Transfer Hydrogenation of Ketones and Catalytic Oxidation of Alcohols with Half-Sandwich Complexes of Ruthenium(II) Designed Using Benzene and Tridentate (S, N, E) Type Ligands (E = S, Se, Te)
作者:Pradhumn Singh、Ajai K. Singh
DOI:10.1021/om100807b
日期:2010.12.13
and 2.6234(6)−2.6333(7) Å, respectively. Complexes 1−6 have been found to be efficient catalysts for catalytic oxidation of alcohols with N-methylmorpholine-N-oxide, tBuOOH, NaOCl, and NaIO4 and transfer hydrogenation reaction of ketones with 2-propanol. The TON values are up to 9.9 × 104 and 9.8 × 104 for two catalytic processes, respectively. The oxidation probably involves the formation of intermediate
组合物的复合物FAC - [(η 6 -C 6 H ^ 6)的Ru(大号)] [PF 6 ] [X](1 - 6 ; X = PF 6或Cl),通过反应形成2- MESC 6 ħ 4 = NCH 2 CH 2 E-C 6 H ^ 4 -4-R(L1 - L3)和2- MESC 6 ħ 4 CH 2 -NHCH 2 CH 2 E-C 6 H ^ 4 -4-R(L4 - L6)(其中,E = S或Se,R = H; E =碲,R = OME)与[(η 6 -C 6 H ^ 6)的RuCl(μ-Cl)的} 2 ]和NH 4 PF 6,已经其特征在于1 H,13 C 1 H},77 Se 1 H}和125 Te 1 H} NMR光谱法和X射线晶体学。Ru-Se和Ru-Te键长分别在2.4837(14)-2.4848(14)和2.6234(6)-2.6333(7)Å范围内。配合物1 -