Abstract
Fe(TDCPP) Cl catalyzes the oxidation of simple azo compounds including 4-phenylazoaniline, 4-(phenylazo)-N-methylaniline and 4( phenylazo)-N,N-dimethylaniline (methyl yellow). Methyl yellow and 4-(phenylazo)-N-methylaniline are N-demethylated to form 4-phenylazoaniline prior to further oxidation. Oxidation of 4-phenylazoaniline generates a variety of products as a result of multiple reaction pathways occurring simultaneously. One pathway for the oxidation of 4-phenylazoaniline involves oxidative cleavage of the azo linkage while additional pathways result in modi. cation of 4-phenylazoaniline without cleavage of the azo linkage. One of these additional reaction pathways includes the formation of an additional azo linkage to yield 1,4'-bis(phenylazo) azobenzene. (C) 2007 Elsevier B. V. All rights reserved.