An efficient and environmentally benign synthesis of 3-organoselenylchromenones was accomplished via ironA C H T U N G T R E N N U N G (III) chloride/diorganyl diselenidespromoted intramolecular 6-endo-dig cyclization of alkynyl aryl ketone derivatives. The cyclization reactions proceeded cleanly under mild reaction conditions, and the desired chromenone derivatives were smoothly isolated in good yields. The methodology proved to be highly regioselective, giving only the six-membered regioisomers and was carried out using ironA C H T U N G T R E N N U N G (III) chloride/diorganyl diselenide at room temperature and under ambient atmosphere, which could be considered an economic and eco-friendly protocol.
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