An efficient catalytic method is presented for the hydrogenation of N‐heterocycles. The iridium‐based catalyst operates under mild conditions in water without any co‐catalyst or stoichiometric additives. The catalyst also promotes the reverse reaction of dehydrogenation of N‐heterocycles, hence displaying appropriate characteristics for a future hydrogen economy based on liquid organic hydrogen carriers
as a visible-light photoredox catalyst for the atom-transfer radicaladdition (ATRA) of benzyl halides to styrenes and silyl enol ethers. The resulting ATRA products can be readily converted into tetrahydroquinolines. Cu(dap)2Cl has been utilized as a visible-light photoredox catalyst for the atom-transfer radicaladdition (ATRA) of benzyl halides to styrenes and silyl enol ethers. The resulting ATRA
Half-Sandwich Ruthenium Complexes for One-Pot Synthesis of Quinolines and Tetrahydroquinolines: Diverse Catalytic Activity in the Coupled Cyclization and Hydrogenation Process
作者:Xue-Jing Yun、Jing-Wei Zhu、Yan Jin、Wei Deng、Zi-Jian Yao
DOI:10.1021/acs.inorgchem.0c00955
日期:2020.6.1
the direct one-pot synthesis of tetrahydroquinoline derivatives from amino alcohols and ketones has been also developed on the basis of the continuous catalytic activity of this rutheniumcatalyst in the selective hydrogenation of the obtained quinoline derivatives with a low catalyst loading. The corresponding products, quinolines and tetrahydroquinoline derivatives, were afforded in good to excellent
作者:Yan Wang、Baobiao Dong、Zikun Wang、Xuefeng Cong、Xihe Bi
DOI:10.1021/acs.orglett.9b01055
日期:2019.5.17
A ligand- and base-free silver-catalyzed reduction of quinolines and electron-deficient aromatic N-heteroarenes in water has been described. Mechanistic studies revealed that the effective reducing species was Ag–H. This versatile catalytic protocol provided facile, environmentally friendly, and practical access to a variety of 1,2,3,4-tetrahydroquinoline derivatives at room temperature.
A simple and readily available cyclopentadiene-based Brønstedacid was employed to catalyze the transferhydrogenation of 2-substituted quinolines using Hantzsch ester as the hydrogen source. This conceptually new designed organocatalyst demonstrates remarkably high efficiency for this transformation and a variety of substituted 1,2,3,4-tetrahydroquinoline derivatives were afforded in excellent yields