Synthesis of 4-Amino-3-quinolinesulfonic Acids and 4-Aminoquinolines
摘要:
The hydrolysis of 4-chloro-3-quinolinesulfonyl chloride (1) gives 4-chloro-3-quinolinesulfonic acid (2) or 1,4-dihydro-4-oxo-3-quinolinesulfonic acid (3). Compound (2) reacts with primary and secondary aliphatic or primary aromatic amines to give 4-amino-3-quinolinesulfonic acids (4). Desulfonation of quinolinesulfonic acids (2,3,4) yields 4(1H)-quinolinone or 4-aminoquinolines (5).
A Convenient Synthesis of Nitrogen-Containing Heterocycles Bearing Amino Substituents from Heteroaryl Triflates
作者:Sandro Cacchi、Antonella Carangio、Giancarlo Fabrizi、Leonardo Moro、Paola Pace
DOI:10.1055/s-1997-1041
日期:——
Nitrogen-containing heterocycles bearing amino substituents were prepared by the reaction of the corresponding nitrogen-containing heteroaryl triflates with amines. The reaction affords good results with primary and secondary amines, and with aliphatic and aromatic amines. The whole triflation/amination process can also be conducted as a one-pot operation.
Product selective reaction controlled by the combination of palladium nanoparticles, continuous microwave irradiation, and a co-existing solid; ligand-free Buchwald–Hartwig amination <i>vs.</i> aryne amination
metal solid. In this methodology, a microwave-controlled product selectivity was achieved between Buchwald–Hartwig amination and aryne amination performed under strongly basic conditions and at a high reaction temperature, because a polar chemical species such as Ar–Pd–halogen might be activated selectively by microwave radiation. Moreover, our catalyst could be used repeatedly over 10 times, and the amount
QUINOLINE DERIVATIVES USEFUL IN THE TREATMENT OF MGLUR5 RECEPTOR-MEDIATED DISORDERS
申请人:Keseru Gyorgy
公开号:US20090270371A1
公开(公告)日:2009-10-29
Compounds of formula (I): and/or enantiomers and/or racemates and/or diastereomers and/or pharmaceutically acceptable salts thereof formed with acids or bases, to the process for their preparation, to the intermediates of the preparation process, to the pharmaceutical formulations containing these compounds and to their use in the prevention and/or treatment of mGluR5 receptor-mediated disorders.
Aerobic Dehydrogenative Aromatization in the Preparation of 4-Aminoquinoline Derivatives by Synergistic Pd/Cu Catalysis
作者:Fei Chen、Huidan Geng、Chun Li、Jianta Wang、Bing Guo、Lei Tang、Yuan-Yong Yang
DOI:10.1021/acs.joc.3c01400
日期:2023.11.17
The 4-aminoquinoline moiety is widely present in various bioactive compounds and marketed drugs, while the preparation of this target structure relies heavily on the amination of 4-chloroquinolines. Herein, an atom and step economic procedure was developed based on an aerobic dehydrogenative aromatization strategy. Unlike the well-known palladium-catalyzed dehydrogenative aromatization of cyclohexanones
4-氨基喹啉部分广泛存在于各种生物活性化合物和市售药物中,而该目标结构的制备很大程度上依赖于4-氯喹啉的胺化。在此,基于有氧脱氢芳构化策略开发了原子和步骤经济程序。与众所周知的钯催化环己酮与胺的脱氢芳构化不同,协同 Pd/Cu 催化对于 2,3-二氢喹啉-4(1 H )-one 类型的底物至关重要。在优化条件下,一系列芳香族/脂肪族胺和2,3-二氢喹啉-4(1H ) -酮偶联,以中等到高收率得到相应的4-氨基喹啉产物,并应用当前的方法还展示了上市药物的制备和后期多样化。
Rh(NHC)-Catalyzed Direct and Selective Arylation of Quinolines at the 8-Position
作者:Jaesung Kwak、Min Kim、Sukbok Chang
DOI:10.1021/ja111670s
日期:2011.3.23
A new catalytic protocol for the regioselective direct arylation of quinoline derivatives at the 8-position has been developed. The reaction is catalyzed by a Rh(NHC) system, and the choice of the NHC ligand was most important for achieving high reactivity and selectivity.