%0 Generic %A Qian, Jing %A Lin, Zhenwei %A Wang, Zaibin %A Peng, Zhixing %A Wu, Li %A Lu, Ping %A Wang, Yanguang %D 2019 %T Copper-Carbene-Triggered Electrophilic Cyclization of o‑Hydroxyarylenaminones with 3‑Diazoindolin-2-imines: Synthesis of 3‑Indolyl‑4H‑chromen-4-ones and Pyrido[2,3‑b:6,5‑b′]diindoles %U https://acs.figshare.com/articles/dataset/Copper-Carbene-Triggered_Electrophilic_Cyclization_of_i_o_i_Hydroxyarylenaminones_with_3_Diazoindolin-2-imines_Synthesis_of_3_Indolyl_4_i_H_i_chromen-4-ones_and_Pyrido_2_3_i_b_i_6_5_i_b_i_diindoles/8059220 %R 10.1021/acs.joc.9b00755.s003 %2 https://acs.figshare.com/ndownloader/files/15018020 %K solvent-dependent emission %K 3- diazoindolin -2-imines %K diindole %K photophysical properties %K substrate scope %K pyrazino %K Pyrido %K Copper-Carbene-Triggered Electrophilic Cyclization %K 3- indolyl -4 H %K chromen -4-ones %X The Cu­(II)-catalyzed electrophilic cyclization reaction between o-hydroxyarylenaminones and 3-diazoindolin-2-imines furnished 3-indolyl-4H-chromen-4-ones in moderate to good yields with a broad substrate scope. Several pyrido­[2,3-b:6,5-b′]­diindoles and one pyrazino­[2,3-b:5,6-b′]­diindole were also obtained as byproducts in some cases and tested for their photophysical properties. Pyrido­[2,3-b:6,5-b′]­diindoles exhibited solvent-dependent emission, while pyrazino­[2,3-b:5,6-b′]­diindole emitted strong luminescence with 25.6% quantum yield in cyclohexane. %I ACS Publications