Homogeneous oxidation of alcohols in water catalyzed with Cu(II)-triphenyl acetate/bipyridyl complex

ÜNVER H., KANİ İ.

POLYHEDRON, vol.134, pp.257-262, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 134
  • Publication Date: 2017
  • Doi Number: 10.1016/j.poly.2017.06.030
  • Journal Name: POLYHEDRON
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.257-262
  • Keywords: Catalysis, Copper, Complex, Oxidation, Alcohol, AEROBIC OXIDATION
  • Anadolu University Affiliated: Yes

Abstract

A water-soluble mononuclear copper(II) complex, [Cu(OOCC(C6H5)(3))(C10H8H2)(H2O)](ClO4)(CH3OH) (triphenylacetic acid = HOOCC(C6H5)(3), 2-2'-bipyridyl (bipy) = C10H8N2) was synthesized and used as a catalyst precursor in the oxidation of primary (cinnamyl alcohol, benzyl alcohol, cyclohexanol, and 1-heptanol) and secondary alcohols (1-phenylethanol, 3-pentanol, and 2-octanol) to corresponding aldehydes, ketones, and acids. The complex exhibited high catalytic activity toward benzyl alcohol to benzaldehyde as one product (97% conversion in 6 h) and cinnamyl alcohol to benzaldehyde (91.5%) and cinnamaldehyde (6.6%), in 6 h reaction time with less catalyst loading (1 mol%) at a moderate temperature (70 degrees C). Water was used as a solvent and H2O3 as an oxidant for alcohol oxidation. Thus, the Cu(II)/H2O/H2O2 catalytic system could serve as an environmentally benign "green chemistry" alternative to oxidation methods in traditional organic solvents. (C) 2017 Elsevier Ltd. All rights reserved.