Ruthenium-catalyzed synthesis of <i>N</i>-substituted lactams by acceptorless dehydrogenative coupling of diols with primary amines
作者:Yanling Zheng、Xufeng Nie、Yang Long、Li Ji、Haiyan Fu、Xueli Zheng、Hua Chen、Ruixiang Li
DOI:10.1039/c9cc06339k
日期:——
Herein, we report the first example of synthesis of N-substituted lactams via an acceptorless dehydrogenative coupling of diols with primaryamines in one step, which was enabled by combining Ru3(CO)12 with a hybrid N-heterocyclic carbene–phosphine–phosphine ligand as the catalyst.
Hemilabile N-heterocyclic carbene (NHC)-nitrogen-phosphine mediated Ru (II)-catalyzed N-alkylation of aromatic amine with alcohol efficiently
作者:Xiao-Jun Yu、Hai-Yu He、Lei Yang、Hai-Yan Fu、Xue-Li Zheng、Hua Chen、Rui-Xiang Li
DOI:10.1016/j.catcom.2017.03.007
日期:2017.5
a novel N-heterocyclic carbene (NHC)-nitrogen-phosphine ligand (1) was synthesized, and the combination of it with [Ru(COD)Cl2]n showed the high activity and selectivity with a low Ru loading of 0.1% for the N-alkylation of amine with alcohol. Especially, for these substrates with pyridine backbone, even if the catalyst loading was as low as 0.01%, good yields (81–95%) of the desired products were
Unsymmetrical Pincer <i>N</i>-Heterocyclic Carbene–Nitrogen–Phosphine Chelated Palladium(II) Complexes: Synthesis, Structure, and Reactivity in Direct Csp<sup>2</sup>–H Arylation of Benzoxazoles
作者:Yaqiu Li、Xiaojun Yu、Yangdiandian Wang、Haiyan Fu、Xueli Zheng、Hua Chen、Ruixiang Li
DOI:10.1021/acs.organomet.8b00005
日期:2018.3.26
unsymmetrical pincer N-heterocyclic carbene–nitrogen–phosphine (CNP) and its palladiumcomplexes PdCl2(κ2-CP) (4) and [PdCl(κ3-CNP)]PF6 (5·PF6) were synthesized. NMR spectra disclosed that the transformation of complex 4 structure occurred in the solution. Further NMR experimental and single crystal structure analysis of complex 4 provided unequivocal and structural evidence for the formation of complex [PdCl(κ3-CNP)]Cl
Ruthenium-Catalyzed Divergent Acceptorless Dehydrogenative Coupling of 1,3-Diols with Arylhydrazines: Synthesis of Pyrazoles and 2-Pyrazolines
作者:Yanling Zheng、Yang Long、Huihua Gong、Jiaqi Xu、Chunchun Zhang、Haiyan Fu、Xueli Zheng、Hua Chen、Ruixiang Li
DOI:10.1021/acs.orglett.2c01497
日期:2022.6.3
1,3-diols with arylhydrazines via acceptorless dehydrogenativecoupling reactions to selectively synthesize pyrazoles and 2-pyrazolines were reported, which were based on Ru3(CO)12/NHC-phosphine-phosphine catalytic systems. The reactions featured low catalyst loading, high selectivity, wide substrate scope, and good yields, with only water and hydrogen gas (H2) as the byproducts.