The reaction of the steroidal alkaloid solasodine with formaldehyde, terminal arylalkynes, 2-ethynylpyridine, propiolic acid methyl ester, or (trimethylsilyl)acetylene with heating to 100°C in 1,4-dioxane in the presence of CuI synthesized the corresponding N-(prop-2-ynyl)spiro solanes as mixtures of (22R,25R)- and (22S,25R)-diastereomers in 28–81% yields and 1.6–1:1–1.7 ratios of stereoisomers. The cytotoxicities of the new solasodine derivatives against T98G, U-87, MT-4, and MDA-MB-231 human tumor cells were tested in vitro.
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Acknowledgment
The work was supported by a grant from the Russian Science Foundation (Project No. 18-13-00361). We thank staff of the Khimiya Center for Collective Use, SB, RAS, for performing the spectral and analytical studies.
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Translated from Khimiya Prirodnykh Soedinenii, No. 1, January–February, 2023, pp. 77–82.
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Finke, A.O., Mironov, M.E., Pokrovskii, M.A. et al. Mannich Reaction of Solasodine with Acetylenes and Formaldehyde. Cytotoxicity of N-Propargyl-Substituted Alkaloid Derivatives. Chem Nat Compd 59, 87–93 (2023). https://doi.org/10.1007/s10600-023-03924-w
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DOI: https://doi.org/10.1007/s10600-023-03924-w