Chemistry of Heterocyclic Compounds p. 1060 - 1065 (1990)
Update date:2022-08-02
Topics:
Tolmachev, A. I.
Shulezhko, L. M.
Briks, Yu. L.
Kachkovskii, A. D.
The reaction of 3-formylchromone with quaternary salts of nitrogen heterocycles containing active methyl or methylene groups was investigated.It is shown that the compounds obtained can be used in the synthesis of merocyanine dyes containing an o-hydroxybenzoyl substituent in the polymethine chain.Dicarbocyanine with such a substituent were not isolated, evidently because of the high electrophilicity of the polymethine chain and the ease of formation of a six-membered heteroring.
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