Novel facile synthesis of 2,2,4 substituted 1,2-dihydroquinolines via a modified Skraup reaction
作者:Maria-Elena Theoclitou、Leslie A. Robinson
DOI:10.1016/s0040-4039(02)00614-7
日期:2002.5
A variety of 2,2,4 substituted 1,2-dihydroquinolines were synthesized from substituted anilines or aminoheterocycles and the corresponding ketones in good yield via the use of lanthanide catalysts and microwave technology. This method can be readily applied to the general synthesis of combinatorial libraries of dihydroquinolines.
The catalytic enantioselective synthesis of tetrahydroquinolines containing all-carbon quaternary stereocenters via the formation of aza-ortho-xylylene with 1,2-dihydroquinoline as a precursor
Tetrahydroquinolines (THQs) with an all-carbon quaternary stereocenter were effectively obtained via the in situ formation of aza-ortho-xylylene (AOX) with easily accessible 1,2-dihydroquinolines as precursors.
An efficient process has been developed for the synthesis of 2,2,4-trisubstituted-1,2-dihydroquinolines in good yields through a simple one-pot condensation between anilines and ketones in the presence of zinctriflate as a catalyst at room temperature undersolvent-freeconditions.
Dynamic processes in N-acylated 1,2-dihydro-2,2,4-trimethylbenzo(h)quinoline: A comparative study by NMR spectroscopy and quantum chemistry
作者:Jaan Leis、Karel D. Klika、Kalevi Pihlaja、Mati Karelson
DOI:10.1016/s0040-4020(99)00168-4
日期:1999.4
The results of conformationalstudies on several N-acyl derivatives of 1,2-dihydro-2,2,4-trimethylbenzo(h)quinoline are reported. A comparativestudy by NMR spectroscopy and semiempirical quantum chemical modelling using the AM1 SCF method revealed that the nitrogen atom is pyramidal with a substantial out-of-plane torsion of the acyl group and that the molecules adopt the E conformation in the ground
Scope and Mechanistic Study of the Ruthenium-Catalyzed<i> ortho</i>-C−H Bond Activation and Cyclization Reactions of Arylamines with Terminal Alkynes
作者:Chae S. Yi、Sang Young Yun
DOI:10.1021/ja055608s
日期:2005.12.1
was found to be a highly effective catalyst for the C-H bond activation reaction of arylamines and terminalalkynes. The regioselective catalytic synthesis of substituted quinoline and quinoxaline derivatives was achieved from the ortho-C-H bond activation reaction of arylamines and terminalalkynes by using the catalyst Ru(3)(CO)(12)/HBF(4).OEt(2). The normal isotope effect (k(CH)/k(CD) = 2.5) was