Copper-Catalyzed Cascade Synthesis of Alkyl 6-Aminobenzimidazo[2,1-a]isoquinoline-5-carboxylates
摘要:
A convenient and efficient copper-catalyzed cascade method has been developed for synthesis of benzimidazoisoquinoline derivatives via reactions of readily available substituted 2-(2-halophenyObenzoimidazoles with alkyl cyanoacetates under mild condition, and the corresponding alkyl 6-aminobenzimidazo[2,1-a]isoquinoline-5-carboxylates were obtained in good to excellent yields. The novel method provides diverse and useful poly N-heterocyclic compounds for combinatorial chemistry and medicinal chemistry.
Copper-catalyzed cascade synthesis of benzimidazoquinazoline derivatives under mild condition
作者:Shan Xu、Juyou Lu、Hua Fu
DOI:10.1039/c1cc10383k
日期:——
A convenient and efficient copper-catalyzedcascade method has been developed for the synthesis of benzimidazoquinazoline derivatives via reactions of readily available substituted 2-(2-halophenyl)benzoimidazoles with amidines or guanidine under mild conditions (even at room temperature).
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。
General and efficient copper-catalyzed aerobic oxidative synthesis of N-fused heterocycles using amino acids as the nitrogen source
作者:Qing Liu、Haijun Yang、Yuyang Jiang、Yufen Zhao、Hua Fu
DOI:10.1039/c3ra41644e
日期:——
efficient copper-catalyzed aerobic oxidative method for the synthesis of N-fused heterocycles has been developed by using readily available α-amino acids as the nitrogen source. The reactions underwent N-arylation, aerobic oxidative dehydrogenation, intramolecular cyclization and dissociation of formic acid. This method should provide a general and practical strategy for the construction of N-fused
Copper(I)-catalyzed α-arylation of carbonyl cascade reaction leading to benzo[4, 5] imidazo[1,2-f]phenanthridin-4(1H)-one derivatives
作者:Fang Dong、Rong-Zhang Jin、Jian-Quan Liu、Xiang-Shan Wang
DOI:10.1007/s11164-017-2975-7
日期:2017.11
α-arylation of carbonylreaction and intra-molecular cyclization of 2-(2-bromophenyl)-1H-benzo[d]imidazoles with cyclohexane-1,3-diones was described in 1,4-dioxane catalyzed by Cu(I)/l-proline. It provided an efficient method for the synthesis of benzo[4, 5]imidazo[1,2-f] phenanthridin-4(1H)-ones with high efficiency in mild conditions. Graphical Abstract A sequential α-arylation of carbonylreaction and intra-molecular
摘要 在Cu(1,4-二恶烷)催化下,描述了羰基反应的顺序α-芳基化和2-(2-溴苯基)-1H-苯并[ d ]咪唑与环己烷-1,3-二酮的分子内环化I)/ l-脯氨酸 它为温和条件下高效合成苯并[4,5]咪唑并[1,2 - f ]菲啶-4(1 H)-提供了一种有效的方法。 图形概要 在Cu()催化的1,4-二恶烷中描述了羰基反应的顺序α-芳基化和2-(2-溴苯基)-1 H-苯并[ d ]咪唑与环己烷-1,3-二酮的分子内环化I)/ l-脯氨酸
Synthesis of Quinazolinones, Imidazo[1,2-<i>c</i>
]quinazolines and Imidazo[4,5-<i>c</i>
]quinolines through Tandem Reductive Amination of Aryl Halides and Oxidative Amination of C(sp<sup>3</sup>
)-H Bonds
2-c]quinazolines and imidazo[4,5-c]quinolines. The reaction involves a copper-catalyzed reductiveamination through azidation followed by reduction and oxidative amination of C(sp3)–H bonds of N,N-dimethylacetamide in the presence of TBHP (tert-butylhydroperoxide) as oxidant. The method uses the easily available sodium azide as a nitrogen source and DMA (N,N-dimethylacetamide) as a one-carbon source for the