Cation Radical Aza-Diels-Alder Reaction between <i>N</i>-Arylimines and <i>N</i>-Vinyllactams: A Facile Synthesis of 4-Lactam-<i>N</i>-yl Tetrahydroquinolines
作者:Xiaodong Jia、Li Yang、Bing Han、Wei Zhang、Xiaoling Jin、Zhong-Li Liu
DOI:10.1055/s-2006-942521
日期:2006.9
Cycloaddition of N-arylimines with N-vinylpyrrolidin-2-one or N-vinylazepan-2-one was efficiently induced by tris(4-bromophenyl)aminium hexachloroantimonate producing stereoselectively the corresponding cis-2-aryl-4-(2-oxopyrrolidin-1-yl)- or cis-2-aryl-4-(2-oxoazepan-l-yl)tetrahydroquinoline derivative in good yields.
An efficient aza-Diels–Alder reaction of N-arylimines with N-vinylpyrrolidinone was achieved usingnitrosoniumtetrafluoroborate as a cationradical initiator, giving cis-4-(2-oxopyrrolidin-1-yl)tetrahydroquinolines in various yields.
Mild and Simple Access to Diverse 4-Amino-substituted 2-Phenyl-1,2,3,4-tetrahydroquinolines and 2-Phenylquinolines Based on a Multicomponent Imino Diels–Alder Reaction
作者:P. Prabhakara Varma、Bailure S. Sherigara、Kittappa M. Mahadevan、Vijaykumar Hulikal
DOI:10.1080/00397910903221035
日期:2010.7.12
A straightforward synthesis of new 1-(2-phenyl-1,2,3,4-tetrahydroquinolin-4-yl) pyrrolidin-2-ones/azepan-2-one from N-vinyl caprolactam/N-vinylpyrrolidin-2-one and N-benzylideneaniline via the imino Diels-Alder reaction has been reported for the first time. Antimony(III) chloride has been shown to effectively catalyze imino-Diels-Alder reaction to afford both 2-phenylquinoline and 2-phenyl-1,2,3,4-tetrahydroquinolin derivatives in excellent yields at ambient temperature. The cis diastereoselectivity to give cis 2-phenyl-1,2,3,4-tetrahydroquinolines is also highlighted in this reaction.
Imino Diels-Alder Reactions: Efficient Synthesis of 2-Aryl-4-(2′-oxopyrrolidinyl-1′)-1,2,3,4-tetrahydroquinolines catalyzed by Antimony(III) Sulfate
作者:Aswathanarayana Srinivasa、Kittappa M. Mahadevan、Vijaykumar Hulikal
DOI:10.1007/s00706-007-0777-0
日期:2008.3
Antimony(III) sulfate is found to catalyze the imino Diels-Alder reaction of Schiff's bases with N-vinylpyrrolidin-2-one to afford 2-aryl-4-(2'-oxopyrrolidinyl-1')-1,2,3,4-tetrahydroquinolines. One-pot synthesis of 1,2,3,4-tetrahydroquinolines from 3-nitro benzaldehyde and aromatic amines with N-vinylpyrrolidin-2-one catalyzed by antimony(III) sulfate is also reported. This catalyst is inexpensive, easily available, and it was also found that catalyst could be recovered quantitatively and reused without much loss of catalytic activity.
Tetrahydroquinoline syntheses induced with catalytic amounts of viologen additives
作者:Zheng Xue、Anindya Samanta、Bruce R. Whittlesey、Michael F. Mayer
DOI:10.1016/j.tetlet.2009.08.058
日期:2009.11
The viologen N,N'-dicyanomethyl-4,4'-bipyridinium center dot 2PF(6) was found to induce an aza-Diels-Alder reaction of N-arylimines with N-vinylpyrrolidinone or N-vinylcarbazole, producing tetrahydroquinoline derivatives with high cis/trans selectivities and yields. (C) 2009 Elsevier Ltd. All rights reserved.