Molecular iodine-catalyzed and air-mediated tandem synthesis of quinolines via three-component reaction of amines, aldehydes, and alkynes
作者:Xuejian Li、Zhenjun Mao、Yanguang Wang、Weixiang Chen、Xufeng Lin
DOI:10.1016/j.tet.2011.03.087
日期:2011.5
A one-pot synthesis of quinolines via molecular iodine-catalyzed and air-mediated tandem condensation/imino-Diels–Alder/isomerization/oxidation of simple readily available amines, aldehydes, and alkynes has been developed. This methodology was extended to synthesize quinazolines from two molecules of amines and two molecules of glyoxalates.
<scp>Metal‐Free</scp>
Synthesis of Benzo[
<i>a</i>
]phenanthridines from Aromatic Aldehydes, Cyclohexanones, and Aromatic Amines
作者:Pingyu Jiang、Zhifei Shan、Shanping Chen、Quanyuan Wang、Shuxin Jiang、Haolin Zheng、Guo‐Jun Deng
DOI:10.1002/cjoc.202100670
日期:2022.2
A three-component synthesis of benzo[α]phenanthridines from aromaticaldehydes, cyclohexanones, and aromatic amines has been developed, which is mediated by KI/DMSO/camphorsulfonic acid to afford a variety of functionalized benzo[α]phenanthridines in satisfactory yields. The present strategy provides a biaryl motif ortho to the nitrogen atom which has the potential to be used as ligand by further modification
Regioselective synthesis of benzo[g]- and benzo[f]quinolines by reaction of chalcones with naphthalen-2-amine
作者:V. D. Pak、Ya. V. Bykov、N. N. Yaganova、A. A. Gorbunov、V. A. Glushkov、M. V. Dmitriev、P. A. Slepukhin
DOI:10.1134/s1070428017040108
日期:2017.4
Reactions of 4- and 4′-substituted chalcones with naphthalen-2-amine afforded isomeric benzo[g]- and benzo[f]quinoline derivatives. Depending on the substituent in the initial chalcone, the cyclization follows two pathways through different intermediates. The product structure was confirmed by IR, 1H and 13C NMR, and massspectra and X-ray analysis.
4-和4'-取代的查耳酮与萘-2-胺的反应得到异构体苯并[ g ]-和苯并[ f ]喹啉衍生物。取决于初始查尔酮中的取代基,环化遵循通过不同中间体的两条途径。通过IR,1 H和13 C NMR,质谱和X射线分析确认产物结构。
One-Pot Synthesis of 2-Arylquinolines via in situ Acid Catalysis
A simple, efficient, and practical protocol is reported, allowing quick access to diverse 2-arylquinolines from 2-vinylanilines and benzyl halides. This reaction is additive and metal catalyst-free with only solvent needed. A preliminary mechanistic investigation discloses the driving force comes from the in situ released HBr, which catalyzes the subsequent cyclization. The present synthetic route