Symmetric ureas were synthesized with high efficiency and selectivity by oxidative carbonylation of aromatic and aliphatic amines in the presence of resin immobilized gold, e.g. 1475 ofTOF and 99% of selectivity were achieved when using aniline as the substrate. No other organic solvent was used in the reactions and highly pure porducts could be obtained due to the high selectivity and the easy separation of the catalyst from the reaction system.

Key words: RESIN, GOLD, SUPPORTED CATALYST, CATALYTIC OXIDATION, PROPANAMINE P, CARBONYL SYNTHESIS, CARBONYLATION, UREA, PHENYL UREA GROUP HERBICIDES, SYMMETRY