1252875-88-9Relevant academic research and scientific papers
General asymmetric hydrogenation of 2-alkyl- and 2-aryl-substituted quinoxaline derivatives catalyzed by iridium-difluorphos: Unusual halide effect and synthetic application
Cartigny, Damien,Berhal, Farouk,Nagano, Takuto,Phansavath, Phannarath,Ayad, Tahar,Genet, Jean-Pierre,Ohshima, Takashi,Mashima, Kazushi,Ratovelomanana-Vidal, Virginie
experimental part, p. 4544 - 4556 (2012/07/14)
A general asymmetric hydrogenation of a wide range of 2-alkyl- and 2-aryl-substituted quinoxaline derivatives catalyzed by an iridium-difluorphos complex has been developed. Under mild reaction conditions, the corresponding biologically relevant 2-substit
Asymmetric hydrogenation of 2-and 2,3-substituted ouinoxalines with chiral cationic ruthenium diamine catalysts
Qin, Jie,Chen, Fei,Ding, Ziyuan,He, Yan-Mei,Xu, Lijin,Fan, Qing-Hua
, p. 6568 - 6571 (2012/02/13)
The enantioselective hydrogenation of 2-alkyl- and 2-aryl-subsituted quinoxalines and 2,3-disubstituted quinoxalines was developed by using the cationic Ru(η6-cymene)(monosulfonylated diamine)(BArF) system in high yields with up to 99% ee. The counteranion was found to be critically important for the high enantioselectivity and/or diastereoselectivity.
Iridium-difluorphos-catalyzed asymmetric hydrogenation of 2-alkyl- and 2-aryl-substituted quinoxalines: A general and efficient route into tetrahydroquinoxalines
Cartigny, Damien,Nagano, Takuto,Ayad, Tahar,Genet, Jean-Pierre,Ohshima, Takashi,Mashima, Kazushi,Ratovelomanana-Vidala, Virginie
supporting information; experimental part, p. 1886 - 1891 (2010/10/21)
A highly efficient and general iridium-difluorphos-catalyzed asymmetric hydrogenation of diverse 2-alkyl- and 2-aryl-substituted quinoxalines into biologically and pharmaceutically relevant 2-substituted-1,2,3,4- tetrahydroquinoxaline units has been developed. High isolated yields and excellent enantioselectivities of up to 95% for 2-alkyl-substituted quinoxalines and of up to 94% for 2-aryl-substituted quinoxalines were obtained.
