Facile one-pot synthesis of polysubstituted quinolines under solvent-free conditions using sulfamic acid as a reusable catalyst
作者:Min Zhang、Biao Xiong、Wei Yang、D. N. T. Kumar、Yu-Qiang Ding
DOI:10.1007/s00706-011-0590-7
日期:2012.3
one-pot synthesis of polysubstitutedquinoline derivatives has been demonstrated by using sulfamic acid as a reusablecatalystundersolvent-freeconditions. The synthetic method provides the basis and advantages of a simple experimental procedure and easy recovery and reuse of catalyst, which makes it a highly practical and environmentally benign pathway for the synthesis of polysubstituted quinolines
Synthesis of 2,3-disubstituted quinolines from in situ generated imines and its enamine tautomer under radical cation induced conditions
作者:Xiaodong Jia、Fangfang Peng、Chang Qing、Congde Huo、Yaxin Wang、Xicun Wang
DOI:10.1016/j.tetlet.2013.07.014
日期:2013.9
A tandem cyclization/aromatization of anilines and aldehydes was achieved under catalytic radicalcation salt induced conditions, producing a series of 2,3-disubstituted quinolines in good yields. In this reaction, the in situ generated imine tautomerizes to enamine, which acts as a dienophile to participate in the tandem cyclization, and further elimination of the anilino group triggers the aromatization
Efficient One-Pot Synthesis of 2-Alkylquinolines under Solvent-Free Conditions Using Sulfonic Acid Functionalized Ionic Liquid as a Recoverable and Reusable Catalyst
作者:Min Zhang、Yuqiang Ding、Biao Xiong、Ting Wang、Li Wang
DOI:10.3987/com-11-12289
日期:——
Sulfonic acid functionalized ionic liquid (FIL-A) was firstly used as a recoverable and reusable catalyst for the synthesis of 2-alkylquinoline derivatives from simple and readily available alkylaldehydes and arylamines. The method has the advantages of simple experimental procedure, easy recovery and reuse of catalyst, solvent-free and mild reaction conditions, excellent functional group tolerance, etc. which makes it a highly practical and environmentally benign pathway for the synthesis of 2-alkylquinolines.
Oxidant Effect of H<sub>2</sub>O<sub>2</sub>for the Syntheses of Quinoline Derivatives via One-Pot Reaction of Aniline and Aldehyde
A convenient one-pot method for the synthesis of substituted quinolines via the reaction of aniline and aldehyde in the presence of a Lewis acid (AlCl3) and an oxidant (H2O2) has been developed. Hydrogen peroxide was found to promote the reaction by its function as a hydrogen hunter, hindering the formation of by-product N-alkylaniline. The effect of the oxidant on the yield and selectivity was studied. When the molar ratio of aniline, n-butyraldehyde, and H2O2 was 1:3:0.5 at 25 degrees C, the yield of 3-ethyl-2-propylquinoline was improved from 64% (reaction without H2O2) to 84% (with H2O2), and the quinoline selectivity was improved to almost 100%. Moreover, the reaction time was obviously reduced. The substituent effect was also investigated in this work.
Synthesis of substituted quinolines via the condensation of anilines with aliphatic and aromatic aldehydes in the presence of transition metal and rare-earth metal catalysts
作者:U. M. Dzhemilev、F. A. Selimov、R. A. Khusnutdinov、A. A. Fatykhov、L. M. Khalilov、G. A. Tolstikov
DOI:10.1007/bf00961307
日期:1991.6
Novel catalyst complexes derived from transition metal and rare-earth metal compounds have been developed for the condensation of anilines with aliphatic and aromatic aldehydes to give the corresponding 2,3-disubstituted quinolines in high yields.