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Synthesis 2018; 50(06): 1368-1372
DOI: 10.1055/s-0036-1591738
DOI: 10.1055/s-0036-1591738
paper
A New, Simple, and General Synthesis of N-Oxides of Iodopyridines and Iodoquinolines via the Diazotization–Iodination of Heterocyclic Amino N-Oxides in the Presence of p-Toluenesulfonic Acid in Water
The research was funded by the Tomsk Polytechnic University Competitiveness Enhancement Program grant, Project Number VIU-TOVPM-316/2017. EAK thanks RFBR grant 17-03-01097.Weitere Informationen
Publikationsverlauf
Received: 10. Oktober 2017
Accepted after revision: 15. November 2017
Publikationsdatum:
13. Dezember 2017 (online)


Abstract
The diazotization of a series of N-oxides of aminopyridines and aminoquinolines under the action of sodium nitrite in the presence of KI and p-TsOH in water at room temperature leads to the formation of the corresponding N-oxides of iodopyridines and iodoquinolines in high yields. The method has a general character and can be used for the preparation of 3-, 2-, and 4- N-oxides of iodopyridines.
Supporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/s-0036-1591738.
- Supporting Information