Year 2005, Month 12 (Section Full Articles, Page 2841)
Synthesis of substituted pyrido[1,2-a]pyrimidines from
2-arylmethylidene-3-f luoroalkyl-3-oxopropionates
M. V. Pryadeina, Ya. V. Burgart, M. I. Kodess, and V. I. Saloutin
Cyclocondensation of 2-arylmethylidene-3-fluoroalkyl-3-oxopropionates with 2-aminopyridine occurs at both the polyfluoroacylvinyl and alkoxycarbonylvinyl fragments to give alkyl 4-aryl-2-polyfluoroalkyl-4H-pyrido[1,2-a]pyrimidine-3-carboxylates and 4-aryl-2-hydroxy-3-polyfluoroacyl-4H-pyrido[1,2-a]pyrimidines, respectively. When treated with copper(II) acetate, the pyrido[1,2-a]pyrimidines yield metal complexes.
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