Abstract
Two isomeric bicyclic dihydropyridopyrimidinones (II and IV), the methyl esters of the corresponding N-pyridyl-β-alanines (V), and a number of other compounds are formed during the reaction of methyl acrylate with 2-amino-5-halopyridines in the presence of acid catalysts. Compounds II and IV were hydrolytically cleaved, and some derivatives of N-(5-halo-2-pyridyl)-β-alanines were obtained.
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