Visible light photoredox catalysis: regioselective radical addition of aminoalkyl radicals to 2,3-allenoates

The regioselective addition of alpha-aminoalkyl radicals to 2,3-allenoates by visible-light-mediated electron transfer using 1 mol% of Ru(bpy)(3)(BF4)(2) as a photocatalyst was successfully established. This photoredox protocol is a simple and effective method for the synthesis of unsaturated g-aminobutyric ester derivatives.