In the above process of riilg closure, the hydrazo compound acts obviously in the dithiol form, as otherwise the formation of the thiodiazole compound is inexplicable. The di-acetyl compound loses its acetyl groups when hydrolyzed by boiling with hydrochloric acid, and the unsubstituted di-imino-tetrahydro-thiodiazole is generated. This method of ring closure is of special significance from the point of view of its applicability with all alkyl and aryl ...
![N-[5-[acetyl(methyl)amino]-1,3,4-thiadiazol-2-yl]-N-methylacetamide结构式](https://image.chemsrc.com/caspic/156/61784-94-9.png)