Highly asymmetric cobalt-catalyzed aziridination of alkenes with trichloroethoxysulfonyl azide (TcesN(3))

A Co(II)-based catalytic system has been developed for asymmetric aziridination of alkenes with trichloroethoxysulfonyl azide (TcesN(3)) under mild conditions, forming the corresponding N-Tces-aziridines in high yields and excellent enantioselectivities.