已开发出一种有效的铜催化级联环化反应,用于选择性合成各种苯并[4,5]咪唑并[2,1- a ]异喹啉衍生物。该反应特征在于依次形成三个不同的C N键。在存在Cu(OAc)2和KO t Bu的情况下,邻炔基苯甲腈和2-碘苯胺能顺利进行,以中等至良好的产率获得相应的苯并[4,5]咪唑并[2,1- a ]异喹啉。
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。
Nucleophilic Addition of Benzimidazoles to Alkynyl Bromides/Palladium-Catalyzed Intramolecular C–H Vinylation: Synthesis of Benzo[4,5]imidazo[2,1-<i>a</i>]isoquinolines
作者:Jinsong Peng、Guoning Shang、Chunxia Chen、Zhongshuo Miao、Bin Li
DOI:10.1021/jo302471z
日期:2013.2.1
An efficient "one-pot" route for the synthesis of benzo[4,5]imidazo[2,1-a] isoquinolines has been developed via nucleophilic addition of 2-aryl benzimidazoles to alkynyl bromides and subsequent palladium-catalyzed intramolecular C-H vinylation.