Abstract
The oxidation of cage compounds derived from quinopimaric acid, namely γ-diketone, oxa-“bird cage,” 18-chloro-15-oxa-“bird cage,” and 16-sulfanyl-15-oxa-“bird cage,” was studied using a number of oxidating agents, including sodium percarbonate in trifluoroacetic acid at 0°C, 36% hydrogen peroxide in acetone at room temperature, and tert-butyl hydroperoxide in the presence of MoCl5 in boiling benzene. It was shown for the first time that the oxidation of diterpene oxa-“bird cages” led to the formation of mixtures of keto lactones (Baeyer–Villiger oxidation products), in which 7,10-dioxo-6-oxaheptacyclo[11.8.0.03,8.04,12.05,11.09,13.016,21]heneicosane was the major component.
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ACKNOWLEDGMENTS
The NMR spectra were recorded using the equipment of the Chemistry joint center, Ufa Institute of Chemistry, Russian Academy of Sciences.
Funding
This study was performed in the framework of state assignment no. 1021062311395-6-1.4.1 (Synthesis of Biologically Active Compounds Based on Natural Compounds. Design of Environmentally Benign Materials and Technologies).
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Dedicated to Full Member of the Russian Academy of Sciences G.A. Tolstikov on his 90th anniversary
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Vafina, G.F., Lobov, A.N. Oxidation of Cage Derivatives of Quinopimaric Acid. Russ J Org Chem 60, 423–429 (2024). https://doi.org/10.1134/S1070428024030084
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DOI: https://doi.org/10.1134/S1070428024030084