Iron-Catalysed Regio- and Stereoselective Head-to-Tail Dimerisation of Styrenes
作者:Jose R. Cabrero-Antonino、Antonio Leyva-Pérez、Avelino Corma
DOI:10.1002/adsc.201000096
日期:——
Cationic iron salts and complexes catalyse the head‐to‐tail dimerisation of styrene derivatives to form the corresponding dimers with good to excellent yields and stereoselectivities. In particular, the use of a phosphine‐iron(III) complex allows the recovery and reuse of the catalyst. The counteranion plays an important role in both the activity and selectivity. These catalysts constitute an alternative
A palladium-indium triflate catalyst was found to be much more active for the dimerization of vinylarenes compared with generally used cationic palladium(II) catalysts.
Highly Efficient Catalytic Dimerization of Styrenes<i>via</i>Cationic Palladium(II) Complexes
作者:Ji Hye Choi、Jae Kwan Kwon、T. V. RajanBabu、Hwan Jung Lim
DOI:10.1002/adsc.201300864
日期:2013.12.16
AbstractA highly efficient head‐to‐tail dimerization of a styrene was developed using a cationic palladium(II)‐catalyzed selective CC bond forming reaction. The complex [AllylPd(PPh3)]+OTf−, which is believed to generate ‘palladium hydride’ (PdH), catalyzed the dimerization of various styrenes in excellent yields as single isomers. This Pd(II)‐catalyzed reaction provides a new economical CC bond forming method.magnified image