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An innovative route for intramolecular cyclization of alkenols has been delineated through a ring closing reaction of suitably alkenols functionalized cyclic ethers tetrahydropyran or tetrahydrofuran type by reaction with phenylselenyl halides, in good yield. Proper choice of some Δ 4 - and Δ 5 -alkenols and pyridine as catalyst enables fast and facile cyclization. Catalytic amount...
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