Abstract
Bicyclo[3.3.1]nonane system is an important structural motif in many natural compounds. This article describes a short synthetic route to the bicyclo[3.3.1]nonane system via aldol condensation. The proposed strategy is based on the use of cyclohex-2-en-1-ones containing an additional carbonyl group in the side chain as a key precursor. The approach showed good results for compounds with electron-donating groups in aromatic substituents. An obvious advantage of such synthesis of bicyclo[3.3.1]nona-3,6-dien-2-ones is that it involves two steps and requires only two building blocks, namely a Mannich base and ethyl acetoacetate.
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Translated from Zhurnal Organicheskoi Khimii, 2023, Vol. 59, No. 7, pp. 935–945 https://doi.org/10.31857/S0514749223070078.
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Mikhalyonok, S.G., Bezborodov, V.S., Kuz’menok, N.M. et al. Synthesis of 4,6-Diarylbicyclo[3.3.1]nona-3,6-dien-2-ones. Russ J Org Chem 59, 1171–1179 (2023). https://doi.org/10.1134/S1070428023070072
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DOI: https://doi.org/10.1134/S1070428023070072