The potential of pyrones as precursors to 3-acyltetramic acids is demonstrated by the conversion of 5-ethoxycarbonyl-4-methoxy-6-methyl-2-pyrone into a 3-acyltetramic acid.
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For leading references, see: (a) JonesR. C. F., BegleyM. J., PetersonG. E., and SumariaS., J. Chem. Soc., Perkin Trans. 1, 1990, 1959; (b) B. J. L. Royles, Chem Rev., 1995, 95, 1981.
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See also: (a) JonesR. C. F., BhalayG., CarterP. A., DullerK. A. M., and VultoS. I. E., Synlett, 1995, 149; (b) R. C. F. Jones, G. Bhalay, P. A. Carter, K. A. M. Duller and S. I. E. Vulto, J. Chem. Soc., Perkin Trans. 1, 1994, 2513.
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