Abstract
A convenient preparative synthesis of 3-methoxyestra-1,3,5(10),16-tetraene-17-carb-aldehyde and its epimeric 13α-analog, the key structures in the synthesis of steroid estrogen receptor modulators and potential antitumor agents, was developed starting from estrone and including the generation of intermediate 16-dehydro-17-carbonitriles and their reaction with diisobutylaluminum hydride. The influence of conformational dif erences in the steroid molecules with the natural 13β- and epimeric 13α-configurations on the reactivity of intermediate compounds and the stereoselectivity of the trimethylsilyl cyanide addition to the carbonyl group of methyl ethers of epimeric estrones was considered.
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This work was financially supported by the Russian Foundation for Basic Research (Project No. 19-03-00-246).
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2350–2354, December, 2019.
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Tserfas, M.O., Kuznetsov, Y.V., Levina, I.S. et al. Key structures for the synthesis of steroid antitumor agents. Synthesis of 16-dehydro-17-carbaldehydes of 13β- and 13α-estratriene series. Russ Chem Bull 68, 2350–2354 (2019). https://doi.org/10.1007/s11172-019-2710-1
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DOI: https://doi.org/10.1007/s11172-019-2710-1