反应详情

To a mixture of 5-aminomethyl-1,3,4-thiadiazole-2-thiol hydrochloride (5.5 g) in water (50 ml), dioxane (50 ml) and triethylamine (15 ml) was added t-butoxycarbonyl azide (5.6 g) and the mixture was stirred for 24 hours at 40° to 45° C. After the reaction was over, the dioxane was distilled off under reduced pressure. The residue was adjusted to pH2 with 10% hydrochloric acid and extracted twice with ethyl acetate. The extract was washed with a saturated aqueous solution of sodium chloride and then dried over magnesium sulfate and then evaporated to dryness to give 5-t-butoxycarbonylaminomethyl-1,3,4-thiadiazole-2-thiol (4.83 g). m.p. 144° to 146° C.

1. distillationwas distilled off under reduced pressure
2. extractionextracted twice with ethyl acetate
3. washThe extract was washed with a saturated aqueous solution of sodium chloride
4. dry with materialdried over magnesium sulfate
5. customevaporated to dryness