were transformed to give 4-(2-fluoroallyl)oxazol-5(4H)-ones in a Steglich-type, Ireland-Claisen rearrangement. The latter compounds gave either N-aroyl-substituted 2-amino-4-fluoro-2-methyl- or 2-amino-4-fluoro-2-phenylalk-4-enoic acids in excellent yields by hydrolysis or substituted 2-aryl-4-fluoro-6-phenylpy-ridines in a cascade reaction initiated by an aza-Cope rearrangement to form thermally unstable