RuCl<sub>3</sub> in Poly(ethylene glycol): A Highly Efficient and Recyclable Catalyst for the Conjugate Addition of Nitrogen and Sulfur Nucleophiles
作者:Yuhong Zhang、Yanguang Wang、Huaxing Zhang、Leifang Liu、Hailiang Xu
DOI:10.1055/s-2005-870010
日期:——
The 1,4-conjugate addition of primary, secondary and aromatic amines, thiols, and carbamate to α,β-unsaturated compounds mediated by a catalytic amount (0.5 mol%) of RuCl 3 in poly(ethylene glycol) (PEG) provides the desired β-substituted carbonyls in high yields. In particular, we found that primary aliphatic and aromatic amines produced the single adducts as the sole products in very high yields
在聚乙二醇 (PEG) 中催化量 (0.5 mol%) 的 RuCl 3 介导的伯胺、仲胺和芳香胺、硫醇和氨基甲酸酯与 α,β-不饱和化合物的 1,4-共轭加成提供了以高产率获得所需的β-取代羰基。特别是,我们发现脂肪族伯胺和芳香族伯胺与 RuCl 3 -PEG 以非常高的产率产生单一的加合物作为唯一的产物。RuCl 3 -PEG 很容易通过溶剂沉淀进行回收,具有高效的可回收性,高产率证明了这一点。其对水分和氧气的低敏感性、对不同官能团的高耐受性和高效的可回收性使RuCl 3 -PEG适用于实验室和工业规模的β-取代羰基化合物的合成。