Effect of hydrogen bonding on ligand substitution and its implication for the Heck reaction
作者:Jiwu Ruan、Jonathan A. Iggo、Jianliang Xiao
DOI:10.1016/j.jorganchem.2018.11.010
日期:2019.2
Simple hydrogen-bond donating ammonium cations are found to hydrogen-bond with the halo ligand of a key intermediate in the Heckreaction, [Pd(diphosphine)PhBr], and promote the substitution of the halide by a phosphine ligand. Furthermore, upon introduction of a hydorgne bond donor (HBD), the palladium intermediate reacts with an electron-richolefin to afford the expected Heck product, whereas no