Reaction of the fischer base with nitro- and bromo-substituted o-hydroxycinnamaldehydes

Chunaev, Yu. M.; Przhiyalgovskaya, N. M.; Gal'bershtam, M. A.; Kurkovskaya, L. N.; Karpova, M. V.

doi:10.1007/bf00508670

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Spirooxepines and Spirooxocines2

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2004

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“…In attempts to obtain spiro-2H-oxocines 28, Fischer's base was allowed to react with 2-hydroxycinnamaldehyde, but the reaction resulted in the products (28a) of condensation of two molecules of the methylene base with a molecule of the aldehyde. 87 With 3,5-dinitrocinnamaldehyde, the black crystalline open form 28b was formed in a moderate yield, but it could not be rearranged to the corresponding spirocyclic isomer 28.…”

Section: Spirooxepines and Spirooxocinesmentioning

confidence: 99%