Abstract: | (2+3)-Cycloaddition of polyfluorinated aliphatic nitrile oxides, generated in situ, to donor dipolarophiles takes place regioselectively to give the 5-substituted isoxazolines, and is limited by the donor and steric properties of the dipolarophiles.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, 663–667, May, 1989. |