N-Methylation of Amines with Methanol Catalyzed by a Cp*Ir Complex Bearing a Functional 2,2′-Bibenzimidazole Ligand
摘要:
A new type of Cp*Ir complex bearing a functional 2,2'-bibenzimidazole ligand was designed, synthesized, and found to be a highly effective and general catalyst for the N-methylation of a variety of amines with methanol in the presence of a weak base (0.3 equiv of Cs2CO3).
Ruthenium-catalyzed acceptorless dehydrogenative coupling of o-aminobenzyl alcohols with ketones to quinolines in the presence of carbonate salt
作者:Xiangchao Xu、Yao Ai、Rongzhou Wang、Liping Liu、Jiazhi Yang、Feng Li
DOI:10.1016/j.jcat.2020.12.016
日期:2021.3
Cl][Cl] was designed, synthesized and found to be a general and highly efficient catalyst for the synthesis of quinolines via acceptorless dehydrogenative coupling of o-aminobenzyl alcohols with ketones in the presence of carbonate salt. It was confirmed that NH units in the ligand are crucial for catalytic activity. The application of this catalytic system for the scale-gram synthesis of biologically
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.
An efficient and convenient Cu(OAc)2/air mediated oxidative coupling of azoles via C–H activation
作者:Yan Li、Jun Jin、Weixing Qian、Weiliang Bao
DOI:10.1039/b919396k
日期:——
An efficient and convenient approach to construct CâC bonds at the 2-position of azoles via Cu(OAc)2/air mediated oxidative homo- and cross-coupling reaction was reported. The corresponding products were obtained in good to excellent yield.
Efficient synthesis of biazoles by aerobic oxidative homocoupling of azoles catalyzed by a copper(i)/2-pyridonate catalytic system
作者:Mingwen Zhu、Ken-ichi Fujita、Ryohei Yamaguchi
DOI:10.1039/c1cc15363c
日期:——
A highly efficient and convenient CuCl/2-pyridonate catalytic system for oxidativehomocoupling of azoles affording a biazole product has been developed. With this system, a variety of biazoles have been effectively synthesized in good to excellent yields in the presence of a very small amount of copper catalyst (1.0 mol%). It was feasible to employ air as a green oxidant.
Halo-Bridged Abnormal NHC Palladium(II) Dimer for Catalytic Dehydrogenative Cross-Coupling Reactions of Heteroarenes
作者:Sreejyothi P、Samaresh Chandra Sau、Pavan K. Vardhanapu、Swadhin K. Mandal
DOI:10.1021/acs.joc.8b01053
日期:2018.8.17
This work describes the dehydrogenative coupling of heteroarenes using a dimeric halo-bridged palladium(II) catalyst bearing an abnormal NHC (aNHC) backbone. The catalyst can successfully activate the C–Hbond of a wide range of heteroarenes, which include benzothiazole, benzoxazole, thiophene, furan, and N-methylbenzimidazole. Further, it exhibited good activity for heteroarenes bearing various functional