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A one-pot conversion of allyl alcohols into selenochroman derivatives was achieved by treatment with a phenyl trimethylsilyl selenide (TMSSePh)-AlBr 3 reagent system.

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2000organo-selenium compounds, nonmetal heterocycles organo-selenium compounds, nonmetal heterocycles S 0137 -173Conversion of Allyl Aryl Selenides into Selenochroman Derivatives.-Aryl selenides of type (I) cyclize in the presence of aluminum bromide to give selenochromans (II) in good yields.