نتایج جستجو برای: Quinolines

تعداد نتایج: 1740  

2014
Alison E. Wendlandt Shannon S. Stahl

Quinolines are common pharmacophores present in numerous FDA-approved pharmaceuticals and other bioactive compounds. Here, we report the design and development of new o-quinone-based catalysts for the oxidative dehydrogenation of tetrahydroquinolines to afford quinolines. Use of a Co(salophen) cocatalyst allows the reaction to proceed efficiently with ambient air at room temperature. The utilit...

Journal: :Molecules 2012
Chintakunta Ramesh Po-Min Lei Veerababurao Kavala Chun-Wei Kuo Ching-Fa Yao

A convenient one-pot preparation of 2-methyl-3-(phenylthiomethyl)quinolines from Morita-Baylis-Hillman adducts via conjugate addition of thiols followed by reductive cyclization with Fe/AcOH was developed. The 2-methyl-3-(phenylthiomethyl)quinolines were transformed into 2-methyl-3-(phenylsulfonylmethyl)quinolines via m-CPBA-mediated oxidation.

Journal: :Organic & biomolecular chemistry 2013
Jun-ya Kato Hiroshi Aoyama Tsutomu Yokomatsu

A novel method for the synthesis of pyrazolo[1,5-a]quinolines under the transition-metal-free conditions has been developed. This method involves a novel combination of aromatic nucleophilic substitution and Knoevenagel condensation reactions to give pyrazolo[1,5-a]quinolines.

Journal: :Chemical & pharmaceutical bulletin 2008
Biswanath Das Martha Krishnaiah Keetha Laxminarayana Duddukuri Nandankumar

Silica supported phosphomolybdic acid, an eco-friendly heterogeneous catalyst, has been found to be highly efficient for Friedlander synthesis of quinolines in excellent yields. A variety of ketones afford the quinolines smoothly. The catalyst can be easily recovered and reused.

Journal: :Antimicrobial agents and chemotherapy 2005
Hector Nakayama Philippe M Loiseau Christian Bories Susana Torres de Ortiz Alicia Schinini Elsa Serna Antonieta Rojas de Arias Mohamed A Fakhfakh Xavier Franck Bruno Figadère Reynald Hocquemiller Alain Fournet

We report in this study the in vivo efficacy of nine 2-substituted quinolines on the Leishmania amazonensis cutaneous infection murine model and on the Leishmania infantum and Leishmania donovani visceral infection murine models. In the case of the L. amazonensis model, quinolines were administered orally at 25 mg/kg twice daily for 15 days. Quinolines 1, 2, 3, and 7 reduced by 80 to 90% the pa...

Journal: :Organic & biomolecular chemistry 2012
Belén Abarca Rosa Adam Rafael Ballesteros

A Pd/C/Zn mixture with alcohols has been revealed to be an efficient transfer hydrogenation system to quinolines. Furthermore, the metals mixture is able to activate alcohols as N-alkylating agents in a hydrogen autotransfer process. 1,2,3,4-Tetrahydroquinolines and N-alkylated tetrahydroquinolines from quinolines have been obtained with excellent yields in one step.

Journal: :The Journal of organic chemistry 2003
Josemon Jacob William D Jones

A variety of diallylanilines are shown to undergo cobalt-carbonyl catalyzed rearrangement to quinolines. Diallylanilines are also used as allyl transfer reagents to convert benzaldimines into quinolines. Substitution in the 2- and 3-positions of the quinoline is featured in all transformations.

Journal: :Organic & biomolecular chemistry 2011
Yuanxiang Wang Jing Ai Gang Liu Meiyu Geng Ao Zhang

An effective one-pot synthesis of quinolines bearing diverse C3-piperazinyl functions was developed by using a modified Friedländer's protocol. The method not only enables the synthesis of our early reported c-Met inhibitor on a large scale, but also provides a way to generate novel multi-substituted quinolines for further structure-activity relationship (SAR) study.

Journal: :Organic & biomolecular chemistry 2017
Jin Yuan Jin-Tao Yu Yan Jiang Jiang Cheng

A palladium-catalyzed annulation of ortho-vinylanilines with dimethyl sulfoxide was developed to access 4-aryl quinolines in moderate to good yields. Activated by 1,4-diazabicyclo[2.2.2]octane bis(sulfur dioxide) adduct (DABSO), DMSO served as a "[double bond, length as m-dash]CH-" fragment in this transformation. It represents a facile pathway leading to 4-aryl quinolines.

Journal: :Chemical communications 2015
Ryoichi Kuwano Ryuhei Ikeda Kazuki Hirasada

The reduction of quinolines selectively took place on their carbocyclic rings to give 5,6,7,8-tetrahydroquinolines, when the hydrogenation was conducted in the presence of a Ru(η(3)-methallyl)2(cod)-PhTRAP catalyst. The chiral ruthenium catalyst converted 8-substituted quinolines into chiral 5,6,7,8-tetrahydroquinolines with up to 91 : 9 er.

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