摘要一系列新的半三明治(η6-对-cymene)钌(II)与噻吩-2-羧酸酰肼衍生物[Ru(η6-对-cymene)(Cl)(L)] [L = N' -(萘-1-基亚甲基)噻吩-2-碳酰肼(L1),N'-(蒽-9-基亚甲基)噻吩-2-碳酰肼(L2)和N'-(吡喃-1-基亚甲基)噻吩-2-合成了碳酰肼(L3)]。通过光谱(IR,UV-Vis,NMR和质谱)和元素分析对配体前体及其Ru(II)配合物(1-3)进行结构表征。钌(II)配合物1-3的分子结构通过单晶X射线衍射测定。所有配合物均用作催化剂,用于一锅三组分合成2,4,5-三取代的咪唑和5-取代的1H-四唑衍生物。催化研究优化了溶剂,温度和催化剂等参数。所述催化剂显示出对具有电子吸引子或电子给体取代基的广泛范围的芳族醛非常有效,并且尽管活性较低,但对于烷基醛观察到中等至高的活性。
Iron nanotube-silica composite (ZVI-S-PCAT modified silica composite) preparation, characterization and application as a recyclable catalytic system for 5-membered ring organic transformations
The ZVI-S-PCAT modified silica composite is a successful catalytic framework for synthesizing 5-membered heterocylic rings and a future sensor material.
A sustainable approach towards the three-component synthesis of unsubstituted 1<i>H-</i>imidazoles in the water at ambient conditions
作者:Suraj S. Kapale、Hemchandra K. Chaudhari、Suraj N. Mali、Balaram S. Takale、Hitesh Pawar
DOI:10.1080/10286020.2020.1760852
日期:2021.7.3
A green protocol for the synthesis of unsubstituted imidazoles has been demonstrated herein. The reaction is realized using commercially available lipase enzyme, porcine pancreas lipase (PPL) in water. The reaction conditions are selective and mild which helped to tolerate a wide variety of functional groups to give the desired products in good chemical yields.[GRAPHICS].