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New coumarins ofHaplophyllum obtusifolium

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Abstract

Two coumarins have been isolated from an ethanolic extract of the epigeal part ofHaplophyllum obtusifolium Lebed.: capensin (I) and the new coumarin obtusicin, C5H16O6, (II), mp 81–91°C (CH3OH). The acid hydrolysis of (I) and (II) leads to fraxetin. On the basis of the results of a study of acetylation products and the spectral characteristics (IR, UV, PMR, and mass spectra) it has been established that obtusicin has the structure of 8-hydroxy-7-(4′-hydroxy-3′-methyl-but-2′-enyloxy)-6-methoxycoumarin.

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Literature cited

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Authors
  1. É. Kh. Batirov
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  2. A. D. Matkarimov
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  3. V. M. Malikov
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  4. M. R. Yagudaev
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  5. E. Seitmuratov
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Additional information

Complex Institute of Natural Sciences of the Karakalpak Branch of the Academy of Sciences of the Uzbek SSR, Nukus, and Institute of the Chemistry of Plant Substances of the Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Pridodnykh Soedinenii, No. 6, pp. 785–789, November–December, 1980.

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Batirov, É.K., Matkarimov, A.D., Malikov, V.M. et al. New coumarins ofHaplophyllum obtusifolium . Chem Nat Compd 16, 558–561 (1980). https://doi.org/10.1007/BF00564857

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  • DOI: https://doi.org/10.1007/BF00564857

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