摘要 三取代的喹啉和酰腙意外地由 N'-((2-氨基苯基)(苯基)亚甲基)苯甲酰肼与炔酸酯的反应制备。使用N'-((2-氨基苯基)(苯基)亚甲基)苯甲酰肼不仅获得了喹啉,而且获得了第二个医药重要产品酰腙。值得注意的是,优异的收率、操作简单、反应时间短以及避免使用催化剂使这种方法成为生产喹啉-2,3-二羧酸盐的一种有吸引力的补充方法。5a 的晶体结构是使用单晶 X 射线晶体学确定的。结果表明,5a 的晶体堆积图是两对分子的晶体堆积图,它们在两个垂直分子之间具有两个独立的交替分子间一维聚合物 H 键。图形概要
methylenes/α‐oxoketene dithioacetals promoted by InCl3 in refluxing acetonitrile as well as under solvent‐free conditions in excellent yields. This transformation presumably proceeded through the hydroamination–hydroarylation of alkynes, and the Friedländer annulation of active methylene compounds and α‐oxoketene dithioacetals with 2‐aminoarylketones. In addition, simple reductive and oxidative cyclization of 2‐nitrobenzaldehyde
A simple synthesis of trisubstituted quinolines through transesterification
作者:Dipti R. Patil、Madhukar B. Deshmukh、Sonali M. Salunkhe、Prashant V. Anbhule
DOI:10.1002/jhet.711
日期:2011.11
An efficient and simple method has been reported for the synthesis of 2,3,4‐trisubstitutedquinolinesthrough zwitterion intermediate under reflux condition in presence of sulfuric acid. The formed dicarboxylate subsequently undergoes transesterification in various alcohols with good yields. Most of the synthesized compounds are newly reported characterized by spectroscopic method. J. Heterocyclic
Copper triflate catalyzed annulation of 2-aminoaryl ketones with internal alkynes has been developed for the synthesis of polysubstituted quinolines in high yields under solvent-free conditions. Phenyl propiolic acid afforded the 3-unsubstituted quinolines via decarboxylation. The protocol is compatible with various internal alkynes and is expected to find wide applications due to its operational simplicity.
An efficient synthesis of 2,3,4-trisubstituted quinolines through alkynylation-cyclization at ambient temperature
作者:Dipti R. Patil、Sonali M. Salunkhe、Madhukar B. Deshmukh、Prashant V. Anbhule
DOI:10.1002/jhet.715
日期:2011.11
A series of 2,3,4‐trisubstitutedquinoline derivatives have been synthesized by reactions between 2‐aminoaryl ketones and dialkyl acetylenedicarboxylate. The synthetic pathway allows for the direct construction of said quinoline derivatives in pyridine/ethanol at ambient temperature through a zwitterion intermediate. J. Heterocyclic Chem., (2011)
A mild and efficient protocol for synthesis of quinoline derivatives in aqueousmedium under neutral conditions is described. The reaction proceeded smoothly in H2O catalyzed by supramolecular catalyst β‐CD. By this protocol, various quinoline derivatives were synthesized in excellent yields.