Cyclopropanation ofN-vinylimidesviaa redox-neutral photocatalysed radical addition/anionic cyclisation process

Cyclopropylamine synthesis: using halomethyl radicals as the CH 2 source, photoredox-catalysed cyclopropanation of N -vinylimides could proceed well, giving modular access to 1- or 2-arylcyclopropylamines.