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Intramolecular 1,3-dipolar cycloaddition at the periphery of heterocyclic systems. Part 3. A facile hydrazone-azomethine imine isomerization at the periphery of pyridine and pyrido[1,2-a]pyrimidine systems

โœ Scribed by Bin Sun; Kenji Adachi; Michihiko Noguchi


Book ID
107857713
Publisher
Elsevier Science
Year
1996
Tongue
French
Weight
894 KB
Volume
52
Category
Article
ISSN
0040-4020

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The thermal reaction of N-benzyl-N-[3-(N-substituted imino)methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-2-yl]amino acid esters, generated from aldehyde esters and primary amines, provides 2,3-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyrimidin-4(1H)-one derivatives effectively and stereoselectively. Therein, the