A mechanistic study of transfer hydrogenation catalyzed by cyclometallated ruthenium half-sandwich complexes
作者:Noor U. Din Reshi、Dineshchakravarthy Senthurpandi、Ashoka G. Samuelson
DOI:10.1016/j.jorganchem.2018.04.028
日期:2018.7
Transfer hydrogenation of aromatic ketones catalyzed by eight cyclometallated ruthenium half-sandwich complexes, including three new complexes, was examined. The catalytic process was studied using different ratios of substrate to base and base to catalyst and using a deuterated reductant. Optimum conditions for catalysis were shown to be in the presence of higher amounts of base in refluxing isopropanol
Cyclometallation of arylimines and nitrogen-containing heterocycles via room-temperature C–H bond activation with arene ruthenium(ii) acetate complexes
作者:Bin Li、Thierry Roisnel、Christophe Darcel、Pierre H. Dixneuf
DOI:10.1039/c2dt31401k
日期:——
methanol at room temperature produces stable (N^C)-cyclometallated ruthenium(II) complexesvia C–H bond activation/deprotonation. This method can be applied also to nitrogen-containing molecules: N-phenylpyrazole, 2-phenyl-2-oxazoline and benzo[h]quinoline. N-Phenyl-pyrazole, [RuCl2(p-cymene)]2 and diphenylacetylene directly lead to alkyneinsertion into the metallacycle C–Ru bond.
Ruthenium(II)-Catalyzed Chelation-Assisted Desulfitative Arylation of Benzo[h]quinolines with Arylsulfonyl Chlorides
作者:Yi-Xin Xu、Yu-Qing Liang、Zhong-Jian Cai、Shun-Jun Ji
DOI:10.1021/acs.orglett.2c00542
日期:2022.4.15
chelation-assisted C–H arylation reaction of benzo[h]quinoline is described. This transformation, using [RuCl2(p-cymene)]2 as the catalyst and cheap and easily accessible arylsulfonylchlorides as the arylation source, featured simple reaction conditions, a broad substrate scope, and functional group tolerance. The successful application of some bioactive-molecule-based sulfonyl chlorides further highlighted
在此,描述了苯并[h]喹啉的新型螯合辅助 C-H 芳基化反应。该转化以[RuCl 2 ( p -cymene)] 2为催化剂,廉价易得的芳基磺酰氯为芳基化源,具有反应条件简单、底物范围广、官能团耐受性高等特点。一些基于生物活性分子的磺酰氯的成功应用进一步突出了这种脱硫 C-H 芳基化方案的潜在用途和重要性。