Carbon Dioxide Transformation in Imidazolium Salts: Hydroaminomethylation Catalyzed by Ru-Complexes
作者:Meher Ali、Aitor Gual、Gunter Ebeling、Jairton Dupont
DOI:10.1002/cssc.201600385
日期:2016.8.23
60 bar=6 MPa) and affords selectively secondary and tertiary amines. The presence of amine strongly reduces the alkene hydrogenation competitive pathway usually observed in the hydroformylation of terminal alkenes by Ru complexes. The catalytic system is also highly active for the reductive amination of aldehydes and ketones yielding amines in high yields (>90 %).
通过将Ru 3(CO)12溶于离子液体1 - n-丁基-3-甲基-咪唑鎓氯化物或1 - n-丁基-2,3-二甲基-咪唑鎓氯化物中生成的催化物质是高效的多功能催化剂,用于:( a)逆水煤气变换,(b)烯烃的加氢甲酰化,以及(c)醛的还原胺化。因此,烯烃与伯胺或仲胺(烯烃/胺,1:1)在CO 2 / H 2下的反应(1∶1)以高烯烃转化率(高达99%)和选择性(高达96%)提供氢氨基甲基化产物。反应在相对温和的反应条件下(120°C,60 bar = 6 MPa)进行,并提供选择性的仲胺和叔胺。胺的存在极大地降低了通常通过Ru配合物在末端烯烃的加氢甲酰化中通常观察到的烯烃氢化竞争途径。该催化体系对于醛和酮的还原胺化也具有很高的活性,可以高产率(> 90%)生成胺。