ISOTHIAZOLES .2. REACTION OF LAMINO-4-(4-METHOXYPHENYL)-ISOTHIAZOLE-1,1-DIOXIDE WITH SODIUM-AZIDE

lamino-4-(4-methoxyphenyl)-isothiazole-1,1-dioxide 1, was reacted with the azide ion in different solvents. Depending on reaction conditions -1H-isothiazole-[4,5-d]-1,2,3-triazole-6,6-dioxide 3 and/or hydro-3a- (4-methoxyphenyl)-1H-isothiazole-[4,5-d]- 1,2,3- triazole-6,6-dioxide 4 were formed. When ethanol or acetone were used as reaction solvent t he formation of the above compounds was accompanied by solvent additio n forming (4-methoxyphenyl)-5-ethoxy-isothiazole-1,1-dioxide 2 and oxy phenyl)-5-(2-oxopropyl)-isothiazole-1,1-dioxide 6, respectively. React ion mechanisms and structures of products are discussed.