In this work, the addition of 2-methylazaarenes benzylic sp(3) C-H to electron-deficient olefins, catalyzed by pepsin from pig gastric mucosa was reported. A series of azaarene derivatives (1 mmol) were obtained in good yields at 60 degrees C for 60 similar to 72 h with 20 mg pepsin as catalyst. This is a facile method and the reaction conditions are mild, which expands the application of biocatalysis in sp(3) C-H functionalization of azaarenes.
Chitosan-SO3H is found to catalyze the Friedländer condensation/annulation reaction of 2-aminoaryl ketones with α-methyleneketones to produce the corresponding quinolinederivatives in high yields in short reaction times. The use of recyclable and biodegradable chitosan-SO3H makes this method quite simple, more convenient, and economically viable compared to acid catalyzed methods reported in the literature
Synthesis of 4-methyl-2,3-disubstituted quinoline scaffolds via environmentally benign Fe(<scp>iii</scp>) catalysed sequential condensation, cyclization and aromatization of 1,3-diketone and 2-ethynylaniline
作者:Mahalingam Sivaraman、Paramasivan T. Perumal
DOI:10.1039/c4ra03666b
日期:——
Environmentally benign Fe(III)-catalysed sequential condensation, cyclization and aromatization of 1,3-diketone and 2-ethynylaniline derivatives to the substituted quinoline scaffolds with good to excellent yield in shorter reaction time is described.
(Bromodimethyl)sulfonium Bromide Catalyzed Solvent-Free Friedlander Synthesis of Substituted Quinolines
作者:R. Venkatesham、A. Manjula、B. Vittal Rao
DOI:10.1002/jhet.873
日期:2012.7
A simple and efficient (bromodimethyl)sulfoniumbromidecatalyzedsynthesis of quinolines, by condensation of α‐amino carbonyl, that is, 2‐aminobenzophenone and 2‐aminoacetophenone with α‐methylene containing carbonyl like 1,3‐dicarbonyls has been developed. The reaction is versatile, solvent‐free protocol for generation of structurally diverse quinolines.
An Efficient and Green Microwave-Assisted Synthesis of Quinoline Derivatives<i>via</i>Knoevengal Condensation
作者:Syed Tasqeeruddin、Yahya Asiri、Jaber Abdullah Alsherhri
DOI:10.2174/1570178616666190618153721
日期:2020.1.7
We have developed an efficient and green synthesis of quinoline derivatives using L-proline under Knoevenagel condensation. L-proline was found to be an efficient catalyst for the Knoevenagel condensation of substituted 2-aminoaryl ketones 1 with the active methylene compounds 2, affording quinolone derivatives 3. The reaction has been done under conventional as well as under microwave conditions.
A Simple, Efficient and Solvent-Free Protocol for the Friedländer Synthesis of Quinolines by Using SnCl<sub>2</sub>·2H<sub>2</sub>O
作者:Pandurangan Arumugam、Ganesan Karthikeyan、Raji Atchudan、D. Muralidharan、Paramasivan T. Perumal
DOI:10.1246/cl.2005.314
日期:2005.3
A variety of polysubstituted quinolines have been synthesized under solvent free condition by using tin(II) chloride·dihydrate. The reaction proceeds smoothly at room temperature in short reaction time. The yields and purity are excellent.