通过使各种取代的3-芳基-1-(3-香豆基)丙烷反应,合成了一系列新的5-(取代)芳基-3-(3-香豆基)-1-苯基-2-吡唑啉(3a - l)。在热吡啶存在下与苯肼形成1-ones(2a – l)。根据元素分析和光谱数据(IR,1 H NMR和13 C NMR)对所有新合成化合物的结构进行表征。以12 mg制备的化合物中的化合物3d,e,i和j为原料,以200 mg / kg bw的剂量筛选标题化合物的体内抗炎和镇痛活性。在角叉菜胶诱导的大鼠水肿爪等急性炎症模型中显示出显着的抗炎活性,而在3D辅助佐剂诱发的关节炎等慢性炎症模型中,化合物3d和e显示出显着的活性,并与双氯芬酸(13.5 mg / kg bw)进行了比较作为标准药物。还发现这些化合物在乙酸诱导的扭体模型中具有显着的镇痛活性,在酵母诱导的发热模型中具有最小的致溃疡指数,具有解热活性。
organometallic recyclable catalyst in the synthesis of coumarin–chalcone hybrids through the Claisen–Schmidt condensation of different aromatic aldehydes and 3-acetyl coumarin. The nanocomposite increased the rate and facility of the aforementioned reaction and represented a strong influence in the green synthesis of different coumarin–chalcone derivatives. The nanocatalyst has been characterized by N2 adsorption–desorption
摘要 固定在石墨化碳氮化物(ZnS NPs / gC 3 N 4)纳米复合材料上的氧化锌纳米颗粒通过有机碳可循环利用催化剂,通过不同芳族醛和3-乙酰香豆素的Claisen-Schmidt缩合反应合成香豆素-查尔酮杂化物。纳米复合材料提高了上述反应的速率和便利性,并且在不同香豆素-查尔酮衍生物的绿色合成中表现出强大的影响力。纳米催化剂的特征在于N 2吸附-解吸,傅立叶变换红外光谱,扫描电子显微镜,粉末X射线衍射和能量色散光谱。这种新颖且可持续的方法的优点是香豆素-查尔酮化合物的收率高,反应时间短,对环境无害,ZnS NPs / gC 3 N 4的可回收性以及可重用性,而不会显着降低催化活性。 图形概要
Bismuth triflate: A highly efficient catalyst for the synthesis of bio-active coumarin compounds via one-pot multi-component reaction
作者:Mahmoud. Abd El Aleem. Ali. Ali. El-Remaily
DOI:10.1016/s1872-2067(14)60308-9
日期:2015.7
A series of coumarin-chalcone hybrid compounds and coumarins linked to pyrazoline was synthesized in good yield and short time using a simple and efficient method. This method involved the one-pot reaction of salicylaldehyde, an alpha-ketoester and an aromatic aldehyde (in the case of the coumarin-chalcone derivatives) in addition to hydrazine hydrate (in the case of the pyrazolyl coumarins) in the presence of a catalytic amount of bismuth triflate [Bi(OTf)(3), 5 mol%]. The synthesized compounds showed scavenging activity towards the free radical 2,2-diphenyl-1-picrylhydrazyl. All compounds were characterized using IR, H-1 NMR and C-13 NMR spectroscopy. (C) 2015, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
Cu(II) and Ni(II) complexes of coumarin derivatives with fourth generation flouroquinolone: synthesis, characterization, microbicidal and antioxidant assay