Cycloaddition reactions of 2-oxo-2H-cyclohepta[b]furan derivatives with arylacetylenes and the di-π-methane rearrangement of homobarrelene derivatives

2-Oxo-2H-cyclohepta[b]furan derivatives participate in [4 + 2]cycloaddition reactions with aryl acetylenes leading to homobarrelene derivatives and the latter undergo di-π-methane rearrangement resulting in complex carbocycles.

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