Displacement of the amino group of 7-amino [1, 2, 5] thiadiazolo [3, 4-d] pyrimidine (I) by secondary amines was shown to occur with the formation of 7-(disubstituted amino)[1, 2, 5] thiadiazolo [3, 4-d] pyrimidines(V-VIII). Primary amines were likewise shown to effect displacement of the amino group, but cleavage of the pyrimidine ring to a 1, 2, 5-thiadiazole may ensue. The structure of the amino-group exchange product from I and butylamine ...
![[1,2,5]thiadiazolo[3,4-d]pyrimidin-7-amine结构式](https://image.chemsrc.com/caspic/385/2829-57-4.png)
![N-benzyl-8-thia-2,4,7,9-tetrazabicyclo[4.3.0]nona-2,4,6,9-tetraen-5-amine结构式](https://image.chemsrc.com/caspic/063/6944-99-6.png)
![[1,2,5]Thiadiazolo[3,4-d]pyrimidin-7-amine,N-butyl结构式](https://image.chemsrc.com/caspic/047/7403-20-5.png)
![[1,2,5]Thiadiazolo[3,4-d]pyrimidin-7-amine,N-ethyl结构式](https://image.chemsrc.com/caspic/003/89712-90-3.png)
![[1,2,5]Thiadiazolo[3,4-d]pyrimidine,7-(4-morpholinyl)结构式](https://image.chemsrc.com/caspic/083/6313-27-5.png)
![[1,2,5]Thiadiazolo[3,4-d]pyrimidine,7-(1-pyrrolidinyl)结构式](https://image.chemsrc.com/caspic/379/7596-96-5.png)
![N-cyclohexyl-8-thia-2,4,7,9-tetrazabicyclo[4.3.0]nona-2,4,6,9-tetraen-5-amine结构式](https://image.chemsrc.com/caspic/056/93787-16-7.png)
![[1,2,5]Thiadiazolo[3,4-d]pyrimidin-7-amine, N-phenyl结构式](https://image.chemsrc.com/caspic/060/6306-88-3.png)
![N,N-dimethyl-8-thia-2,4,7,9-tetrazabicyclo[4.3.0]nona-2,4,6,9-tetraen-5-amine结构式](https://image.chemsrc.com/caspic/136/6306-86-1.png)