Ionic Liquid-Promoted Regiospecific Friedlander Annulation: Novel Synthesis of Quinolines and Fused Polycyclic Quinolines
作者:Sanjay S. Palimkar、Shapi A. Siddiqui、Thomas Daniel、Rajgopal. J. Lahoti、Kumar V. Srinivasan
DOI:10.1021/jo035153u
日期:2003.11.1
Several room-temperature ionic liquids (ILs) based on 1-butylimidazolium salts with varying anions were synthesized and evaluated for the preparation of biologically active substituted quinolines and fused polycyclic quinolines using the Friedlander heteroannulation reaction. On screening, 1-butylimidazolium tetrafluoroborate [Hbim]BF4 was found to be the best ionic liquid for the heteroannulation reaction
A Novel Preparation of 4-Phenylquinoline Derivatives in Ionic Liquids
作者:Xinying Zhang、Xuesen Fan、Jianji Wang、Yanzhen Li
DOI:10.1002/jccs.200400194
日期:2004.12
A novelpreparation of 4-phenylquinolinederivatives through acid-catalyzed Friedlander reaction in ionicliquid ([bmim][BF 4 ]) is described. The preparative procedure presented in this paper is operationally simple andenvironmentally benign. The reaction media and the catalyst used can be recovered and reused for at least four times without loss in the catalytic activity.
The synthesis of substitutedquinolines can be easily and greenly accomplished by the direct reaction between the corresponding aminoalcohol and ketone using PEG‐400 as reaction medium in the presence of a base, without any transition‐metal catalyst.