Acetic Anhydride → HCID 74084145, compound

Participants

Reaction Conditions

Reaction Steps

52 g of 2,5-dimethyl-benzothiazole hydrobromide and 48 g of potassium 3-hydroxy-1-propensulphonate were heated to 140° C. for 1 hour. 90 ml of acetic anhydride and 32 ml of triethylamine were added to the resulting melt of the quaternary salt and the mixture was stirred at 100° C. for 1 hour. The acetic acid formed in the reaction was then distilled off and the residue was taken up with water. Hydrochloric acid was added, whereupon the intermediate product crystallized.

Provenance & Evidence