- Synthetic Reactions of Methyl 2-(2-Amino-3-methoxycarbonyl-4H-1-benzopyran-4-yl)-2-cyanoethanoate
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The title ester characteristically undergoes reactions in which the original 4-substituent is displaced, affording a benzopyran fragment which undergoes addition to reactive compounds at either the 4- or the 2-position.Subsequent rearrangement leads to fo
- O'Callaghan, Conor N.,McMurry, T. Brian H.
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p. 1448 - 1465
(2007/10/02)
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- Eine einfache Synthese von 5H-Benzopyranopyrimidin-Derivaten mit Oxo-, Thioxo- und/oder Imino-Funktionen in 4- und 5-Stellung
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The reaction of 4-dicyanomethylene- or 4--2-(2-hydroxyphenyl)-4H-1,3-benzoxazine with ammonium acetate, hydrogen sulfide, or aqueous acid represents a useful method for the preparation of 4,5-(imino, thioxo, or oxo)-disubstituted 2-(2-hydroxyphenyl)-3,4-dihydro-5H-benzopyranopyrimidines.
- Briel, Detlef,Leistner, Siegfried,Wagner, Guenther
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p. 147 - 150
(2007/10/02)
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