Ethanol → 1,2-Benzisothiazol-4-ol, 7-amino-

Participants

Reaction Steps

This reduction is as a rule carried out under atmospheric pressure or in a closed vessel under superatmospheric pressure, with or without simultaneous heating. The reaction may be carried out in the presence of a diluent or solvent, for example, a lower alcohol, e.g. methanol, ethanol or preferably propanol, or in the acid required for the reduction, preferably in acetic acid, or in the acylating reaction medium of acetic acid and acetic anhydride, described above, in which 7-acetamino-4-acetoxy-1,2-benzisothiazole is obtained. 7-Acetamino-4-acetoxy-1,2-benzisothiazole can subsequently be deacylated in the above manner to give 7-amino-4-hydroxy-1,2-benzisothiazole.

Provenance & Evidence