A mild, general preparation of N-acyl aziridines and 2-substituted 4(S)-benzyloxazolines

Abstract
The conversion of a wide range of carboxylic acids into their acyl imidazolides with subsequent addition of an aziridine rapidly gives a quantitative yield of the corresponding N-acyl aziridines.Iodide (or bromide) ion catalysed rearrangement of N-acyl 2(S)-benzylaziridines 1 to oxazolines 6 proceeds quantitatively.

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