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.