Synthese von 4H-Pyrano[2,3-d]pyrimidinen |
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Authors: | ?tefan Marchalín Du?an Ilavský Milan Bruncko |
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Institution: | (1) Lehrstuhl der Organischen Chemie, Slovakische Technische Hochschule, CS-812 37 Bratislava, SSR |
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Abstract: | Summary Good yields of substituted 5-(5R-2-furyl)-4H-pyrano2,3-d]pyrimidines4 were obtained in the reaction of 2-ethoxymethyleneamino-3-cyano-4H-pyranes2 with ammonia. Compounds2 were prepared by the condensation of the starting 2-amino-5-acetyl-3-cyano-6-methyl-4H-pyranes1 with ethyl orthoformate. Spectral properties of the bicyclic system4 in relation to compounds3 are discussed. |
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Keywords: | 2-Amino-3-cyano-4H-pyrans 4H-Pyrano[2 3-d]pyrimidines |
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