Abstract
Isocembrol C(3)-ketoxime was synthesized regioselectively and the C—C bond was cleaved under the standard Beckmann fragmentation conditions. Subsequent hydrolysis of nitrile to give ω-hydroxy acid and cyclization on treatment with 2,2′-dipyridyl disulfide finalized the synthesis of 15-membered macrolide.
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Acknowledgements
NMR spectra were recorded using the spectrometers of the Center for Collective Use “Khimiya” at the Ufa Institute of Chemistry of the Russian Academy of Sciences and the Regional Ccenter for Collective Use of Unique Equipment “Agidel” at the Ufa Federal Research Center of the Russian Academy of Sciences.
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This work was performed in the framework of the State Tacks (Nos. 123011300044-5 and 122031400259-1).
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Dedicated to the memory of Academician of the Russian Academy of Sciences G. A. Tolstikov (1933–2013).
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, Vol. 72, No. 10, pp. 2466–2472, October, 2023.
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Salikhov, S.M., Faizullina, L.K. & Valeev, F.A. Regiocontrolled cleavage of the isocembrol cycle at the Δ2 bond and its transformation into 15-membered macrolide. Russ Chem Bull 72, 2466–2472 (2023). https://doi.org/10.1007/s11172-023-4048-y
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DOI: https://doi.org/10.1007/s11172-023-4048-y