Reaction of 1,2,5-thiadiazolo[3,4-d]pyrimidine-5,7-dione 2-oxide with water

Abstract

The products of the reaction of 1,2,5-thiadiazolo[3,4-d]pyrimidine-5,7-dione 2-oxide with water, viz. 1,2,5-thiadiazolo[3,4-d]pyrimidine-5,7-dione 2-oxide dihydrate and 6-amino2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-sulfamic acid, were isolated and characterized by X-ray diffraction.

Sulfamic Acid and Its N- and O-Substituted Derivatives

“…Several other heterocyclic sulfamate structures have been determined. − The 6-amino-2,4-dioxo 1,2,3,4-tetrahydropyrimidine-5-sulfamic acid, 6 , (7-amino-2,3-dihydro-5-oxo-5 H -thiazolo[3,2- a ]pyrimidin-6-yl)sulfamate, 7 , , and the related (8-amino-3,4-dihydro-2 H ,6 H -pyrimido[2,1- b ][1,3]-thiazin-6-on-7-yl)sulfamic acid …”