Synthesis of 4-methyl-2,3-disubstituted quinoline scaffolds via environmentally benign Fe(iii) catalysed sequential condensation, cyclization and aromatization of 1,3-diketone and 2-ethynylaniline
Efficient and Rapid Friedlander Synthesis of Functionalized Quinolines Catalyzed by Neodymium(III) Nitrate Hexahydrate
作者:Srinivas Adapa、Ravi Varala、Ramu Enugala
DOI:10.1055/s-2006-950296
日期:2006.11
Friedlander synthesis of quinolines catalyzed by neodymium nitrate [Nd(NO 3 ) 3 ·6H 2 O, 5 mol%] in ethanol at room temperature was achieved in moderate to excellent yields (62-94%).
Sulfated Polyborate Catalyzed Selective Friedlander Annulation for Synthesis of Highly Functionalized Quinolines
作者:Anil S. Mali、Abhishek B. Sharma、Ganesh U. Chaturbhuj
DOI:10.1080/00304948.2020.1762457
日期:2020.7.3
The quinoline moiety is a privileged scaffold because of the wide spectrum of its biological activities. 1 , 2 Along with the Friedlander annulation, other procedures developed for the synthesis of...
Rapid and efficient synthesis of poly-substituted quinolines assisted by p-toluene sulphonic acid under solvent-free conditions: comparative study of microwave irradiation versus conventional heating
作者:Cheng-Sheng Jia、Ze Zhang、Shu-Jiang Tu、Guan-Wu Wang
DOI:10.1039/b513721g
日期:——
A rapid and efficient method for the preparation of various poly-substituted quinolines has been developed through the Friedlander condensation of 2-aminoarylketone or 2-aminoarylaldehyde with carbonyl compounds in the presence of p-toluene sulphonic acid, which was achieved by both microwaveirradiation and conventional heating under solvent-free conditions.
3-methyl-1-sulfoimidazolium trichloroacetate ([Msim][OOCCCl3]) and 3-methyl-1-sulfoimidazolium chloride ([Msim]Cl) were efficiently utilized as recyclable acidic homogeneous medium for the Friedländersynthesis of quinolines at 100 °C. The reaction completed with single product formation in short time and involved simple isolation of product with 95–100 % yields. The novel ionic liquids [Msim][OOCCCl3] and
A general procedure for the synthesis of quinolines via the Friedlander annulation using 2,4,6-trichloro-1,3,5-triazine (TCT) (4 mol %) as a novel catalyst is described. The method is simple, efficient, and rapid to afford quinolines in high yields.