Аннотация:An azomethine ylide is invoked as an intermediate in the copper-catalyzed addition of diazoesters to imines [Eq. (a)]. Coordinated to the chiral copper(I)–bis(dihydrooxazole) catalyst, these intermediates cyclize to produce enantiomerically enriched 1,3-diaryl-2-carboxyethylaziridines (44–67% ee).
