An improved iron-mediated synthesis of N-2-aryl substituted 1,2,3-triazoles
作者:Ahmed Kamal、Ponnampalli Swapna
DOI:10.1039/c3ra22485f
日期:——
Treatment of various chalcones and sodium azide in the presence of catalytic amounts of commercially available iron oxide nanoparticles, followed by the addition of aryl halides afforded N-2-arylated 1,2,3-triazoles in very good yields. This tandem three-component reaction involves an oxidative 1,3-dipolar cycloaddition of the chalcone and azide and subsequent regioselective N-2-arylation. The nano-catalyst is easily recoverable and can be reused without any significant loss in catalytic activity.
[EN] COMPOSITION FOR TREATING DIABETES AND METABOLIC DISEASES AND A PREPARATION METHOD THEREOF<br/>[FR] COMPOSITION POUR LE TRAITEMENT DU DIABÈTE ET DE MALADIES MÉTABOLIQUES, ET SON PROCÉDÉ DE PRÉPARATION
申请人:UNIV KAOHSIUNG MEDICAL
公开号:WO2013022951A1
公开(公告)日:2013-02-14
Disclosed is a chalcone composition for treating diabetes and metabolic syndromes. In particular, the chalcone compound bound with 2-halogen in ring A significantly decreases the blood glucose level in the in vitro anti-diabetic effect experiment. In the in vivo animal model, the leading chalcone compound can prevent the progression of diabetes and control the blood glucose level, and there is no significant difference in the gains in body weight. Throughout the seven-week administration, there are no hepatic or renal toxicity observed.
Phase-Transfer-Catalyst-Mediated Domino Reaction of γ-Nitro Ketones with Chalcones: Approach to Functionalized Six-Membered-Ring Carbocycles
作者:Lu Yu、Qingjing Yang、Pengfei Li
DOI:10.1002/ejoc.201403075
日期:2014.11
Dominoreactions between γ-nitroketones and chalcones for the construction of functionalizedsix-membered-ringcarbocycles using a phase-transfer catalyst have been developed. In the presence of tetrabutylammonium iodide and potassium hydroxide, dominoreactions between γ-nitroketones and a series of chalcones proceeded smoothly to give the cyclic products in moderate to high yields with high di
COMPOSITION FOR TREATING DIABETES AND METABOLIC DISEASES AND A PREPARATION METHOD THEREOF
申请人:Wu Yang-Chang
公开号:US20140350304A1
公开(公告)日:2014-11-27
Disclosed is a chalcone composition for treating diabetes and metabolic syndromes. In particular, the chalcone compound bound with 2-halogen in ring A significantly decreases the blood glucose level in the in vitro anti-diabetic effect experiment. In the in vivo animal model, the leading chalcone compound can prevent the progression of diabetes and control the blood glucose level, and there is no significant difference in the gains in body weight. Throughout the seven-week administration, there are no hepatic or renal toxicity observed.
In the present study, using chalcone as a lead compound, a series of its derivatives (compounds 1-30) were designed and synthesised. Their activity of anti-pathogenic fungi of plants has been evaluated. It is found that these compounds have good antifungal activity against Sclerotinia sclerotiorum, Helminthosprium maydis, Botrytis cinerea, Rhizoctonia solani and Gibberella zeae. Among them, the inhibition of growth for compound 30 against S. sclerotiorum showed 89.9%, with the median effective concentrations (EC50) of 15.4gmL(-1). The inhibition of growth for compounds 28, 29 and 30 at a concentration of 100gmL(-1) against H. maydis is 90.3%, 90.7% and 91.1%, with EC50 of 15.1, 18.3 and 18.1gmL(-1), respectively.