A flexible synthetic route leading via indan-1-ones to variously methylated and oxygenated isocoumarins is described. The indanones are prepared by alternative routes involving intramolecular Friedel–Crafts cyclisation of aryl-propionic acids or pericyclic ring closure of acrylophenones. The influence of substitution on the rate of the pericyclic reaction is assessed.
R. H. Carter, M. J. Garson, R. A. Hill, J. Staunton and D. C. Sunter, J. Chem. Soc., Perkin Trans. 1, 1981, 471 DOI: 10.1039/P19810000471
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