Abstract
Tetrahydro-1H,7H-benzo[ij]quinolizine-1,7-diones have been obtained by the cyclization of N-alkoxyphenyl-N-(2-carboxyethyl)-β-alanines. Fission of the ester bond occurs on cyclization of N-(4-ethoxyphenyl)-N-(2-carboxyethyl)-β-alanine, but the cyclization of the 3,4-dialkoxyphenyl derivative leads to the formation of 9-alkoxy-8-hydroxy-2,3,5,7-tetrahydro-1H,7H-benzo[ij]quinolizine-1,7-diones. The corresponding dioximes and diphenylhydrazones were obtained.
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Kantminene, K., Mikul'skene, G., Hormi, O. et al. Synthesis of Tetrahydro-1H,7H-benzo[ij]quinolizine-1,7-dione Derivatives. Chemistry of Heterocyclic Compounds 38, 422–428 (2002). https://doi.org/10.1023/A:1016027204806
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DOI: https://doi.org/10.1023/A:1016027204806