三氟甲基化
化学
试剂
三氟甲磺酸
三氟甲基
光化学
组合化学
电子受体
催化作用
有机化学
药物化学
烷基
作者
Hiromichi Egami,Yoshitaka Hamashima,Yuta Ito,Takafumi Ide,Shuya Masuda
出处
期刊:Synthesis
[Georg Thieme Verlag KG]
日期:2018-06-26
卷期号:50 (15): 2948-2953
被引量:30
标识
DOI:10.1055/s-0037-1609759
摘要
The trifluoromethylation of various aromatic compounds with Umemoto reagent II (2,8-difluoro-5-(trifluoromethyl)-5H-dibenzo[b,d]thiophen-5-ium triflate) proceeded in moderate to good yields under simple photo-irradiation conditions without any catalyst, additive, or activator. UV-Vis and NMR spectral analyses indicated that pre-formation of an electron donor-acceptor complex between the trifluoromethylating reagent and the substrate, as proposed in previous studies, is not essential for generation of the trifluoromethyl radical. Instead, the radical appears to be formed by simple photo-activation of the Umemoto reagent.
科研通智能强力驱动
Strongly Powered by AbleSci AI