<i>N</i>-(Phenylsulfonyl)- and<i>N</i>-Methyl-<i>N</i>-(phenylsulfonyl)benzohydrazonoyl Azides. Thermally Induced Cyclization to Tetrazoles and Decomposition to Benzonitriles
作者:Suketaka Ito、Yumo Tanaka、Akikazu Kakehi
DOI:10.1246/bcsj.57.539
日期:1984.2
N-(Phenylsulfonyl)- and N-methyl-N-(phenylsulfonyl)benzohydrazonoyl azides, prepared from the corresponding hydrazonoyl chlorides and sodium azide, undergo the cyclization to 5-phenyl-1-(phenylsulfonylamino)-1H-tetrazoles together with the competitive decomposition to benzonitriles and the Curtius-type rearrangement leading to semicarbazides when heated in benzene under reflux. The tetrazole formation of hydrazonoyl azides may be characteristic of such hydrazonoyl azides as those carrying an N-sulfonyl substituent, the strong electron-withdrawing nature of which probably promotes the cyclization.