Synthesis of 2-Aryl-3-trifluoromethylquinolines Using (E)-Trimethyl(3,3,3-trifluoroprop-1-enyl)silane
摘要:
The Hiyama cross-coupling reaction of (E)-trimethyl (3,3,3-trifluoroprop-1-enyl)silane (1) with 2-iodoaniline (2) proceeded without any protection of the amino group. The coordination of copper(II) fluoride to 2,2'-bipyridyl provided the fluoride source required to trigger this reaction, affording (E)-2-(3,3,3-trifluoroprop-1-enyl)aniline (3). In the presence of a stoichiometric amount of [Cu(OTf)](2)center dot C6H6, the treatment of 3 with an aryl aldehyde at 200 degrees C provided the 2-aryl-3-trifluoromethylquinoline (4) via the oxidative cyclization of an in situ-generated imine substructure.
The Hiyama cross-coupling reaction of (E)-trimethyl (3,3,3-trifluoroprop-1-enyl)silane (1) with 2-iodoaniline (2) proceeded without any protection of the amino group. The coordination of copper(II) fluoride to 2,2'-bipyridyl provided the fluoride source required to trigger this reaction, affording (E)-2-(3,3,3-trifluoroprop-1-enyl)aniline (3). In the presence of a stoichiometric amount of [Cu(OTf)](2)center dot C6H6, the treatment of 3 with an aryl aldehyde at 200 degrees C provided the 2-aryl-3-trifluoromethylquinoline (4) via the oxidative cyclization of an in situ-generated imine substructure.
Asymmetric Transfer Hydrogenation of 3-(Trifluoromethyl)quinolines
作者:Yong-Gui Zhou、Ran-Ning Guo、Zhang-Pei Chen、Xian-Feng Cai
DOI:10.1055/s-0033-1338661
日期:——
acid-catalyzed asymmetrictransferhydrogenation of 3-(trifluoromethyl)quinolines was successfully developed with up to 98% ee. The new method provides a direct and facile access to chiral 2,3-disubstituted 1,2,3,4-tetrahydroquinoline derivatives containing a stereogenic trifluoromethyl group. A chiral phosphoric acid-catalyzed asymmetrictransferhydrogenation of 3-(trifluoromethyl)quinolines was successfully