Abstract
This paper describes a novel approach to CO2 hydrogenation, in which CO2 capture with aminoethanols at low pressure is coupled with hydrogenation of the captured product, oxazolidinone, directly to MeOH. In particular, (2-methylamino)ethanol or valinol captures CO2 at 1-3 bar in the presence of catalytic Cs2CO3 to give the corresponding oxazolidinones in up to 65-70 and 90-95% yields, respectively. Efficient hydrogenation of oxazolidinones was achieved using PNN pincer Ru catalysts to give the corresponding aminoethanol (up to 95-100% yield) and MeOH (up to 78-92% yield). We also have shown that both CO2 capture and oxazolidinone hydrogenation can be performed in the same reaction mixture using a simple protocol that avoids intermediate isolation or purification steps. For example, CO2 can be captured by valinol at 1 bar with Cs2CO3 catalyst followed by 4-isopropyl-2-oxazolidinone hydrogenation in the presence of a bipy-based pincer Ru catalyst to produce MeOH in 50% yield after two steps.
Original language | English |
---|---|
Pages (from-to) | 2416-2422 |
Number of pages | 7 |
Journal | ACS Catalysis |
Volume | 5 |
Issue number | 4 |
DOIs | |
Publication status | Published - Apr 3 2015 |
Keywords
- carbon dioxide
- ethanolamine
- hydrogenation
- methanol
- oxazolidinone
- pincer
- ruthenium
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)