Abstract
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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Literature Cited
M. A. Kirpichenok, S. L. Levchenko, and I. I. Grandberg, Khim. Geterotsikl. Soedin., No. 10, 1324 (1987).
K. Drexhage, in: Dye Lasers, ed. F. P. Schaefer, Springer Verlag, New York (1974).
G. Jones, W. R. Jackson, Ch. Choi, and W. R. Bergmark, J. Phys. Chem., 89, 294 (1985).
A. Katritzky (ed.), Advances in Heterocyclic Chemistry, Supplement 2, Academic Press, New York-London (1982), p. 434.
M. Simalty, H. Strzelecka, and H. Khedija, Tetrahedron, 27, 3503 (1971).
H. Meerwein, W. Florian, H. Schön, and G. Stopp, Annalen, 1, 1 (1961).
M. A. Kirpichenok, I. I. Grandberg, L. K. Denisov, and L. M. Mel'nikova, Izv. Timiryazevsk. Skh. Akad., No. 3, 172 (1985).
E. T. Oestensen, Acta Chem. Scand., B29, 927 (1975).
A. R. Reddy, D. V. Prasad, and M. Darbarwar, J. Photochem., 32, 69 (1986).
H. A.-E. Rafie and A. H. E.-T. Bahgat, Can. J. Chem., 63, 1173 (1985).
Weygand-Hilgetag, in: Experimental Methods in Organic Chemistry, Saunders, Philadelphia (1969).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 751–756, June, 1988.
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Kirpichenok, M.A., Gorozhankin, S.K. & Grandberg, I.I. Reactions of 7-aminocoumarins leading to alkylidenebenzopyrans. Chem Heterocycl Compd 24, 611–616 (1988). https://doi.org/10.1007/BF00475593
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DOI: https://doi.org/10.1007/BF00475593