Chemistry of Heterocyclic Compounds p. 611 - 616 (1988)
Update date:2022-08-02
Topics:
Kirpichenok, M.A.
Gorozhankin, S.K.
Grandberg, I.I.
The reaction of 7-aminocoumarins with triethyloxonium tetrafluoroborate leads to benzopyrylium salts that react with sodium derivatives of compounds that contain an active methylene group to give substituted 2-methylene-2H-1-benzopyrans.The structures and physicochemical properties of the synthesized compounds are discussed.
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