In water organic synthesis: Introducing itaconic acid as a recyclable acidic promoter for efficient and scalable synthesis of quinoxaline derivatives at room temperature
作者:Kashyap J. Tamuli、Shyamalendu Nath、Manobjyoti Bordoloi
DOI:10.1002/jhet.4231
日期:2021.4
Substituted quinoxalinederivatives are traditionally synthesized by co‐condensation of various starting materials. Herein, we describe a novel environmentally benign in water synthetic route for the synthesis of structurally and electronically diverse ninety quinoxalines with readily available substituted o‐phenylenediamine and 1,2‐diketones using cheap and biodegradable itaconic acid as a mild acid
Sodium Bromate/Sodium Hydrogen Sulfite: A New Catalyst for the Synthesis of Quinoxaline Derivatives
作者:Khalid M. Khan、Shafqat Hussain、Shahanaz Perveen、Fazal Rahim、Sammer Yousuf、Ejaz Hussain
DOI:10.2174/1570178611666140304000936
日期:2014.4
Treatment of 1,2-phenylenediamine with benzil analogs in the presence of a mixture of sodium bromate/
sodium hydrogen sulfite in water gave the corresponding quinoxalines in high yields. The method is eco-friendly due to
use of water instead of other hazardous organic solvents.
An efficient synthesis of quinoxaline derivatives mediated by stannous chloride
作者:Da-Qing Shi、Guo-Lan Dou、Sai-Nan Ni、Jing-Wen Shi、Xiao-Yue Li
DOI:10.1002/jhet.5570450637
日期:2008.11
important quinoxaline derivatives were efficiently synthesized in excellent yields by the reaction of 1,2-diketones and 2-nitroaniline, benzofuroxan or 1,2-dinitrobenzene promoted by SnCl22H2O. The role of stannous chloride is acting as both reductive agent and catalyst in this synthesis. This new method has the advantages of accessible starting materials, convenient manipulation, short reaction time
COMPOSITIONS FOR TREATING OR PREVENTING OBESITY AND INSULIN RESISTANCE DISORDERS
申请人:Sinclair David A.
公开号:US20120029065A1
公开(公告)日:2012-02-02
Provided herein are methods and compositions for modulating the activity or level of a sirtuin, thereby treating or preventing obesity or an insulin resistance disorder, such as diabetes in a subject. Exemplary methods comprise contacting a cell with a sirtuin activating compound or an inhibitory compound to thereby increase or decrease fat accumulation, respectively.
Compositions for manipulating the lifespan and stress response of cells and organisms
申请人:President and Fellows of Harvard College
公开号:EP2236131A2
公开(公告)日:2010-10-06
Provided herein are methods and compositions for modulating the activity of sirtuin deacetylase protein family members; p53 activity; apoptosis; lifespan and sensitivity to stress of cells and organisms. Exemplary methods comprise contacting a cell with an activating compound, such as a flavone, stilbene, flavanone, isoflavone, catechin, chalcone, tannin or anthocyanidin; or an inhibitory compound, such as a sphingolipid, e.g., sphingosine.