Neoflavonoids or 4-arylcoumarins are prepared by arylation of 3-hydroxycoumarins with aryl-lead triacetates followed by palladium-catalysed reduction of the derived 3-trifluoromethylsulphonyl-oxyarylcoumarins.
D. M. X. Donnelly, J. Finet, P. J. Guiry and R. M. Hutchinson, J. Chem. Soc., Perkin Trans. 1, 1990, 2851 DOI: 10.1039/P19900002851
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