Crystal structure of pseudokopsinine and its salts
Sh. M. AdizovYunusov Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of UzbekistanБ. ТашходжаевYunusov Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of UzbekistanR.Zh. KunafievSadykov Institute of Bioorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of UzbekistanM.M. MirzaevaYunusov Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of UzbekistanP. Kh. YuldashevYunusov Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of Uzbekistan
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Аннотация
The X-ray diffraction study of an indoline alkaloid, pseudokopsinine, extracted from the plant Vinca erecta and its mono- and double salts is performed. The experimentally determined positions of Н atoms suggest the sp 3 hybridization of the indoline nitrogen atom in the base and salts. The pseudokopsinine base and double salt have an intramolecular Н bond between the NH group proton and the ether oxygen atom of the methoxycarbonyl group, which is absent in the monosalt and the related indolines. The intermolecular Н bonds and/or the packing efficiency cause a conformational change in F and Е heterocycles in the indoline hetero framework of pseudokopsinine salts in comparison with that observed in the base.
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