Ruthenium carbonyl complexes supported by pyridine-alkoxide ligands: synthesis, structure and catalytic oxidation of secondary alcohols
作者:Siqi Zong、Kang Liu、Xiaohui Yue、Zhiqiang Hao、Zhihong Ma、Zhangang Han、Guo-Liang Lu、Jin Lin
DOI:10.1039/c9nj03222c
日期:——
Five novel trinuclear ruthenium complexes [[PyCHC(RC6H4)O]2Ru3(CO)8] [R = 4-OMe (6), 4-Br (7), 4-CF3 (8)] and [[PyCH2CH(RC6H4)O]2Ru3(CO)8] [R = 2-Br (9), 2-CF3 (10)], were synthesized by treating Ru3(CO)12 with two equivalents of the corresponding pyridine-alcohols PyCH2CH(RC6H4)OH [1–5, R = 4-OMe, 4-Br, 4-CF3, 2-Br and 2-CF3] in refluxing toluene. The structures of 6–10 were fully characterized by
五个新颖的三核钌配合物[[PyCH C(RC 6 H 4)O] 2 Ru 3(CO)8 ] [R = 4-OMe(6),4-Br(7),4-CF 3(8)]和[[PyCH 2 CH(RC 6 H 4)O] 2 Ru 3(CO)8 ] [R = 2-Br(9),2-CF 3(10)]通过处理Ru 3(CO)合成12与两个当量的相应吡啶醇PyCH 2 CH(RC在回流甲苯中的6 H 4)OH [ 1-5,R = 4-OMe,4-Br,4-CF 3,2 -Br和2-CF 3 ]。通过IR和NMR光谱,元素分析和X射线单晶衍射对6-10的结构进行了充分表征。发现它们是NMO氧化仲醇的有效催化剂,可在15分钟内以良好至极好的收率得到相应的酮,其中[PyCHC(4-OCH 3 C 6 H 4)O] 2 Ru 3( CO) 8( 6)是最好的。