Heterogeneous copper-catalyzed three-component reaction of 2-aminopyridines, acetophenones and benzyl cyanide towards 3-cyanoimidazo[1,2-a]pyridines
作者:Bingbo Niu、Chongren You、Bin Huang、Mingzhong Cai
DOI:10.1016/j.catcom.2019.01.025
日期:2019.4
The heterogeneous three-componentreaction of 2-aminopyridines, acetophenones and benzyl cyanide was achieved in NMP at 120 °C by using an MCM-41-anchored L-proline‑copper(I) complex [MCM-41-L-Proline-CuI] as catalyst under air, yielding a wide variety of 3-cyanoimidazo[1,2-a]pyridines in moderate to high yields. The new heterogeneous copper catalyst exhibited higher catalytic activity than CuI, and
的2-氨基吡啶,苯乙酮和苄基氰的非均相三组分反应在NMP中在120℃下通过使用MCM-41锚定实现大号-脯氨酸-铜(I)配合物[MCM-41-大号-脯氨酸翠在空气中作为催化剂,以中等至高收率产生了多种3-氰基咪唑并[1,2- a ]吡啶。新的非均相铜催化剂显示出比CuI更高的催化活性,并且可以以几乎恒定的活性循环至少八次。
Copper-mediated three-component synthesis of 3-cyanoimidazo[1,2-a]pyridines
作者:Qiaodong Wen、Ping Lu、Yanguang Wang
DOI:10.1039/c5cc05821j
日期:——
A copper-mediated three-component approach towards the synthesis of 3-cyanoimidazo[1,2-a]pyridines from 2-aminopyridines, acetophenones and benzyl cyanide was developed. This cascade reaction proceeds through a copper-mediated oxidative release of cyanide from benzyl cyanide, a copper-mediated Ortoleva–King reaction, and a copper-catalyzed cyanation.