Abstract
Thermally initiated [4+2]-cycloaddition of 4,5-diaroyl-1H-pyrrole-2,3-dione and cyclopentadiene as a dienophile afforded substituted 5a,8,8a,8b-tetrahydro-1H-cyclopenta[5,6]pyrano[4,3-b]pyrrole-2,3-diones whose structure was determined by X-ray analysis of one of the products. The reaction was regio- and diastereoselective, and only one endo-hetero-Diels–Alder adduct was formed. The described reaction provides a convenient preparative route to difficultly accessible substituted cyclopenta[5,6]pyrano[4,3-b]pyrrole derivatives.
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This study was supported under financial support by the Perm Scientific and Educational Center “Rational Use of Earth’s Interior,” 2021.
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Translated from Zhurnal Organicheskoi Khimii, 2022, Vol. 58, No. 3, pp. 264–269 https://doi.org/10.31857/S0514749222030041.
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Moroz, A.A., Antonov, D.I., Dmitriev, M.V. et al. Regio- and Diastereoselective [4+2]-Cycloaddition of 4,5-Diaroyl-1H-pyrrole-2,3-diones and Cyclopentadiene. Russ J Org Chem 58, 282–286 (2022). https://doi.org/10.1134/S1070428022030046
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DOI: https://doi.org/10.1134/S1070428022030046