Abstract 3-Substituted isoquinolin-1-(2H)-ones and fused isoquinolin-1-(2H)-ones have been obtained by the photostimulated S RN 1 reactions of 2-iodobenzamide with the enolates of aromatic (acetophenone, 1-(benzo [d][1, 3] dioxol-5-yl) ethanone, 1-and 2- naphthyl methyl ketones, and 2-, 3-, and 4-acetylpyridine), aliphatic (1-adamantyl methyl ketone), and cyclic ketones (1-and 2-indanone, α-and β-tetralone, and 1-benzosuberone) ...