Microwave-promoted one-pot three-component synthesis of 2,3-dihydroquinazolin-4(1H)-ones catalyzed by heteropolyanion-based ionic liquids under solvent-free conditions
3-dihydroquinazoline-4(1H)-one derivatives have been synthesized via one-pot three-component reaction using isatoic anhydrides, amines and aldehydes (or ketones) catalyzed by heteropolyanion-based ionic liquids under microwave-promoted conditions. The practical protocol was found to tolerate a wide range of substrates with different functional groups. Moderate to excellent yields, solvent-free media and operational
interactions towards chlorocuprates(I), affect the coordination environment of copper species and the particle size in the generated structures. All resulted microscopic data of [choline]+[CuCl2]−, [N-benzyl DABCO]+[Cu4Cl5]−, [N-benzyl nicotine]+[Cu4Cl5]− and [choline]+[Cu3Cl4]− showed the formation of nano-meter particles in the matrix of these materials. The new chlorocuprate(I) derived from choline chloride
有趣的有机-无机铜基纳米结构对应于[阳离子] + [C u n C l n +1 ] -通过含有配位中心的氯化物离子液体与CuCl反应成功制备。阴离子部分的“n”值 [Cu n Cl n+1 ] -被观察到依赖于所用离子液体中的阳离子的性质,在该离子液体中发生共沉淀。离子液体含有N位或OH官能团等官能团,可与氯铜酸盐(I)形成配位和静电相互作用,影响铜物种的配位环境和生成结构中的粒径。[胆碱] + [C u C l 2 ] - , [N-苄基 DABCO] + [C u 4 C l 5 ] - , [N-苄基尼古丁] + [ C u 4 C l 5的所有结果显微数据] -和[胆碱] + [C u 3 C l 4 ] -表明在这些材料的基质中形成了纳米颗粒。由氯化胆碱 [choline] + [C u 3 C l 4 ] -衍生的新氯铜酸盐 (I)通过元素分析、FESEM、TEM、ICP 和质谱
Corrigendum to “Microwave-promoted one-pot three-component synthesis of 2,3-dihydroquinazolin-4(1H)-ones catalyzed by heteropolyanion-based ionic liquids under solvent-free conditions” [Tetrahedron Lett. 76/27 (2020) 131312]
Synthesis of 2,3-Dihydroquinazolin-4(1<i>H</i>)-ones by Three-Component Coupling of Isatoic Anhydride, Amines, and Aldehydes Catalyzed by Magnetic Fe<sub>3</sub>O<sub>4</sub> Nanoparticles in Water
A simple and efficient protocol for one-pot three-component coupling of isatoic anhydride, amines, and aldehydes in water using magnetically recoverable Fe3O4 nanoparticles is reported. This methodology results in the synthesis of a variety of 2,3-dihydroquinazolin-4(1H)-ones in high yields. The catalyst can be recovered and recycled without a significant loss in the catalytic activity.
Nano-indium oxide: An efficient catalyst for one-pot synthesis of 2,3-dihydroquinazolin-4(1H)-ones with a greener prospect
Nano-In2O3 is found to be a remarkable efficient catalyst for the one-pot three-component condensation of isatoic anhydride, primary amine or ammonium salts and aromatic aldehydes for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones in aqueous media. In2O3 nanoparticles are easily recyclable without the significant loss of catalytic activities. (C) 2014 Elsevier B.V. All rights reserved.