13708-12-8Relevant articles and documents
Effect of Blocked ortho-Positions on the Cyclisation of Aryl-1,4-diazabuta-1,3-dienyl Radicals
McNab, Hamish,Smith, Graeme S.
, p. 996 - 997 (1982)
Indoles are the main products from the cyclisation of (2,6-dimethylphenyl)-1,4-diazabuta-1,3-dienyl radicals, together with small amounts of quinoxalines; both ring systems arise predominantly via an intermediate spirodienyl radical.
Palladium Nanoparticles Stabilized by Metal–Carbon Covalent Bonds as an Expeditious Catalyst for the Oxidative Dehydrogenation of Nitrogen Heterocycles
Sun, Xiao-Tao,Zhu, Jie,Xia, Yun-Tao,Wu, Lei
, p. 2463 - 2466 (2017)
The first method for the dehydrogenation of nitrogen heterocycles catalyzed by a palladium nanocatalyst was developed. Carbon–metal covalent-bond-stabilized nanoparticles were found to be efficient for the dehydrogenation process in the presence of tert-butyl hydroperoxide. A variety of N-heterocycles were transformed into functionalized quinolines in medium to excellent yields in water as the solvent under mild conditions by a simple operation.
Acceptorless Dehydrogenation of N-Heterocycles and Secondary Alcohols by Ru(II)-NNC Complexes Bearing a Pyrazoyl-indolyl-pyridine Ligand
Wang, Qingfu,Chai, Huining,Yu, Zhengkun
, p. 584 - 591 (2018/03/08)
Ruthenium(II) hydride complexes bearing a pyrazolyl-(2-indol-1-yl)-pyridine ligand were synthesized and structurally characterized by NMR analysis and X-ray single crystal crystallographic determinations. These complexes efficiently catalyzed acceptorless dehydrogenation of N-heterocycles and secondary alcohols, respectively, exhibiting highly catalytic activity with a broad substrate scope. The present work has established a strategy to construct highly active transition metal complex catalysts and provides an atom-economical and environmentally benign protocol for the synthesis of aromatic N-heterocyclic compounds and ketones.
Acceptorless dehydrogenation of nitrogen heterocycles with a versatile iridium catalyst
Wu, Jianjun,Talwar, Dinesh,Johnston, Steven,Yan, Ming,Xiao, Jianliang
supporting information, p. 6983 - 6987 (2013/07/26)
Gas up: A cyclometalated iridium complex is found to catalyze the dehydrogenation of various benzofused N-heterocycles, thus releasing H 2. Driven by as low as 0.1 mol % catalyst, the reaction affords quinolines, indoles, quinoxalines, isoquinolines, and β-carbolines in high yields. Copyright
