Cationic Nickel(II)-Catalyzed Hydrosilylation of Alkenes: Role of P, N-Type Ligand Scaffold on Selectivity and Reactivity
作者:Istiak Hossain、Joseph A. R. Schmidt
DOI:10.1021/acs.organomet.0c00551
日期:2020.9.28
Seven structurally similar cationic nickel(II)–alkyl complexes were synthesized by using a series of P, N ligands, and their reactivity was explored in the hydrosilylation of alkenes. More electron-rich phosphines enhanced the overall reactivity of the transformation; in contrast, groups on the imine donor had little impact. Overall, these catalysts displayed reactivity and selectivity that was previously
Distinct Catalytic Performance of Cobalt(I)–<i>N</i>-Heterocyclic Carbene Complexes in Promoting the Reaction of Alkene with Diphenylsilane: Selective 2,1-Hydrosilylation, 1,2-Hydrosilylation, and Hydrogenation of Alkene
作者:Yafei Gao、Lijun Wang、Liang Deng
DOI:10.1021/acscatal.8b02513
日期:2018.10.5
selectivity in catalyzing the reaction of alkene with Ph2SiH2. [(IAd)(PPh3)CoCl] (IAd = 1,3-diadamantylimidazol-2-ylidene) is an efficient catalyst for anti-Markovnikov hydrosilylation of monosubstituted alkenes. [(IMes)2CoCl] (IMes = 1,3-dimesitylimidazol-2-ylidene) shows Markovnikov-addition selectivity in promoting the hydrosilylation of aryl-substituted alkenes. [(IMe2Me2)4Co][BPh4] (IMe2Me2 = 1,3-dimethyl-4
Unexpected catalytic activity of simple triethylborohydrides in the hydrosilylation of alkenes
作者:M. Zaranek、S. Witomska、V. Patroniak、P. Pawluć
DOI:10.1039/c7cc01531c
日期:——
triethylborohydride-catalysed hydrosilylation of alkenes is reported. The hydrosilylation of certain alkenes, in particular styrenes, vinylsilanes and allyl glycidyl ether, with aromatic hydrosilanes proceeded in a highlyregioselective manner to give Markovnikov products. It is significant that several protocols use NaHBEt3 as a reducing agent generating active catalysts in situ of other hydrosilylation reactions. An