Abstract
A novel and expedient method for transformation of readily available 1-isochromanones bearing a diaryl allenic moiety at the C4-position to functionalized 5 H-dibenzo[ c, g]chromen-5-ones under mild conditions is developed. This strategy is based on the dual abilities of iron(III) chloride to promote selective C-O bond cleavage/6π electrocyclization and an oxidative aromatization sequence.
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