Benzyl Chloride → 1,3,4-Thiadiazol-2-amine, 5-((phenylmethyl)thio)-

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In a mixture of 40 ml of water and 45 ml of ethanol, 21.1 g of 2-amino-5-mercapto-1,3,4-thiadiazole and 6.9 g of sodium hydroxide were dissolved. To this solution, 19.6 g of benzyl chloride was added, and the mixture was stirred at 50° C. for 1 hour. After cooling, water was added to the reaction mixture, the formed precipitate was separated by filtration and washed with water and an ethanol/n-hexane (1:1) mixture respectively. The thus treated precipitate was dried under reduced pressure, and thus 32.5 g of 2-amino-5-benzylthio-1,3,4-thiadiazole was obtained. m.p. 159°-161° C. Yield 94%.

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