DDQ-MEDIATED TANDEM SYNTHESIS OF FUNCTIONALIZED PYRANOCOUMARINS FROM 4-HYDROXYCOUMARINS AND 1,3-DIARYLALLYLIC COMPOUNDS

[摘要]：A simple and efficient DDQ-mediated oxidative cross-coupling between 4-hydroxycoumarin and 1,3-diarylallylic compounds was developed. The reaction furnished functionalized pyranocoumarins in a single step without using any metal catalyst. The tandem process involves an intermolecular C C bond formation and an intramolecular C-O bond formation through double oxidative C H activation.

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