Abstract
Partial cis-N-halogenation of methyl 2-aziridinecarboxylate (Azy–OMe) takes place only under conditions of intramolecular hydrogen bond breaking under the action of F2 in the presence of Et3N, and also under the action of KOCI in the presence of H2O; for the N-fluoro derivative, a record high nitrogen inversion barrier was found (ΔG#35 kcal mol–1).
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