A copper complex bearing a TEMPO moiety as catalyst for the aerobic oxidation of primary alcohols
作者:Zhengliang Lu、José Sánchez Costa、Olivier Roubeau、Ilpo Mutikainen、Urho Turpeinen、Simon J. Teat、Patrick Gamez、Jan Reedijk
DOI:10.1039/b802109k
日期:——
observed as well for the conversion of the non-activated alkyl alcohol octan-1-ol to octanal with a yield of 29% after the same reaction time. The single-crystal X-ray structure of 8 shows that its crystal lattice contains [Cu(I)Br(2)](-) anions which appear to be stabilised by means of both anion-pi and hydrogen bonding interactions. In addition, the solid state structure of 8 exhibits (lone-pair)-pi
设计了一种新的双功能,基于三嗪的配体,目的是生成一个具有TEMPO(2,2,6,6-四甲基哌啶基氧基)部分的铜(II)配合物。由配体4-(2-(3-(吡啶-2-基)-1H-吡唑-1-基)乙氧基)-6-(4-氨基-2,2,6,6-四甲基管)获得的配位化合物吡啶-1-氧基)-N,N-二苯基-1,3,5-三嗪-2-胺(pypzt-1)和溴化铜(II)(即络合物8)能够催化对苯氧的选择性好氧氧化在24小时内将苄醇转化为84%的苯甲醛。铜/ TEMPO配合物的这种“半乳糖氧化酶活性”在未反应的烷基醇octan-1-ol在相同反应时间后以29%的产率转化为辛醛时也观察到。8的单晶X射线结构表明,其晶格包含[Cu(I)Br(2)](-)阴离子,这些阴离子似乎通过阴离子pi和氢键相互作用而得以稳定。另外,8的固态结构在乙腈分子的氮原子和三嗪环之间表现出(孤对)-pi相互作用。通过EPR和磁化率测量研究了8的磁性能。