A. G. Ismail, D. Wibberley
1968
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0
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Journal
Journal of The Chemical Society C: Organic
Abstract
Pyrano[4,3-d]pyrimidin-5-ones, formed by the action of bromine in acetic acid on 4-styrylpyrimidine-5-carboxylic acids, yield pyrido[4,3-d]pyrimidin-5(6H)-ones on treatment with amines. Nucleophilic replacement reactions of some 5-substituted pyrido[4,3-d]pyrimidines are reported.