Fig. 3. Visible-light source comparison: N-phenylmetacrylamide (1) (1.0 equiv.), (4-bromopiperidin-1-yl)(phenyl)methanone (2) (1.5 equiv.), Na2CO3 (2.0 equiv.), (Me3Si)3SiH, Ir[dF(CF3)ppy]2(dtbbpy)PF6 (1 mol%) in MeOH. [a] Assay yields for desired product was determined using standard HPLC techniques. [b] Ring = Aldrich® Micro Photochemical Reactor. [c] Lamp = Kessil® A160WE Tuna Blue Light. [d] Reactor = 13.2W Merck Photoreactor.
