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A novel approach for the cyclization of arylalkynes with selenium(IV) bromide prepared in situ has been elaborated. The use of an alkene additive as a bromine scavenger provides a convenient synthetic pathway for the synthesis of a wide variety of 3‐bromobenzo[b]selenophenes. Reactions can be performed open to air without the use of moisture‐sensitive reagents, anhydrous solvents, or an inert atmosphere...
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