2-Methylbenzothiazole → 2,3-Dimethyl-benzothiazolium p-toluenesulfonate
Reaction equation
[CH3:1][C:2]1[S:3][C:4]2[CH:10]=[CH:9][CH:8]=[CH:7][C:5]=2[N:6]=1.[C:11]1(C)[C:12]([S:17]([O:20]C)(=[O:19])=[O:18])=[CH:13][CH:14]=[CH:15][CH:16]=1>CC(C)=O>[CH3:1][C:2]1[S:3][C:4]2[CH:10]=[CH:9][CH:8]=[CH:7][C:5]=2[N+:6]=1[CH3:11].[CH3:1][C:15]1[CH:14]=[CH:13][C:12]([S:17]([OH:20])(=[O:18])=[O:19])=[CH:11][CH:16]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
2-Methylbenzothiazole (74.6 pbw) and methyl toluenesulfonate (93.1 pbw) are mixed with one another and heated with stirring. At about 120° C. an exothermic reaction starts, in which the temperature of the mixture rises to 180° C. The solution is kept at this temperature for 10 minutes and then cautiously poured into 1000 pbw of acetone. The suspension obtained is stirred for one hour. The precipitate is removed by filtration with suction and washed with acetone. The powder obtained is dried in vacuo over phosphorus pentoxide.