Abstract
Conjugates of terpenoids with 1,3,5-trisubstituted pyrazoles were synthesized by the cross-coupling of methyl 16-(2-chloro-2-oxoacetyl)labdatrienoate with terminal arylacetylenes via the Castro—Stephens reaction and heterocyclization of arylalkyne-1,2-diones with arylhydr-azines. The structure of one reaction product was established by X-ray diffraction. The conditions for the formation of furanolabdanoid arylalkyne-1,2-diones were found. The newly synthesized pyrazoles exhibit analgesic activity in a model of chemical irritation.
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Dedicated to Academician of the Russian Academy of Sciences M. S. Yunusov on the occasion of his 80th birthday.
We would like to acknowledge the staff of the Multi-Access Chemical Service Center of the Siberian Branch of the Russian Academy of Sciences for spectral and analytical measurements.
This study was financially supported by the Russian Science Foundation (Project Nos 17-73-10274 and 18-13-00361).
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 0537–0546, March, 2020.
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Mironov, M.E., Poltanovich, A.I., Rybalova, T.V. et al. Synthesis and analgesic activity of 1,3,5-trisubstituted pyrazoles containing a diterpenoid moiety. Russ Chem Bull 69, 537–546 (2020). https://doi.org/10.1007/s11172-020-2795-6
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DOI: https://doi.org/10.1007/s11172-020-2795-6