Abstract
AbstractCopper‐catalyzed cross‐coupling reactions of α‐bromoaryl NH‐sulfoximines with elemental sulfur lead to benzo[d][1,3,2]dithiazole‐1‐oxides, which represent a new class of three‐dimensional heterocycles. The reactions proceed under mild conditions showing good functional group and heterocycle tolerance. By imination/oxidation, the initial cross‐coupling products can be converted to unprecedented cyclic sulfonimidamides derivatives. Furthermore, a seven‐membered heterocycle was obtained by a ruthenium‐catalyzed ring‐expansion with ethyl propiolate.magnified image
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