Sulfonic acid amides azides

Irradiation isopropanol Sulfonic acid amides from sulfonic acid azides... 

Unsaturated acids are converted to amines most satisfactorily by the Curtius reaction (sodium azide method). The Hofmann reaction is applicable with certainty only to a,/3-olefinic acid amides, since the olefin group in another position is likely to be halogenated by the reagent. The Schmidt reaction is applicable to all olefinic acids, although there is a possible danger of sulfonation at the site of unsaturation. 

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