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note
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To directly obtain 5-methoxybenzofuran as the major product, use of MeOH as the sole solvent resulted in a complex mixture.
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61
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2. The structure of 9f′ was confirmed by X-ray crystallographic analysis. CCDC 739253 contains the supplementary crystallographic data for compound 9f′. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via
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Spectral data of synthetic sample are in good agreement with those of natural corsifuran C. See
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