Chiral 1-aminoalkyl chloromethyl ketimines 2 are synthesized in enantiomerically pure form starting from 1-aminoalkyl chloromethyl ketones 1 and different amines. Reduction of amino ketimines 2 and subsequent spontaneous cyclization affords aminoalkyl aziridines 3 with high diastereoisomeric excess and without detectable racemization.
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Concellón et al. (2001) studied this question.
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