxy-5-isopropylphenyl)-4-[4-(4-methylpiperazin-1-ylmethyl)phenyl]-2,4-dihydro-[1,2,4]triazol-3-one (OH-a13) dihydrochloride (white solids).

Provenance & Evidence