Abstract

Starting from NH-sulfonimidamides, rhodium-catalyzed C-H bond alkenylation followed by aza-Michael cyclization leads to unprecedented benzoisothiazole 1-oxides. The applicability and robustness of the method is demonstrated in 25 examples with yields up to 95 %. The resulting scaffolds are partly saturated, 3D heterocycles with potential significance for medicinal and agricultural chemistry.

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