Hydrochloric Acid → 2-acetamido-5-(N,N-dimethylaminosulfonyl)-1,3,4-thiadiazole

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A 40% aqueous solution of dimethylamine (400 ml) was charged into a glass reaction vessel fitted with a mechanical stirrer and thermometer. The solution was cooled to 20° C. and stirred while 2-acetamido-5-chlorosulfonyl-1,3,4-thiadiazole (250 grams) was slowly added. Ther temperature of the reaction mixture was kept between 0° and 20° C. during this addition. Stirring was then continued at room temperature for a period of about 2 hours. The reaction mixture was then treated with 6N hydrochloric acid. Solids were filtered out, water washed and air dried to yield the desired product 2-acetamido-5-(N,N-dimethylaminosulfonyl)-1,3,4-thiadiazole.

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