The use of a dual palladium/organic photoredox catalytic system enables the directed arylation of arenes with aryldiazonium salts with a broad substrate scope at room temperature under mild reaction conditions. This study thus serves as not only an alternative route for the biaryl motifs but also a new example for the application of an organic photoredox catalyst.
Ruthenium-Catalyzed Enantioselective Hydrogenation of Phenanthridine Derivatives
作者:Zhusheng Yang、Fei Chen、Shuxin Zhang、Yanmei He、Nianfa Yang、Qing-Hua Fan
DOI:10.1021/acs.orglett.7b00419
日期:2017.3.17
first asymmetrichydrogenation of phenanthridines catalyzed by chiralcationic ruthenium diamine complexes has been developed with up to 92% ee and full conversions. The choice of the counteranion of the catalyst was found to be critical for achieving high enantioselectivity. In addition, the obtained 5,6-dihydrophenanthridine could be used as a chiral hydride donor for organocatalytic asymmetric transfer
Organocatalytic, Oxidative, Intramolecular CH Bond Amination and Metal-free Cross-Amination of Unactivated Arenes at Ambient Temperature
作者:Andrey P. Antonchick、Rajarshi Samanta、Katharina Kulikov、Jonas Lategahn
DOI:10.1002/anie.201102984
日期:2011.9.5
atom‐economical and environmentally friendly organocatalytic method for intramolecular CH amination, the CN bond forms at ambient temperature by abstraction of two atoms of hydrogen; only acetic acid and water are formed as by‐products. The method has also been extended to the unprecedented metal‐free cross‐amination of nonactivated arenes.
Transition-metal-free and organic solvent-free conversion of <i>N</i>-substituted 2-aminobiaryls into corresponding carbazoles <i>via</i> intramolecular oxidative radical cyclization induced by peroxodisulfate
作者:Palani Natarajan、Priya Priya、Deachen Chuskit
DOI:10.1039/c7gc03130k
日期:——
benign approach for the synthesis of N-substituted carbazoles from analogous 2-aminobiaryls using peroxodisulfate in water is reported. The reactions proceeded through an intramolecular oxidative radical cyclization of N-substituted 2-aminobiaryls with in situ reoxidation of the resulting radical species. When compared to known methods for the synthesis of N-substituted carbazoles from 2-amidobiaryls, this
Ruthenium-catalyzed ortho-arylation of acetanilides with aromatic boronic acids: an easy route to prepare phenanthridines and carbazoles
作者:Ravi Kiran Chinnagolla、Masilamani Jeganmohan
DOI:10.1039/c3cc49398a
日期:——
A regioselective ruthenium-catalyzed ortho-arylation of acetanilides with aromatic boronic acids is described. Later, ortho-arylated acetanilides were converted into phenanthridine and carbazole derivatives.