Abstract
Fluorinated acetonitrile oxides, generated from the corresponding hydroximoyl bromides in the presence of aryl, hetaryl, ferrocenyl, and cycloaliphatic thioketones, undergo efficient [3 + 2]-cycloadditions to give 3- fluoroalkylated 1,4,2-oxathiazoles in good to excellent yields. The reactions proceed regioselectively with no competitive formation of furoxans as dimers of the intermediate 1,3-dipoles.