Iron(III)-Catalyzed and Air-Mediated Tandem Reaction of Aldehydes, Alkynes and Amines: An Efficient Approach to Substituted Quinolines
作者:Ke Cao、Fu-Min Zhang、Yong-Qiang Tu、Xiao-Tao Zhuo、Chun-An Fan
DOI:10.1002/chem.200900875
日期:2009.6.22
Economic and practical advantages are offered by the iron(III)‐catalyzed and air‐mediated tandem coupling/hydroarylation/dehydrogenation of simple readily available aldehydes, alkynes, and amines for the synthesis of 2, 4‐disubstituted quinolines (see scheme).
Enantioselective Metal-Free Hydrogenations of Disubstituted Quinolines
作者:Zhenhua Zhang、Haifeng Du
DOI:10.1021/acs.orglett.5b03307
日期:2015.12.18
A metal-freehydrogenation of 2,4-disubstituted quinolines was realized for the first time using chiral diene derived borane catalysts to furnish the corresponding tetrahydroquinolines in 75–98% yields with 95/5−99/1 dr’s and 86–98% ee’s. This catalytic system was also effective for 2,3-disubstituted quinolines to give moderate to good ee’s.
A Mn(III)‐mediatedradicalcyclization reaction of o‐vinylaryl isocyanides and arylboronic acids or diphenylphosphine oxides to access various 2‐functionalized quinolines under mild conditions was developed. With the introduction of radical stabilizing substituents (e. g. aryl and methyl group) on vinyl group, this reaction provides a regiospecific 6‐endo‐trig radicalcyclization of o‐vinylaryl isocyanides