Abstract
Recently, the efficient chemical fixation of carbon dioxide (CO2) into high value chemicals without using noble metal catalysts has become extremely appealing from the viewpoint of sustainable chemistry. In this work, a one-pot three component reaction of propargylic alcohols, anines and CO2 that can proceed in an atom economy and environmentally benign manner by combination of CuI and tetrabutylphosphonium imidazol ([P4444][Im]) as a catalyst was described. Catalysis studies indicate that this catalytic system is an effective catalyst for the conversion of CO2 into oxazolidinones at room temperature and ambient pressure without any solvent. The results provide a useful way to design novel noble metal-free catalyst systems for the transformation of CO2 into other valuable compounds.
Highlights
With the global consumption of fossil fuels, the increasing concentration of CO2 in the atmosphere could have a significant impact on the global climate [1,2]
Oxazolidinones are a class of nitrogen-containing heterocyclic compounds which have been used as organic intermediates, chiral additives, antibacterial drugs and muscle relaxants, etc. [17,18,19,20]
We have developed an excellent and cost-competitive catalytic process catalyzed by the CuI/[P4444 ][Im] system for the transformation of CO2 to form oxazolidinones
Summary
With the global consumption of fossil fuels, the increasing concentration of CO2 in the atmosphere could have a significant impact on the global climate [1,2]. A cheap, green and highly active catalyst is urgently needed in order to make the Molecules 2019, 24, 1241 at room temperature and atmospheric pressure. Our previous revealed thatof metal saltspromising combined and withefficient ionic liquid liquid (IL)for represent hybrid catalyst that work can behas regarded as one the most catalysts chemicala new that can new hybrid hybrid catalyst catalyst can be be regarded regarded as as one one of of the the most most promising promising and and efficient efficient catalysts catalysts for for transformations of COthat. 4444 ][Im]) act as a catalyst for by these works, we report that salt and the tetrabutylphosphonium by these works, we report that tetrabutylphosphonium the three component reaction of terminal propargyl alcohols, CO2 and anines (Scheme 1).
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