A modern and practical laccase-catalysed route suitable for the synthesis of 2-arylbenzimidazoles and 2-arylbenzothiazoles
作者:Mudzuli Maphupha、Wanyama P. Juma、Charles B. de Koning、Dean Brady
DOI:10.1039/c8ra07377e
日期:——
Green chemistry: laccase in acetonitrile and buffer in the presence of O2 can synthesise benzimidazoles and benzothiazoles in good yields.
绿色化学:在乙腈和缓冲液中,存在氧气的情况下,漆酶可以合成苯并咪唑和苯并噻唑,产率较高。
An efficient synthesis of 6-arylbenzo[4,5]imidazo[2,1-a]isoquinolines via sequential α-arylation of carbonyl and deacylation catalyzed by CuI
作者:Wei-Qing Miao、Jian-Quan Liu、Xiang-Shan Wang
DOI:10.1039/c7ob01022b
日期:——
Dibenzoyl methane was found to undergo α-arylation of carbonyl and deacylation reaction with 2-(2-bromophenyl)-1H-benzo[d]imidazoles catalyzed by CuI in the presence of Cs2CO3, and provided an efficientsynthesis of 6-arylbenzo[4,5]imidazo[2,1-a]isoquinolines via subsequent intra-molecular nucleophilic addition and dehydration.
发现二苯甲酰甲烷在Cs 2 CO 3存在下与CuI催化的2-(2-溴苯基)-1 H-苯并[ d ]咪唑发生羰基的α-芳基化反应和脱酰反应,并有效合成了6 -芳基苯并[4,5]咪唑并[2,1- a ]异喹啉通过随后的分子内亲核加成和脱水作用。
Copper-catalyzed C-C coupling and cyclization: Synthesis of benzo[4,5]imidazo[1,2-a]pyridines and benzo[4,5]imidazo[2,1-a]isoquinolines
作者:Byeong Woo Yang、Pham Duy Quang Dao、Nam Sik Yoon、Chan Sik Cho
DOI:10.1016/j.jorganchem.2017.09.025
日期:2017.11
3-diketones in DMF in the presence of a catalytic amount of copper(I) iodide and a base to afford the corresponding benzo[4,5]imidazo[1,2-a]pyridines in moderate yields. 2-(2-Bromoaryl)benzimidazoles also react with 1,3-diketones under similar reaction conditions to give benzo[4,5]imidazo[2,1-a]isoquinolines in similar yields.
在催化量的碘化铜(I)和碱存在下,将2-(2-溴乙烯基)苯并咪唑与1,3-二酮在DMF中偶联并环化,得到相应的苯并[4,5]咪唑[1, 2- α ]吡啶的产率中等。2-(2-溴芳基)苯并咪唑还可以在相似的反应条件下与1,3-二酮反应,以相似的产率得到苯并[4,5]咪唑并[2,1- a ]异喹啉。
Synthesis of Trinuclear Benzimidazole‐Fused Hybrid Scaffolds by Transition Metal‐Free Tandem C(sp
<sup>2</sup>
)−N Bond Formation under Microwave Irradiation
作者:Pham Duy Quang Dao、Chan Sik Cho
DOI:10.1002/ejoc.202100419
日期:2021.8.6
A class of trinuclear N-fused hybrid scaffolds was constructed by transition metal-freeC(sp2)-N coupling and cyclization of 2-(2-bromoaryl)- or 2-(2-bromovinyl)benzimidazoles with 2-methoxy- or 2-aryloxybenzimidazoles under microwave irradiation.
Construction of Binuclear Benzimidazole-Fused Quinazolinones and Pyrimidinones Using Aryl Isocyanates as Building Blocks by Transition-Metal-Free C(sp<sup>2</sup>)–N Coupling
作者:Pham Duy Quang Dao、Chan Sik Cho
DOI:10.1021/acs.joc.0c02067
日期:2020.10.16
of binuclear N-fused hybrid scaffolds was constructed by the reaction of 2-(2-bromoaryl)- and 2-(2-bromovinyl)benzimidazoles with aryl isocyanates as building blocks in the presence of a base under microwave irradiation. A nucleophilic addition followed by an unprecedented transition-metal-free C(sp2)–N coupling is proposed as a reaction pathway of this green process.