Reaction of sulfamide with a variety of p-diketones gave (2H)-l, 2, 6-thiadiazine 1, l-dioxides (1'). The use of N-monosubstituted sulfamides gave 2-substituted 1, 2, 6-thiadiazine 1, l- dioxides (VI). The use of ethyl acylpyruvates as the o-diketones led to the 3-carbethoxy derivatives (VII), which reacted readily with amines to give amides and with hydrazine to give a hydrazide. The use of 2-acylcyclohexanones in the reaction with sulfamide gave 5, ...
![2-[(5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)sulfanyl]-N-(2-phenylethyl)acetamide结构式](https://image.chemsrc.com/caspic/469/5814-32-4.png)
