Selective Deoxygenation of Various N-O Bonds Catalyzed by Rhodium Carbonyl Clusters in the Presence of H2O and CO and Their Heterogenization Using Amino-Substituted Polystyrenes

Article abstract of DOI:10.1246/bcsj.64.602

Catalytic deoxygenation of various N-O bonds using rhodium carbonyl compounds under a water gas shift reaction was studied.A catalyst system of Rh6(CO)16 and N,N,N',N'-tetramethyl-1,3-propanediamine was found to have high activities for the following deoxygenations: 1) conversion of nitrobenzenes to anilines, 2) aliphatic nitro compounds to nitriles, 3) oximes to nitriles, 4) hydroxylamines to amines, and 5) amine oxides to amines.The above-mentioned rhodium catalyst system was heterogenized by using amino-substituted polystyrenes.Rh6 and Rh14 carbonyl clusters of ^-, ^2-, and ^4-, were formed on the polymer surface.The characteristic features of the catalysis of the polymer-bound rhodium cluster complexes are described in relation to the corresponding homogenous ones.