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Report | Regular issue | Vol 20, No. 6, 1983, pp.1083-1088
Published online, 1st January, 1970
DOI: 10.3987/R-1983-06-1083
Nitrogen Bridgehead Compounds Part 39. Synthesis and Reactions of 3-Phenoxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-ones

Mária Balogh, István Hermecz, Ildikó Szilágyi, and Zoltán Mészáros

*CHINOIN Pharmaceutical and Chemical Works Ltd., P. O. Box 110, H-1325 Budapest, Hungary


3-Phenoxy- and 3-chloro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-ones (2) and (5) were prepared by the reactions of 2-aminopyridines and 2-phenoxy- or 2-chloroacetoacetate (4) and (7) in a mixture of phosphoryl chloride — polyphosphoric acid. The ring-transformation reactions of the pyridopyrimidines (2b) and (5b), and hydrogenation and nitration of the phenoxy derivatives (2) were also studied.