Heterocyclic Compounds
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ChemInform Abstract: Nitrogen Bridgehead Compounds. Part 76. Synthesis and Stereochemistry of Ethyl 9-Benzylidene-6,7,8,9-tetrahydro-2-oxo-2H- and -4-oxo-4H-pyrido(1,2-a)pyrimidine-3-carboxylates and Their Homologues.
First published: January 2, 1990
Abstract
Reaction of the 4-oxo carboxylates (III) with benzaldehyde (II) at low temp. yields the kinetically stable adducts (I), while higher temp. lead to the thermodynamically stable condensation products (IV).
ChemInform Abstract
Reaction of the 4-oxo carboxylates (III) with benzaldehyde (II) at low temp. yields the kinetically stable adducts (I), while higher temp. lead to the thermodynamically stable condensation products (IV). By the same procedure, the 2-oxo condensation products (V) are prepared. The compounds thus obtained may be of interest for the synthesis of biologically active derivatives.
