Abstract
2-(2-Bromophenyl)-4,5-diphenyl-1H-imidazole was used as an aryl halide to underwent α-arylation with 1,3-cyclohexanedione first, and then a nucleophilic addition and dehydration to give 2,3-diphenyl-6,7-dihydroimidazo[1,2-f]phenanthridin-8(5H)-one derivatives in good yields. This one-pot CuI-catalyzed procedure provided an efficient method for the synthesis of fused tetracyclic heterocycles containing both imidazole and phenanthridine moieties.
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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., Pan, WC., Liu, JQ. et al. One-pot synthesis of 2,3-diphenyl-6,7-dihydroimidazo[1,2-f]phenanthridin-8(5H)-ones catalyzed by CuI/l-proline. Monatsh Chem 149, 569–576 (2018). https://doi.org/10.1007/s00706-017-2087-5
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DOI: https://doi.org/10.1007/s00706-017-2087-5