Tetrahedron p. 14497 - 14506 (1997)
Update date:2022-08-02
Topics:
Veronese, Augusto C.
Callegari, Rosella
Morelli, Carlo F.
Vicentini, Chiara B.
β-Alkoxycarbonyl-β-enaminoketoesters 1a,b react with hydrazines to give pyrazole orthodicarboxylic acid derivatives 3, 4 and 5. Similarly la reacts with hydroxylamine to give isoxazole 6 and with amidines and guanidine to give pyrimidine ortho-dicarboxylic acid monoesters 7a-c. The total or partial hydrolysis of selected heterocycles afforded the dicarboxylic acids 8, 9 and 10 and the dicarboxylic acid monoesters 11 and 12.
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Doi:10.1039/c2ob00017b
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