p-Toluenesulfonic acid → 3-Methyl-s-triazolo(3,4-b)benzothiazole p-toluenesulfonate

Participants

Reaction Conditions

Reaction Steps

3-Methyl-s-triazolo(3,4-b)benzothiazole (2 grams) was dissolved in 50 milliliters of ethanol. To this solution, 2 grams of p-toluenesulfonic acid were added, with stirring. After thorough mixing, the reaction mixture was heated to 90° C. and maintained at 90° C. for 1 hour. Solvent was thereafter removed under reduced pressure, yielding the desired salt as a solid. It was recrystallized from ethanol, m.p., 163°-4° C. NMR confirmed its identity. After a second recrystallization from ethanol, elemental analysis showed the following:

Provenance & Evidence