Journal of the Chemical Society. Perkin transactions II p. 1485 - 1490 (1983)
Update date:2022-08-04
Topics:
Tsukube, Hiroshi
Maruyama, Kazuhiro
Araki, Takeo
A new type of copper complex composed of intermediate sized ligands was employed as catalyst in the autoxidation of phenols.Among a series of copper catalists containing urea and thiourea ligands, intermediate sized oligomer ligand <(3), (5), and (8)>-CuCl2 complexes showed effective catalytic activities in the oxidative coupling of 2,6-xylenol.Reaction rates were high and there was excellent coupling selectivity.The catalytic properties were much different both from those of smaller ligand-copper complexes and from those of polymeric ligand-copper complexes, and seemed to be characteristic of the present type of catalysts.
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