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 Pd(acac)2/TFA catalyzed head-to-tail dimerization of vinylarenes at room temperature
作者:Hengchang Ma、Qiangsheng Sun、Wenfeng Li、Jinxia Wang、Zhe Zhang、Yaoxia Yang、Ziqiang Lei
DOI:10.1016/j.tetlet.2011.01.056
日期:2011.4
Pd(acac)2 catalyzed dimerization of vinylarenes to form dimers under mild condition with excellent yields and stereoselectivities. In particular, the use of TFA highly promoted the activity and selectivity of the dimerization. The studies on mechanism for the reaction displayed clearly that the dimerization of styrenes is 100% atom economic reaction.
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