Hydrochloric Acid → 3-(2-Amino-3-methylthiocarbamoyloxypropoxy)-5-chloro-1,2-benzoisoxazole hydrochloride

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Reaction Steps

To a solution of 0.4 g of 5-chloro-3-(2-tert-butoxycarbonylamino-3-methylthiocarbamoyloxypropoxy)-1,2-benzoisoxazole in 10 ml of methanol is added 5 ml of a dioxane solution (3.2N) of hydrogen chloride at room temperature, and they are subjected to reaction at the same temperature for three hours, after which the solvent is removed by distillation under reduced pressure. To the residue obtained is added 3 ml of 2-propanol, and the crystals precipitated are collected by filtration, to obtain 0.22 g of pale yellow, crystalline 3-(2-amino-3-methylthiocarbamoyloxypropoxy)-5-chloro-1,2-benzoisoxazole hydrochloride having a melting point of 198.8°-199.2° C. (decomp.).

Provenance & Evidence