Abstract
Lithium-iodine exchange on alkyl- or aryl-substituted N-tosyliodoaziridines afforded unstabilized aziridinyllithiums, which were subsequently trapped at low temperatures with a range of carbon and heteroatom electrophiles affording cis-substituted aziridines exclusively. When using isocyanates as electrophiles, access to aziridine carboxamides or 1,3,5-trisubstituted hydantoins can be selected by control of reaction temperature.
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