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3-(p-Nitrobenzolsulfonamido)-und 3-Sulfanilamidobenzisothiazol-1,1-dioxid

3-(p-Nitrobenzenesulfonamido)- and 3-sulfanilamidobenzoisoxazole-1.1-dioxide (new sulfonamides, XVI.)

Neue sulfonamide, 16. Mitt

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Zusammenfassung

Kupplung von 3-Chlorbenzisothiazol-1,1-dioxid mit p-Nitrobenzolsulfonamid Führt zum 3-(p-Nitrobenzolsulfonamido)-benzisothiazol-1,1-dioxid, und zwar entweder unter Einsatz des freien Sulfonamids in Chlorbenzol in Gegenwart von Kupferbronze oder unter Einsatz des Natriumsalzes inDMF oder Schmelze. Katalytische Reduktion der Nitrogruppe führt zu 3-Sulfanilamidobenzisothiazol-1,1-dioxid, das direkt durch Kupplungsreaktionen nicht darstellbar ist.

Abstract

3-(p-Nitrobenzenesulfonamido)-benzisothiazole-1,1-dioxide can be obtained from 3-chlorobenzisothiazole-1,1-dioxide by coupling with p-nitrobenzenesulfonamide in two ways: from the free sulfonamide in chlorobenzene solution in the presence of copper bronze, or from the sodium salt of the sulfonamide in dimethylformamide or in a melt. 3-sulfanilamidobenzisothiazole-1,1-dioxide, not directly available by coupling, was prepared by catalytic reduction of the nitro group.

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15. Mitt.:H. Bretschneider, W. Richter undW. Klötzer, Mh. Chem.96, 1661 (1965).

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Egg, H. 3-(p-Nitrobenzolsulfonamido)-und 3-Sulfanilamidobenzisothiazol-1,1-dioxid. Monatshefte für Chemie 100, 34–37 (1969). https://doi.org/10.1007/BF00938233

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  • DOI: https://doi.org/10.1007/BF00938233

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