Abstract
The lactone of gossypolic acid, obtained by the demethylation of the tetramethyl ether of gossypolic acid, forms with acetic acid a stable complex having the 1∶4 composition. The crystallographic parameters of single crystals are as follows:a=20.251(2) Å, b=12.028(3) Å, c=15.934(4) Å, V=3881.2(2.3) Å3,Z=4, D calc=1.32 g/cm3, sp. gr. Pbcn. The molecule is characterized by considerable strain because of the formation of the five-membered lactone ring the atoms of which are coplanar with the atoms of the naphthyl fragment. Unlike the clathrates of racemic gossypol and dianilinegossypol, the gossypolic acid lactone — acetic acid comples does not belong to the type of clathrate inclusion compounds.
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A. S. Sadykov Institute of Bioorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Ul. Akad. Kh. Abdullaeva, 83. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 458–463, July–August, 1999.
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Talipov, S.A., Mardanov, R.G., Ibragimov, B.T. et al. X-ray structural investigation of gossypol and its derivatives XXIX. Molecular and crystal structure of a complex of gossypolic acid lactone with acetic acid. Chem Nat Compd 35, 409–414 (1999). https://doi.org/10.1007/BF02282505
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DOI: https://doi.org/10.1007/BF02282505