Highly electrophilic aryl(2,2,2-trifluoroethyl)iodonium triflates have been used for the first time as trifluoroethyl and aryl transfer reagents in Pd-catalyzed functionalization of arylboronic acids. Electron-rich arylboronic acids reacted with aryl(2,2,2-trifluoroethyl)iodonium triflates (2a–b) in CH3CN in the presence of Pd2(dba)3 and K3PO4 at room temperature to provide trifluoroethyl arenes in
Halogen exchange between aryl grignard reagents and aryl halides in the presence of nickel(II) chloride
作者:Jiping Wang、Martin Pomerantz
DOI:10.1016/0040-4039(95)00342-a
日期:1995.4
A unique halogenexchange reaction between aryl Grignard reagents and aryl halides, which occurred during an attempted cross-coupling reaction using non-ligated nickel(II) chloride as a catalyst, has been observed. The halogenexchange takes place between arylmagnesium iodides and aryl bromides but not between arylmagnesium bromides and aryl chlorides.