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An efficient synthesis of quinolones usingN-phenyl(triphenylphosphoranylidene)ethenimine

Authors
Journal
Tetrahedron Letters
0040-4039
Publisher
Elsevier
Publication Date
Volume
35
Issue
49
Identifiers
DOI: 10.1016/0040-4039(94)88474-9

Abstract

Abstract The acylphosphoranes 5 formed in a highly selective and sequential manner from the reaction of N-substituted anthranilic acids 1 and N-phenyl(triphenylphosphoranylidene)ethenimine 2 undergo intramolecular Wittig cyclization on the imide carbonyl to afford the pyrrolo- and pyrido[1,2-a]quinolones 6 in moderate to good yields.

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