Highly chemo/regioselective alkoxycarbonylation of terminal allenes catalyzed by Ru/N-ligand system
作者:Peng Wang、Huibing Shi、Baolin Feng、Deming Zhao、Haigang Wu
DOI:10.1007/s00706-023-03117-9
日期:2023.10
aliphatic alcohols (also as solvent) allow to produce useful α,β-unsaturated esters in good to excellent yields at 70 °C. Efficient regioselectivity could be controlled in the presence of N-ligands while the P-ligands had no influence on the conversion of substrates and the chemo/regioselectivity of target products. By involving N-ligand 4,7-dimethyl-1,10-phenanthroline in the catalytic system, α,β-unsaturated
Ru 催化的丙二烯与脂肪醇(也作为溶剂)的高选择性烷氧基羰基化反应可以在 70 °C 下以良好至优异的产率生产有用的α , β-不饱和酯。在 N-配体存在的情况下可以控制有效的区域选择性,而 P-配体对底物的转化和目标产物的化学/区域选择性没有影响。通过将N-配体4,7-二甲基-1,10-菲咯啉引入催化体系,得到了具有高转化率和化学/区域选择性的α , β-不饱和酯(转化率高达99%,化学选择性高达99%,支链酯/直链酯的区域选择性高达 89/11)。 图形概要