irradiation from a compact fluorescent lamp, low-intensity UV lamp, or sunlight. This protocol can be applied to the synthesis of perfluoroalkyl-substituted phenanthridines as well as effect the iodo-perfluoroalkylation of alkenes/alkynes and the C–H perfluoroalkylation of electron-rich arenes and heteroarenes. This C–H perfluoroalkylation reaction offers a unique method for site-selective labeling of oligopeptides
Electrochemical initiation of electron-catalyzed phenanthridine synthesis by trifluoromethylation of isonitriles
作者:M. Lübbesmeyer、D. Leifert、H. Schäfer、A. Studer
DOI:10.1039/c7cc09302k
日期:——
The electron-catalyzed formation of phenanthridines starting from isonitriles initiated by an electrochemical reduction of the Togni reagent is presented. The required number of faradays per mole of starting material and the respective yields clearly show the catalytic character of the electron in this reaction. The mechanism is supported by cyclic voltammetry experiments.
Transition Metal-Free Oxidative Radical Decarboxylation/Cyclization for the Construction of 6-Alkyl/Aryl Phenanthridines
作者:Shichao Lu、Yaling Gong、Demin Zhou
DOI:10.1021/acs.joc.5b01518
日期:2015.9.18
A radical cascade decarboxylation/cyclization of 2-isocyanobiphenyls with aliphatic carboxylic acids as well as aromatic carboxylic acids under the transition metal-free conditions was reported. This process, which included formation of two new C–C bonds and cleavage of C–COOH bonds, afforded a novel and environmentally friendly approach to producing 6-alkyl/aryl phenanthridines with moderate to good
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.