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- W1974448670 abstract "4-Oxo-4H-chromen-3-carboxaldehyde 1 reagieren mit den 4-Aminouracilen 2, 6 und 10 in Abhängigkeit vom Lösungsmittel zu strukturell unterschiedlichen Pyrido[2,3-d]pyrimidinen. Während die Umsetzung in dipolar aprotischen Solventien zu den 6H-[1]Benzopyrano[3,4-g]pyrido[2,3-d]pyrimidinen 4 und 8 führt, entstehen in siedendem Eisessig die 6-(2-Hydroxybenzoyl)-pyrido[2,3-d]pyrimidine 5, 9 und 14.. Reactions of Heterocycles Containing a 2-Acyl-2propenone Structure, II: Pyrido[2,3-d]pyrimidines from 4-oxo-4H-chromene-3-carbaldehydes and 4-Aminouraciles Depending on the solvent, 4-oxo-4H-chromene-3-carbaldehydes 1 react with 4-aminouraciles 2,6 and 10 to yield pyrido[2,3-d]pyrimidines of different structures. In dipolar aprotonic solvents the 6H-[l]benzopyrano[3,4-g]pyrido[2,3-d]pyrimidines 4 and 8 are formed. In hot glacial acetic acid the 6-(2-hydroxybenzoyl)pyrido[2,3-d]pyrimidines 5, 9 and 14 are obtained." @default.
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- W1974448670 date "1983-01-01" @default.
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- W1974448670 title "Reaktionen an Heterocyclen mit 2-Acyl-2-propenon-Teilstruktur, 2. Mitt.1,2) Pyrido[2,3-d]pyrimidine aus 4-Oxo-4H-chromen-3-carboxaldehyden und 4-Aminouracilen" @default.
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- W1974448670 doi "https://doi.org/10.1002/ardp.19833160112" @default.
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