Photochemical oxidation of a quinophthalone dye
Abstract
Self-sensitised and Methylene Blue- or Rose Bengal-sensitised photo-oxidation of 2-(2-quinolyl)indane-1,3-dione (1) in solution gives phthalic acid, quinoline-2-carbaldehyde, and quinoline-2-carboxylic acid, via the reaction of singlet oxygen with (1).