Catalytic oxidation of alcohols with novel non-heme <i>N</i><sub>4</sub>-tetradentate manganese(<scp>ii</scp>) complexes
作者:Vincent Vermaak、Desmond A. Young、Andrew J. Swarts
DOI:10.1039/c8dt03808b
日期:——
non-heme N4-tetradentate Mn(OTf)2 complexes of the type, [(L)MnOTf2], where L = R,R and S,S enantiomers of BPMCN, its 6-methyl and 6-bromo derivatives as well as the novel ligand BMIMCN (BPMCN = N,N′-dimethyl-N,N′-bis(2-pyridylmethyl)-(R,R/S,S)-1,2-diaminocyclohexane, BMIMCN = N,N′-dimethyl-N,N′-bis(1-methyl-2-imidazolemethyl)-(R,R/S,S)-1,2-diaminocyclohexane). Solid state structural analysis of the BMIMCN-ligated
我们报道了[[L] MnOTf 2 ]类型的一系列新型非血红素N 4-四齿Mn(OTf)2配合物的制备和表征,其中L = BPMCN的R,R和S,S对映体,其6-甲基和6-溴衍生物以及新型配体BMIMCN(BPMCN = N,N'-二甲基-N,N'-双(2-吡啶基甲基)-(R,R / S,S)-1, 2-二氨基环己烷,BMIMCN = N,N'-二甲基-N,N′-双(1-甲基-2-咪唑甲基)-(R,R / S,S)-1,2-二氨基环己烷)。BMIMCN连接的Mn-三氟甲磺酸盐配合物(R,R -C4和S,S -C4)的固态结构分析显示相反的螺旋度,但相同的金属位点可及性。在过氧化氢为氧化剂,乙酸为助催化剂的伯醇和仲醇的催化氧化中,利用了这一特性。配合物R,R -C4和S,S -C4由于BMIMCN配体的供电子特性,苯甲醇具有最高的苯甲醇氧化活性。络合物S,S -C4,对多种伯醇底物显示出高活