PhI(OAc)<sub>2</sub>-Mediated Synthesis of 6-(Trifluoromethyl)phenanthridines by Oxidative Cyclization of 2-Isocyanobiphenyls with CF<sub>3</sub>SiMe<sub>3</sub> under Metal-Free Conditions
作者:Qile Wang、Xichang Dong、Tiebo Xiao、Lei Zhou
DOI:10.1021/ol4022589
日期:2013.9.20
A mild and efficient method for the synthesis of 6-(trifluoromethyl)phenanthridines through oxidativecyclization of 2-isocyanobiphenyls with CF3SiMe3 under metal-free conditions was developed. The reaction allows the direct formation of C–CF3 bonds and rapid access to phenanthridine ring systems in one catalytic cycle.
Synthesis of 6-Trifluoromethylphenanthridines through Radical Trifluoromethylation of Isocyanides with Sodium Triflinate under Visible Light
作者:Jianbin Li、Clarice A. D. Caiuby、Márcio W. Paixão、Chao-Jun Li
DOI:10.1002/ejoc.201701487
日期:2018.6.7
Trifluoromethylation enabled by photochemistry enriched the toolbox of synthetic chemists, to allow the simple and efficient installation of CF3 groups in organic molecules. Herein, we report a cascade addition/annulation reaction of 2‐isocyanobiphenyls towards the synthesis of 6‐trifluoromethylphenanthridines. It is proposed that this reaction is triggered by the CF3 radical generated from photoexcited
A palladium-catalyzed tandem Suzuki/C–H arylation reaction of N-aryltrifluoroacetimidoyl chlorides with arylboronic acids has been developed. A variety of 6-(trifluoromethyl)phenanthridines were prepared in moderate to excellent yields from N-(2-bromophenyl)trifluoroacetimidoyl chlorides which can be conveniently prepared from 2-bromoaniline derivatives.
A photocatalyst-free, light promoted sequential radical addition/annulation of 2-isocyanobiphenyls to 6-trifluoromethyl phenanthridines with high efficiency is presented.
Silver-Catalyzed Tandem Trifluoromethylation and Cyclization of Aryl Isonitriles with the Langlois Reagent
作者:Xing-Guo Zhang、Yu-Rong Liu、Hai-Yong Tu
DOI:10.1055/s-0034-1378810
日期:——
A mild and efficient procedure for the silver-catalyzed tandem trifluoromethylation and cyclization of aryl isonitriles with the Langlois reagent (sodium triflinate) is developed. A series of trifluoro-methylated phenanthridines is prepared in moderate to good yields from a cheap and stable trifluoromethyl source.