反应详情

To a solution of 2-methylamino-5-benzylthio-1,3,4-thiadiazole (4.0 g) in ethyl acetate (100 ml) was added 1.5 g of methyl isocyanate. The reaction was stirred at room temperature for 2 hrs then heated at reflux for an additional 2 hrs. The product, 1,3-dimethyl-3-(5-benzylthio-1,3,4-thiadiazol-2-yl)urea, crystallized upon the addition of petroleum ether, was collected, washed with ether and dried to give 4.7 g, MP 139°-142° C.

1. temperaturethen heated
2. temperatureat reflux for an additional 2 hrs
3. customThe product, 1,3-dimethyl-3-(5-benzylthio-1,3,4-thiadiazol-2-yl)urea, crystallized upon the addition of petroleum ether
4. customwas collected
5. washwashed with ether
6. customdried
7. customto give 4.7 g, MP 139°-142° C.