New 2- and 3-methoxyquinopimaric-acid derivatives were synthesized by a Diels–Alder reaction of levopimaric acid and 2-methoxy-1,4-benzoquinone. The reaction rate and regioselectivity of the cycloaddition were increased significantly by using a Bmim·BF4 catalyst. Photolysis of 3-methoxyquinopimaric acid produced new scaffold derivatives. The compounds were characterized by NMR spectroscopy and elemental analysis.
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Translated from Khimiya Prirodnykh Soedinenii, No. 1, January–February, 2018, pp. 78–80.
F. Z. Galin is Deceased
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Vafina, G.F., Poptsov, A.I., Spirikhin, L.V. et al. Synthesis of New Methoxyquinopimaric-Acid Scaffold Derivatives. Chem Nat Compd 54, 88–91 (2018). https://doi.org/10.1007/s10600-018-2266-6
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DOI: https://doi.org/10.1007/s10600-018-2266-6