New Synthesis of 2-Heteroarylperfluoropropionic Acids Derivatives by Reaction of AzineN-Oxides with Hexafluoropropene
作者:Rafał Loska、Mieczysław Mąkosza
DOI:10.1002/chem.200701416
日期:2008.3.7
Hexafluoropropene reacts with aromatic azine N-oxides under mild conditions to produce fluorides of 2-heteroarylperfluoropropionic acids. The reaction proceeds as 1,3-dipolar cycloaddition followed by spontaneous scission of the N--O bond in the isoxazolidine ring and elimination of HF. When the reaction is carried out in the presence of alcohols or N-alkyl anilines, the in situ formed acyl fluorides