Jiang D, Jia J, Wang B, Li B. Access to 5-fluoroalkylated trisubstituted oxazoles
via copper-catalyzed cyclization of α-fluoroalkyl-α-diazoketones with amides.
Chem Commun (Camb) 2022;
58:4853-4856. [PMID:
35348157 DOI:
10.1039/d2cc01057g]
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Abstract
A novel copper-catalyzed cyclization of α-fluoroalkyl-α-diazoketones with (thio)amides has been developed. This mechanistically distinct protocol provides a robust and straightforward approach to construct 5-fluoroalkylated trisubstituted oxazoles and thiazoles with high efficiency and excellent functional group compatibility. Experimental studies suggest a mechanism involving imidate ligand migratory insertion of a copper carbenoid as the key step.
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