Abstract
Two dimeric proanthocyanidins have been isolated from the bark and roots of kenaf of variety Uzbekskii 1574. On the basis of chemical transformations and NMR and mass-spectral analyses it has been established that the proanthocyanidins have the structure of a dehydro dimer of 3,3′,4′,5,7-pentahydroxyflavan and that of 8-(3-galloyloxy-3′,4′,5,7-tetrahydroxyflavan-4-yl)-3,3′,4′,5,7-pentahydroxyflavan, respectively, with a C4-C8 (or C6) bond between the flavan moieties.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
L. T. Pashinina, T. K. Chumbalov, V. I. Sheichenko, and R. Zh. Shukenova, Khim. Prir. Soedin., 204 (1978).
K. D. Sears and R. L. Casebin, Chem. Commun., 1437 (1968).
R. S. Tompson, D. Jacques, E. Haslan, and R. I. V. Tanner, J. Chem. Soc., Perkin Trans. I, 1387 (1972).
K. Weinges, W. Bähr, W. Ebert, K. Görits, and H. D. Marx, Fortschs. Chem. Org. Naturstoff.,27, 158 (1969).
K. Weinges, K. Görits, and F. Nader, Ann. Chem., 715 p. 164 (1968).
L. T. Pashinina, N. D. Storozhenko, and T. K. Chumbalov, Khim. Prir. Soedin., 735 (1976).
Additional information
Deceased.
V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 336–340, May–June, 1982.
Rights and permissions
About this article
Cite this article
Van Tkhin', F., Makhsudova, B. & Otroshchenko, O.S. Dimeric proanthocyanidins ofHibiscus cannabinus . Chem Nat Compd 18, 310–314 (1982). https://doi.org/10.1007/BF00580458
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00580458