Abstract
A sequential α-arylation of carbonyl reaction 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 carbonyl reaction 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.
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Acknowledgements
We are grateful to the Major Natural Science Foundation of Jiangsu Province (14KJA150004), and a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions for financial support.
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Dong, F., Jin, RZ., Liu, JQ. et al. Copper(I)-catalyzed α-arylation of carbonyl cascade reaction leading to benzo[4, 5] imidazo[1,2-f]phenanthridin-4(1H)-one derivatives. Res Chem Intermed 43, 5995–6006 (2017). https://doi.org/10.1007/s11164-017-2975-7
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DOI: https://doi.org/10.1007/s11164-017-2975-7