Access to 5-fluoroalkylated trisubstituted oxazoles <i>via</i> copper-catalyzed cyclization of α-fluoroalkyl-α-diazoketones with amides
作者:Di Jiang、Jingpei Jia、Baiquan Wang、Bin Li
DOI:10.1039/d2cc01057g
日期:——
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
A Facile One-Pot Synthesis of 5-Trifluoromethyl- and 5-Perfluoroalkyloxazoles from N-Alkyl-N-acylamino Acids
作者:Masami Kawase、Masami Kawase
DOI:10.3987/com-93-6508
日期:——
The reaction of N-acyl-N-benzyl-alpha-amino acids with trifluoroacetic or perfluorocarboxylic anhydride in the presence of pyridine affords 5-trifluoromethyl- or 5-perfluoroalkyloxazoles in high yields.