6510-65-2Relevant articles and documents
Secondary phosphine oxides assisted palladium complexes catalyzed catellani reaction for the formation of carbazole derivatives
Chen, Ya-Chan,Chou, Hsueh-Min,Kao, I-Hsiang,Chang, Yu-Chang,Hong, Fung-E.
, p. 389 - 396 (2017)
Several secondary phosphine oxides (SPOs, 2a-2d) as well as 2a-chelated palladium complex 2a_Pd were employed in Catellani type reaction for the synthesis of 1-methyl-9H-carbazole (4) from 2-iodotoluene and N-(2-bromophenyl)acetamide (3). The application
A versatile carbazole donor design strategy for blue emission switching from normal fluorescence to thermally activated delayed fluorescence
Dong, Ruizhi,Li, Jiuyan,Liu, Di,Niu, Rui,Shi, Chunlong,Tian, Houru,Wei, Wenkui
, (2021)
The weak electron donating ability of carbazole is most suitable for constructing the donor-acceptor type blue emitters, but its low spatial requirements caused by the five-membered ring bridged structure is not favorable for spatial separation of frontier molecular orbitals. So many carbazole based compounds do not exhibit thermally activated delayed fluorescence (TADF). Herein, a more sterically demanding group was introduced at the 1-site of carbazole to form 1-methylcarbazole (1-MeCz), in order to construct a versatile donor for blue TADF materials. 1-MeCz was used as donor in combination with triazine and pyrimidine as acceptors to design novel compounds 1-MeCz-TRZ and 1-MeCz-Pm. It was observed that the presence of the methyl group at the 1-site of carbazole enhanced the twisted angles and reduced frontier molecular orbital overlapping, successfully switching the blue emission from the normal fluorescence of the methyl-free reference compounds (Cz-TRZ and Cz-Pm) to TADF of 1-MeCz-TRZ and 1-MeCz-Pm. The organic light-emitting diodes of 1-MeCz-TRZ and 1-MeCz-Pm exhibited blue emission at 450 and 458 nm with Commission Internationale de L'Eclairage (CIE) coordinates of (0.15, 0.11) and (0.17, 0.18), and external quantum efficiencies of 13.07% and 7.53%. This study provides a versatile, simple and practical design strategy with 1-MeCz to construct pure blue TADF emitters in combination with various acceptors.
Visible-light-promoted intramolecular C-H amination in aqueous solution: Synthesis of carbazoles
Yang, Lizheng,Zhang, Yipin,Zou, Xiaodong,Lu, Hongjian,Li, Guigen
, p. 1362 - 1366 (2018/03/26)
An effective and operationally simple protocol is reported for the synthesis of versatile carbazoles. With water as a co-solvent, visible-light rather than various metals is used to facilitate the conversion of readily available 2-azidobiphenyls under mild conditions. Various functionalized bioactive natural alkaloids, such as glycoborine, clausine C, clausine L, clausine H and clauszoline K, were synthesized efficiently with nitrogen as a sole byproduct. The reaction could be performed in water, acidic or alkaline buffer solutions, showing its potential for applications in biochemistry.