(1-Alkyltetrahydroquinolin-8-yl)methylidene-1H-imidazol-5(4H)-ones undergo spirocyclization by the action of SnCl4 via 1,5-hydride shift to form spirocyclic julolidine derivatives in 68–97% yields.
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This work was supported by the Russian Science Foundation (grant no. 20-73-10195).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, 2022, 58(4/5), 255–259
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Shirokova, V.V., Smirnov, A.Y., Zaitseva, E.R. et al. Synthesis of julolidine derivatives via SnCl4-promoted spirocyclization of (1-alkyltetrahydroquinolin-8-yl)methylidene-1H-imidazol-5(4H)-ones. Chem Heterocycl Comp 58, 255–259 (2022). https://doi.org/10.1007/s10593-022-03080-z
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DOI: https://doi.org/10.1007/s10593-022-03080-z