The reaction of flavanone pinostrobin with dibromoalkanes in acetone in the presence of potassium carbonate followed the path of retro-Michael addition – О-alkylation and resulted in the formation of the respective 2-(bromoalkoxy)chalcones. Treatment of the latter with sodium azide gave the respective azides, which were highly active in the Сu-catalyzed 1,3-dipolar cycloaddition reaction. The reaction of these azides with 6-substituted 7-ethynylcoumarins gave coumarin-chalcone hybrids containing a 1,2,3-triazole linker.
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This work received financial support from the Russian Science Foundation (grant No. 14-13-00822) and Partnering Program for Basic Research of the Siberian Branch of Russian Academy of Sciences and CIS Countries (project No. 108).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, 2015, 51(2), 146–152
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Mukusheva, G.K., Lipeeva, A.V., Zhanymkhanova, P.Z. et al. The flavanone pinostrobin in the synthesis of coumarin-chalcone hybrids with a triazole linker. Chem Heterocycl Comp 51, 146–152 (2015). https://doi.org/10.1007/s10593-015-1672-y
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DOI: https://doi.org/10.1007/s10593-015-1672-y