Direct Arylation of Pyrrole Derivatives in Ionic Liquids
作者:Olena Vakuliuk、Daniel T. Gryko
DOI:10.1002/ejoc.201100004
日期:2011.5
An efficient methodology for the directarylation of pyrrolederivatives has been developed. The reaction proceeds smoothly with a wide range of structurally diverse aryl iodides. Derivatives bearing an N,N-dimethylamino group at the 1-position and an aryl substituent at the 2-position were prepared for the first time. This protocol is more environmentally friendly than those previously reported because
Direct Arylation of Pyrrole Derivatives in Superbasic Media
作者:Daniel Gryko、Olena Vakuliuk、Beata Koszarna
DOI:10.1055/s-0030-1260128
日期:2011.9
Direct arylation of N-alkyl- and N-arylpyrroles with aryl iodides can be performed in superbasic media, withoutexternal addition of a transition-metal catalyst. Lithium hydroxide in dimethyl sulfoxide promotes this reaction in a regioselective manner, leading to the expected 2-arylated products in good yield. pyrrole - heterocycles - C-C coupling - C-H activation - arylhalides
Base-Mediated Direct Arylation of Pyrrole Derivatives
作者:Olena Vakuliuk、Beata Koszarna、Daniel T. Gryko
DOI:10.1002/adsc.201000723
日期:2011.4.18
perform the directarylation of electron‐rich heterocycles with aryl iodides and bromides. Lithium tert‐butoxide in DMF promotes this reaction for a variety of N‐alkyl‐ and N‐arylpyrroles as well as for benzofuran and some other electron‐rich aromatic compounds and provides the desired products in moderate to high yields. In contrast to all previous reports on the Pd‐catalyzed directarylation of indolizine
Room-Temperature Arylation of Arenes and Heteroarenes with Diaryliodonium Salts by Photoredox Catalysis
作者:Dong Xue、Jianliang Xiao、Yu-Xia Liu、Jia-Di Wang、Cong-Jun Zhao、Qing-Zhu Zou、Chao Wang
DOI:10.1055/s-0032-1318155
日期:——
Aryl radicals produced by irradiation of diaryliodonium salts with visible light under the catalysis of [Ru(bpy)(3)](2+) undergo coupling with a wide range of arenes and heteroarenes, affording various biaryls through direct C-H arylation at room temperature.