Abstract
On the basis of a study of the PMR spectra and alternative synthesis it was established that the “dicondensed” products of the reaction of Fischer's base with o-hydroxycinnamaldehydes are not oxocine derivatives, as was previously assumed, but rather are bisindoline spirochromans that are identical to the products of the reaction of vinylogs of Fischer's base with salicylaldehydes.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 352–355, March, 1982.
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Chunaev, Y.M., Przhiyalgovskaya, N.M., Gal'bershtam, M.A. et al. Reaction of Fischer's base with o-hydroxycinnamaldehydes. Chem Heterocycl Compd 18, 265–268 (1982). https://doi.org/10.1007/BF00522125
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DOI: https://doi.org/10.1007/BF00522125