Tetranuclear vanadium complex, (VO)(4)(hpic)(4): a recyclable catalyst for oxidation of benzyl alcohols with molecular oxygen.
Vanadium(iv) complexes bearing 3-hydroxypicolinic acid (H(2)hpic) as ligands, VO(Hhpic)(2) (1) and the cyclic tetramer (VO)(4)(hpic)(4) (2), have excellent catalytic ability for the oxidation of a variety of primary and secondary benzyl alcohols with molecular oxygen in acetonitrile or protic solvents such as ethanol and water, affording the corresponding aldehydes and ketones, respectively. Construction of multi-nuclear complexes by the selection of ligands attains higher turnover numbers and recycling of the catalyst.
Kodama
Shintaro
S
Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan.
Ueta
Yukihiro
Y
Yoshida
Jun
J
Nomoto
Akihiro
A
Yano
Shigenobu
S
Ueshima
Michio
M
Ogawa
Akiya
A
D001592:Benzyl Alcohols / Q000737:chemistry*; D002384:Catalysis; D008024:Ligands; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D010848:Picolinic Acids / Q000737:chemistry*; D014639:Vanadium / Q000737:chemistry*
D001592:Benzyl Alcohols; D008024:Ligands; D009942:Organometallic Compounds; D010848:Picolinic Acids; D014639:Vanadium; C049246:3-hydroxypicolinic acid; D010100:Oxygen