An efficient and practical synthesis of functionalized pyridines via recyclable copper-catalyzed three-component tandem cyclization
作者:Chengkai Luo、Mingzhong Cai、Ruonan Zhao、Bin Huang
DOI:10.1080/00397911.2022.2156296
日期:2023.2.1
Abstract An efficient heterogeneous copper(I)-catalyzed three-component tandem cyclization of ketoxime acetates, aldehydes, and activated methylene compounds has been developed that proceeds smoothly in DMSO at 120 °C by using an 3-(2-aminoethylamino)propyl-modified MCM-41-bound copper(I) bromide [MCM-41-2N-CuBr] as the catalyst, delivering a variety of polysubstituted pyridines in good to high yields
摘要 通过使用 3-(2-氨基乙基氨基) 丙基修饰的 MCM,开发了一种高效的非均相铜 (I) 催化的酮肟乙酸酯、醛和活化的亚甲基化合物的三组分串联环化反应,该反应在 120 °C 的 DMSO 中顺利进行-41-结合的溴化铜 (I) [MCM-41-2N-CuBr] 作为催化剂,以良好到高产率提供各种多取代吡啶。多相铜 (I) 催化剂可以很容易地通过简单的制备过程从市售的廉价试剂中获得,并且可以重复使用七次以上,而其催化效率没有任何明显下降。