Titanium-promoted allyl transfer to carbon monoxide and other unsaturated molecules
作者:Bert Klei、Jan H. Teuben、Henk J. Liefde de Meijer
DOI:10.1039/c39810000342
日期:——
Carbonylation of Cp2Ti-(π-allyl) yields Cp2Ti(CO)2 and triallylmethanol; reactions of Cp2Ti-(π-allyl) and Cp2Ti-(π-1-methylallyl) with other ligands proceed via insertion or allyl-elimination pathways.
Generation of Allylic Indium by Hydroindation of 1,3-Dienes and One-Pot Reaction with Carbonyl Compounds
作者:Naoki Hayashi、Hiroyuki Honda、Makoto Yasuda、Ikuya Shibata、Akio Baba
DOI:10.1021/ol061797n
日期:2006.9.1
A hydroindation of 1,3-dienes by dichloroindium hydride (HInCl2) generates allylic indiums that react with carbonyl or imine moieties in a one-pot treatment. The former reaction proceeds in a radical manner, and the latter is ionic allylation. Moreover, both reactions require no additives such as radical initiators, Lewis acids, or transition metal catalysts.
Vinyl Grignardreagents reacted with cyclic ethers in the presence of a nickel catalyst giving rise to 2:1 coupling products 1 regioselectively. When chlorosilanes were used instead of cyclic ethers, 2:2 component coupling products 6 were obtained. A plausible reaction pathway via 1,3-butadiene–nickel complex and (2-butene-1,4-diyl)magnesium was proposed.
for carbon–carbon bond formation; however, consumption of stoichiometric amounts of metals is problematic. We developed electrochemical allylation reactions of imines catalyzed by nitrogen-doped carbon-supported single-atom zinc, which were fixed on a cathode to afford a range of homoallylic amines efficiently. The system could suppress generation of metallic waste, and the catalyst electrode showed