new and efficient method for the synthesis of various aza‐fused poly‐hetero aromatics has been described. This protocol includes an intermolecular condensation followed by metal‐free base‐promoted intramolecular C―Ncoupling reaction. The advantage of this one‐pot transformation lies in the use of simple cyclic amidines‐like compounds without prefunctionalization of the starting heterocycles.
One-Pot Synthesis of Benzo[4,5]imidazo[1,2-<i>a</i>]quinazoline Derivatives via Facile Transition-Metal-Free Tandem Process
作者:Shuai Fang、Xiaoyi Niu、Bingchuan Yang、Yanqiu Li、Xiaomeng Si、Lei Feng、Chen Ma
DOI:10.1021/co500001u
日期:2014.7.14
A one-pot transition metal-free method for synthesizing benzo[4,5]imidazo[1,2-a]quinazoline and imidazo-[1,2-a]quinazoline derivatives has been developed. The approach is widely applicable to 2-fluoro-, 2-chloro-, 2-bromo- and 2-nitro-substituted aryl aldehyde and ketone substrates. The fluorescence properties of target compounds were studied.
CuI-Catalyzed C–N Bond Formation and Cleavage for the Synthesis of Benzimidazo[1,2-<i>a</i>]quinazoline Derivatives
作者:Chao Li、Wen-Ting Zhang、Xiang-Shan Wang
DOI:10.1021/jo5007398
日期:2014.6.20
domino reaction of N-(2-benzimidazolyl)-2-aminobenzamide and 2-halogenated benzaldehyde has been studied. The procedure is based on a sequential CuI-catalyzed Ullmann reaction (C–N bond formation) and two bond cleavage reactions and provides an efficient strategy for the synthesis of benzimidazo[1,2-a]quinazolines catalyzed by CuI/l-proline.
研究了N-(2-苯并咪唑基)-2-氨基苯甲酰胺与2-卤代苯甲醛的铜(I)催化的多米诺反应。该方法基于顺序的CuI催化的Ullmann反应(C–N键形成)和两个键裂解反应,为CuI / 1-脯氨酸催化的苯并咪唑并[1,2- a ]喹唑啉合成提供了有效的策略。