CuI-catalyzed Sonogashira reaction for the efficient synthesis of 1 H -imidazo[2,1- a ]isoquinoline derivatives
作者:Ma-Yong Gang、Jian-Quan Liu、Xiang-Shan Wang
DOI:10.1016/j.tet.2017.06.043
日期:2017.8
reaction first, and then intra-molecular hydroamination of alkyne catalyzed by CuI/o-phen was proved to be an efficient method for the synthesis of imidazo[2,1-a]isoquinoline, phenanthro[9′,10′:4,5]imidazo[2,1-a]isoquinoline and acenaphtho[1′,2′:4,5]imidazo [2,1-a]isoquinoline derivatives in the presence of Cs2CO3.
实验证明,先进行Sonogashira反应,然后再用CuI / o -phen催化炔烃分子内加氢胺化反应是合成咪唑并[2,1- a ]异喹啉,菲咯啉[9',10':4]的有效方法。在Cs 2 CO 3存在下,, 5]咪唑并[2,1- a ]异喹啉和[1',2':4,5]咪唑并[2,1- a ]异喹啉衍生物。
Tandem Palladium/Copper-Catalyzed Decarboxylative Approach to Benzoimidazo- and Imidazophenanthridine Skeletons
作者:Xin Geng、Andrey Shatskiy、Gregory R. Alvey、Jian-Quan Liu、Markus D. Kärkäs、Xiang-Shan Wang
DOI:10.1021/acs.orglett.2c03647
日期:2022.12.23
A protocol for a tandem Pd/Cu-catalyzed intermolecular cross-coupling cascade between o-bromobenzoic acids and 2-(2-bromoaryl)-1H-benzo[d]imidazoles or the corresponding imidazoles is presented. The protocol provides conceptually novel and controlled access to synthetically useful N-fused (benzo)imidazophenanthridine scaffolds with high efficiency, a broad substrate scope, and excellent functional
介绍了邻溴苯甲酸和 2-(2-溴芳基)-1 H-苯并 [ d ] 咪唑或相应咪唑之间串联 Pd/Cu 催化分子间交叉偶联级联的方案。该协议提供了概念上新颖且可控的途径,可用于合成有用的N-融合(苯并)咪唑并菲啶支架,具有高效率、广泛的底物范围和出色的官能团相容性。
Copper-Catalyzed Consecutive Ullmann, Decarboxylation, Oxidation, and Dehydration Reaction for Synthesis of Pyrrolo or Pyrido[1,2-<i>a</i>]imidazo[1,2-<i>c</i>]quinazolines
作者:Weidong Jiang、Ye Li、Jian-Quan Liu、Xiang-Shan Wang
DOI:10.1021/acs.orglett.3c01873
日期:2023.7.14
A protocol for a copper-catalyzed intermolecular cross-coupling cascade between 2-(2-bromoaryl)-1H-benzo[d]imidazole analogues and proline or pipecolic acid has been developed. The developed protocol allows access to a variety of synthetically useful N-fused pyrrolo or pyrido[1,2-a]imidazo[1,2-c]quinazoline scaffolds with high efficiency and good functional group compatibility. Proline or pipecolic
已开发出 2-(2-溴芳基)-1 H-苯并[ d ]咪唑类似物与脯氨酸或哌可酸之间的铜催化分子间交叉偶联级联的方案。所开发的方案允许获得各种合成有用的N-稠合吡咯或吡啶并[1,2- a ]咪唑并[1,2- c ]喹唑啉支架,具有高效率和良好的官能团兼容性。脯氨酸或哌啶酸在反应中发挥双重作用:作为配体和反应物。提出了乌尔曼偶联、脱羧、氧化和脱水反应过程的机械连续方法。