Effects of B2pin2 and PCy3 on copper-catalyzed trifluoromethylation of substituted alkenes and alkynes with the Togni reagent
作者:Pär G. Janson、Nadia O. Ilchenko、Alberto Diez-Varga、Kálmán J. Szabó
DOI:10.1016/j.tet.2014.12.077
日期:2015.2
The copper-catalyzed oxytrifluoromethylation of phenylacetylenes and C–H trifluoromethylation of quinones were studied. It was found that both reactions are accelerated by B2pin2 and PCy3 additives. The two reactions have different substituent effects. The oxytrifluoromethylation is faster in the presence of electron-donating groups, while the C–H trifluoromethylation is faster with electron-withdrawing
Copper-Catalyzed Direct C–H Trifluoromethylation of Quinones
作者:Xi Wang、Yuxuan Ye、Guojing Ji、Yan Xu、Songnan Zhang、Jiajie Feng、Yan Zhang、Jianbo Wang
DOI:10.1021/ol4016095
日期:2013.7.19
An efficient and practical methodology has been developed to introduce the CF3 group onto quinones through Cu(I)-catalyzed directC–H trifluoromethylation of quinones.
Copper-mediated C–H trifluoromethylation of quinones
作者:Nadia O. Ilchenko、Pär G. Janson、Kálmán J. Szabó
DOI:10.1039/c3cc43357a
日期:——
Quinones undergo copper-mediated CâH trifluoromethylation reactions using a hypervalent iodine reagent. The reactions have a broad synthetic scope involving naphtho, alkyl, chloro and methoxy quinones.