ortho-Disubstituted<i>F</i>-Benzenes. V. Intramolecular Heteroatom-facilitated ortho-Substitution of<i>F</i>-Benzene Derivatives with Oxazolinyl and Oxazinyl Groups
oxazolinyl substituents on an F-benzene ring facilitated the substitution of fluorine ortho to the heterocyclic functional groups by carbon and nitrogen nucleophiles. Alkylmagnesium halides and alkyllithium compounds were employed as the carbon nucleophile, and lithium N-methylanilide and N-methylanilinomagnesium halide as the nitrogen nucleophile. The selective ortho-substitution was accomplished by the