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Communication | Regular issue | Vol 22, No. 11, 1984, pp.2463-2466
Published online, 1st January, 1970
DOI: 10.3987/R-1984-11-2463
Ring Transformations of Oxazoles. Novel Rearrangements of Ethyl 5-Ethoxy-β-oxo-2-phenyl-4-oxazolepropionate to 4-Benzoylaminopyrazoles and 5-Benzoylaminopyrimidines

Ignatius J. Turchi* and Thomas G. Cullen

*Agricultural Chemical Group, FMC Corporation, P.O. Box 8, Princeton, New Jersey 08543, U.S.A.


Reaction of ethyl 5-ethoxy-β-oxo-2-phenyl-4-oxazolepropionate (1) with hydrazines or guanidines provides the 4-benzoylaminopyrazoles 3a and b or the 2-amino-5-benzoylaminopyrimidines 5a and b respectively.