Iridium-Catalyzed C-H Borylation of CF 3 -Substituted Pyridines

Iridium-catalyzed C-H borylation of CF -substituted pyridines is described in this paper. The boronic ester group can be installed on the α, β, or γ position of pyridine by an appropriate substitution pattern. Sterically governed regioselectivity provides convenient access to a variety of CF -substi...

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Published in:ACS omega 2022-04, Vol.7 (13), p.11460-11472
Main Authors: Shahzadi, Hafiza Tayyaba, Fatima, Saman, Akhter, Naseem, Alazmi, Meshari, Nawaf, Alshammari, Said, Kamaleldin B, AlGhadhban, Amer, Sulieman, Abdel Moneim E, Saleem, Rahman Shah Zaib, Chotana, Ghayoor Abbas
Format: Article
Language:English
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Summary:Iridium-catalyzed C-H borylation of CF -substituted pyridines is described in this paper. The boronic ester group can be installed on the α, β, or γ position of pyridine by an appropriate substitution pattern. Sterically governed regioselectivity provides convenient access to a variety of CF -substituted pyridylboronic esters. These catalytic C-H borylation reactions were carried out neatly without the use of any solvent. Several functional groups, such as halo, ester, alkoxy, amino, etc., are compatible with this methodology. These pyridylboronic esters are amenable to column chromatography and the products were isolated in good to excellent yields. α-Borylated pyridines, although isolated in good yields, do not have a long shelf life. The boronic ester derivatives of these CF -substituted pyridines can serve as useful precursors in the synthesis regime.
ISSN:2470-1343
2470-1343
DOI:10.1021/acsomega.2c00773