Reactions with 1,8-naphthosultam. Synthesis of [1,2]benzisothiazolo[2,3,4-cde]benzotriazole 4,4-dioxide. A new ring system |
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| Authors: | Hamdy A. Hammouda Ahmed M. El-Reedy Mohie A. F. Sharaf A. M. Abdel-Fattah |
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| Affiliation: | Chemistry Department, Faculty of Science, Cairo University, Giza, A. R. Egypt |
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| Abstract: | 1,8-Naphthosultam (I) coupled with arenediazonium salts to give the 4-arylazo- VII, and the 2,4-bisarylazo-1,8-naphthosultams, VIa-c. On the other hand, coupling of the 4-substituted 1,8-naphthosultams afforded the 2-phenylazo derivatives, IIa,b. Reduction of IIa,b gave the 2-amino compounds IVa,b, which reacted with nitrous acid to give the [1,2]benzisothiazolo[2,3,4-cde]benzotriazoles, Va,b, establishing thus a new ring system. The nitro analogue Vc was also synthesized. |
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