Selective difluoroalkylation of alkenes by using visible light photoredox catalysis
作者:Chunghyeon Yu、Naeem Iqbal、Sehyun Park、Eun Jin Cho
DOI:10.1039/c4cc05467a
日期:——
A visiblelight-induced process for selective difluoroalkylation of unactivated alkenes has been developed. The choice of base is crucial for governing the chemoselectivity of the process to produce difluoroalkylated alkanes and alkenes.
Trifluoromethylation of Alkenes by Visible Light Photoredox Catalysis
作者:Naeem Iqbal、Sungkyu Choi、Eunjin Kim、Eun Jin Cho
DOI:10.1021/jo3022346
日期:2012.12.21
A method for trifluoromethylation of alkenes has been developed employing visible light photoredox catalysis with CF3I, Ru(Phen)(3)Cl-2, and DBU. This process works especially well for terminal alkenes to give alkenyl-CF3 products with only E-stereochemistry. The mild reaction conditions enable the trifluoromethylation of a range of alkenes that bear various functional groups.
Mechanisms and applications of cyclometalated Pt(<scp>ii</scp>) complexes in photoredox catalytic trifluoromethylation
作者:Won Joon Choi、Sungkyu Choi、Kei Ohkubo、Shunichi Fukuzumi、Eun Jin Cho、Youngmin You
DOI:10.1039/c4sc02537g
日期:——
non-prefunctionalized alkenes and heteroarenes in the presence of CF3I under visible light irradiation. The high excited-state redox potentials of the complexes permitted oxidative quenching during the cycle, whereas reductive quenching was forbidden. Spectroscopic measurements, including time-resolved photoluminescence and laser flash photolysis, were performed to identify the catalytic intermediates and