Conjugates of betulinic acid with 2-(fluoroacyl)cycloalkane-1,3-dione motifs were synthesized by reacting 3-chloro-2-(fluoroacyl)-2-cycloalkene-1-ones with an equivalent amount of betulinic acid aminoalkylamide hydrochlorides in the presence of Et3N in CHCl3. Reduction of betulonic acid conjugates with 2-trifluoroacetylcyclopentane-1,3-dione by NaBH4 in THF produced betulinic acid derivatives containing 2-(1-hydroxy-2,2,2-trifluoroethyl)cyclopentane-1,3-dione. The cytotoxicity of the synthesized compounds was assessed against glioblastoma multiforme (U-87 MG) and breast cancer cell lines (MCF7).
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The work was financially supported by the National Academy of Sciences of Belarus and the Siberian Branch, Russian Academy of Sciences (Grant X15CO-001, Project 0302-2015-0003).
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Translated from Khimiya Prirodnykh Soedinenii, No. 6, November–December, 2018, pp. 936–940.
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Khlebnikova, T.S., Piven’, Y.A., Lakhvich, F.A. et al. Synthesis and Cytotoxicity of Conjugates of Betulinic Acid and F-Containing 2-Acylcycloalkane-1,3-Diones. Chem Nat Compd 54, 1100–1105 (2018). https://doi.org/10.1007/s10600-018-2565-y
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DOI: https://doi.org/10.1007/s10600-018-2565-y