Chemistry of Heterocyclic Compounds p. 1095 - 1103 (1988)
Update date:2022-09-26
Topics:
Krasnaya, Zh. A.
Stytsenko, T. S.
Bogdanov, V. S.
Dvornikov, A. S.
It is shown that 2-dimethylamino-3-isopropyl(3-dimethylamino)-2H-pyrans are formed in the condensation of aminal acetals of α-isopropyl or α-dimethylamino-β-dimethylaminoacroleins with β-dicarbonyl compounds.It was observed by means of 1H and 13C NMR and UV spectroscopy that they do not undergo valence isomerization to δ-dimethylamino dienones.Under the influence of pulse photoexcitation the 2H-pyrans undergo reversible cleavage of the C-O bond and isomerization to the corresponding dienones.
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