Abstract
The convergent synthesis of biosynthetic precursors of brassinosteroids with a Δ2-bond in cycle A—secasterol and 24-episecasterol—was performed. The key stages in the construction of the side chain in these compounds were the Julia olefination of the steroid 22-aldehyde followed by the Sharpless asymmetric dihydroxylation of the intermediate Δ22-olefin. The cytotoxicity of the synthesized compounds for breast carcinoma MCF-7 cells was assessed.
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Abbreviations
- (DHQD)2-PHAL:
-
hydroquinidine 1,4-phthalazinediyl diether
- MTT:
-
3-(4,5-dimethylthiazolyl-2)-2,5 diphenyltetrazolium bromide
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Original Russian Text © V.A. Khripach, V.N. Zhabinskii, O.V. Gulyakevich, O.V. Konstantinova, A.Yu. Misharin, A.R. Mekhtiev, V.P. Timofeev, Ya.V. Tkachev, 2010, published in Bioorganicheskaya Khimiya, 2010, Vol. 36, No. 6, pp. 815–824.
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Khripach, V.A., Zhabinskii, V.N., Gulyakevich, O.V. et al. Synthesis of secasterol and 24-episecasterol and their toxicity for MCF-7 cells. Russ J Bioorg Chem 36, 746–754 (2010). https://doi.org/10.1134/S1068162010060117
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DOI: https://doi.org/10.1134/S1068162010060117