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DOI: 10.1055/s-0035-1562496
Synthesis of Quinolines via Iron-Catalyzed Redox Condensation of Alcohols with 2-Nitrobenzyl Methyl Ether/2-Nitrobenzyl Alcohols
Publikationsverlauf
Received: 22. April 2016
Accepted after revision: 20. Mai 2016
Publikationsdatum:
30. Juni 2016 (online)


Abstract
An iron-catalyzed redox condensation of 2-nitrobenzyl alcohols, formic acid, and alcohols has been developed, which affords substituted quinolines with carbon dioxide and water as the only side products. With the use of formic acid as a redox moderator to fill the electron gap of the global redox condensation process, the reaction goes smoothly with a smaller amount of alcohol in comparison to previous reports (i.e. 1.2 equiv versus 3.3–4 equiv). The reaction goes equally well when 2-nitrobenzyl methyl ether was used instead of 2-nitrobenzyl alcohol under otherwise identical conditions, shedding a new light on the study of this quinoline synthetic method.
Key words
quinolines - 2-nitrobenzyl alcohols - iron catalysis - redox condensation - Friedländer annulationSupporting Information
- Supporting information for this article is available online at http://dx.doi.org/10.1055/s-0035-1562496.
- Supporting Information