Heteroleptic ruthenium(II) complexes of 2-(2-pyridyl)benzimidazoles: A study of catalytic efficiency towards transfer hydrogenation of acetophenone
摘要:
Six ruthenium(II) complexes ([RuCl2(p-cymene)(L1-6)], SD1-6, (L1-6: bidentate pyridyl-benzimidazole ligands)) were synthesized from [RuCl2(p-cymene)](2) dimer and bidentate pyridyl-benzimidazole ligands. The compounds were characterized by elemental analysis, IR, UV-Vis, NMR and X-ray diffraction. The synthesized Ru(II) complexes (SDI-6) were tested as catalysts for the catalytic transfer hydrogenation (CH) of acetophenone to secondary alcohols in the presence of KOH using 2-propanol as a hydrogen source at 82 degrees C. All complexes were active catalysts for TM of acetophenone with good yields under mild conditions (after 15 min, yields of up to 91%). (C) 2014 Elsevier Ltd. All rights reserved.
Selective C–H trifluoromethylation of benzimidazoles through photoredox catalysis
作者:Guo-Lin Gao、Chao Yang、Wujiong Xia
DOI:10.1039/c6cc08975e
日期:——
This protocol presented a new strategy for visible-light induced C-H trifluoromethyltion at C4 of benzimidazoles using Togini's reagent in the presense of fac-Ir(ppy)3. It's Highlighted by its operational simplicity, mild...
Complexes of substituted derivatives of 2-(2-pyridyl)benzimidazole with Re(i), Ru(ii) and Pt(ii): structures, redox and luminescence properties
作者:Nail M. Shavaleev、Z�e R. Bell、Timothy L. Easun、Ramune Rutkaite、Linda Swanson、Michael D. Ward
DOI:10.1039/b411341a
日期:——
N,N'-Chelating ligands based on the 2-(2-pyridyl)benzimidazole (PB) core have been prepared with a range of substituents (phenyl, pentafluorophenyl, naphthyl, anthracenyl, pyrenyl) connected to the periphery via alkylation of the benzimidazolyl unit at one of the N atoms. These PB ligands have been used to prepare a series of complexes of the type [Re(PB)(CO)(3)Cl], [Pt(PB)(CCR)(2)](where -CCR is an
Cationic palladium(<scp>ii</scp>) complexes as catalysts for the oxidation of terminal olefins to methyl ketones using hydrogen peroxide
作者:Qun Cao、David S. Bailie、Runzhong Fu、Mark J. Muldoon
DOI:10.1039/c4gc02465f
日期:——
Ligated Pd(II) complexes have been studied for the catalytic oxidation of terminal olefins to their corresponding methyl ketones.
已经研究了连接的Pd(II)配合物用于将末端烯烃催化氧化为相应的甲基酮。
Synthesis of 2-Alkynoates by Palladium(II)-Catalyzed Oxidative Carbonylation of Terminal Alkynes and Alcohols
作者:Qun Cao、N. Louise Hughes、Mark J. Muldoon
DOI:10.1002/chem.201602558
日期:2016.8.16
PdII catalyst, utilizing a simple and inexpensive amine ligand (TMEDA), allows 2‐alkynoates to be prepared in high yields by an oxidativecarbonylation of terminal alkynes and alcohols. The catalyst system overcomes many of the limitations of previous palladiumcarbonylation catalysts. It has an increased substrate scope, avoids large excesses of alcohol substrate and uses a desirable solvent. The catalyst
Novel heteroleptic ruthenium complexes—RD1, RD5, RD10 and RD11—with ligands based on benzimidazole were synthesized and characterized for application to dye-sensitized solar cells (DSSC); the remarkable performance of RD5-based DSSC is understood for its superior light-harvesting ability and slower charge-recombination kinetics.