A New Flow Methodology for the Expedient Synthesis of Drug‐Like 3‐Aminoindolizines
作者:Paul P. Lange、Andrew R. Bogdan、Keith James
DOI:10.1002/adsc.201200316
日期:2012.9.17
A flow‐based synthesis of diversely functionalized indolizines and their aza‐analogues is described. These drug‐like heterocycles were generated via a tandem Sonogashira/cycloisomerization sequence, starting from widely available 2‐bromopyridines and alkynes, employing a simple catalyst system together with 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU) as base. The use of flow technology allows a straightforward
Synthesis of Substituted 3-Indolylimines and Indole-3-carboxaldehydes by Rhodium(II)-Catalyzed Annulation
作者:Basker Rajagopal、Chih-Hung Chou、Ching-Cheng Chung、Po-Chiao Lin
DOI:10.1021/ol501618z
日期:2014.7.18
3-indolylimines from N-propargylanilines through Rh(II)-catalyzed denitrogenative annulation of N-sulfonyl-1,2,3-triazoles. Further combined with hydrolysis or reduction, a one-pot method is developed to enable the direct incorporation of an imine, aldehyde, or amine group into an indole system from an alkyne. A variety of substituted 3-indolylimines, indole-3-carboxaldehydes, and 3-Indolylmethanamines are
Synthesis of 2-Indolyltetrahydroquinolines by Zinc(II)-Catalyzed Intramolecular Hydroarylation-Redox Cross-Dehydrogenative Coupling of <i>N</i>
-Propargylanilines with Indoles
作者:Guangzhe Li、Hiroyuki Nakamura
DOI:10.1002/anie.201602416
日期:2016.6.1
An intramolecular hydroarylation‐redox cross‐dehydrogenativecoupling (CDC) of propargylic anilines with indoles proceeded in the presence of zinc(II) catalysts to give 2‐indolyltetrahydroquinolines in good to high yields. Three C−H bonds (two sp2 and one sp3) are activated in one shot and these hydrogen atoms are trapped by a propargylic triple bond in the molecule.
Zinc(<scp>ii</scp>)-catalyzed intramolecular hydroarylation-redox cross-dehydrogenative coupling of<i>N</i>-propargylanilines with diverse carbon pronucleophiles: facile access to functionalized tetrahydroquinolines
Redox cross-dehydrogenative coupling ofN-propargylanilines with diverse carbon pronucleophiles offers a general and efficient synthetic method to construct functionalized tetrahydroquinolines.
Synthesis and Photophysical Characterization of 2,3-Dihydroquinolin-4-imines: New Fluorophores with Color-Tailored Emission
作者:Chih-Hung Chou、Basker Rajagopal、Chien-Fu Liang、Kuan-Lin Chen、Dun-Yuan Jin、Hsing-Yin Chen、Hsiu-Chung Tu、Yu-Ying Shen、Po-Chiao Lin
DOI:10.1002/chem.201703998
日期:2018.1.24
In this study, a series of variouslysubstituted 2,3‐dihydroquinolin‐4‐imines (DQIs) were synthesized from N‐substituted propargylanilines by copper(I)‐catalyzed annulation. The approach adopted in this study under mild, effective conditions exhibited broad substrate tolerance, particularly for functional groups substituted on anilines. Most of the DQI derivatives synthesized under optimal conditions