47135-83-1Relevant articles and documents
Ring-Expansion Strategy for α-Aryl Azahelicene Construction: Building Blocks for Optoelectronic Materials
Chao, Zengyin,Feng, Jia,Gu, Zhenhua,Hong, Biqiong,Wang, Limin,Xue, Xiaoping
supporting information, p. 8056 - 8061 (2021/10/25)
An acid-mediated rapid synthesis of α-aryl azahelicenes via C-C bond cleavage of helical 9H-fluoren-9-ols is reported. The newly introduced aryl ring and pyridine moieties provide an excellent opportunity to further tune the properties of azahelicences: i.e., photoluminescence. The novel α-aryl azahelicenes showcase high circularly polarized luminescence (CPL) efficiencies (4.5 × 10-3) as well as CPL brightness (BCPL), reaching 7.39 M-1 cm-1, which indicates a potential application as chiral emitters.
Preparation of phenanthridines from N-(o-arylbenzyl)trifluoromethanesulfonamides with 1,3-diiodo-5,5-dimethylhydantoin
Yanai, Kei,Togo, Hideo
, (2020/10/07)
Treatment of N-(o-arylbenzyl)trifluoromethanesulfonamides with 1,3-diiodo-5,5-dimethylhydantoin in 1,2-dichloroethane under irradiation with a tungsten lamp, followed by the reaction with tBuOK gave the corresponding 6-arylphenanthridines and 6-unsubstituted phenanthridines in good to moderate yields, respectively. The reaction proceeds through an oxidative cyclization onto the aromatic ring by sulfonamidyl radicals formed from the N-iodosulfonamides. The present reaction is a one-pot method for the preparation of both 6-arylphenanthridines and 6-unsubstituted phenanthridines from N-(o-arylbenzyl)trifluoromethanesulfonamides under transition-metal-free conditions.
Synthesis of phenanthridines by I2-mediated sp3C-H amination
Chang, Junbiao,Fang, Benyao,Hou, Jiao,Tian, Jinyue,Yu, Wenquan
, p. 3312 - 3323 (2020/05/14)
An I2-mediated synthesis of phenanthridinesviaintramolecular sp3C-H amination of readily accessible aniline precursors is reported. The present synthetic process is straightforward and applicable to a broad variety of unprotected ani