Figure 3. Synthesis of 2-oxazolidinones.

2-Oxazolidinones synthesis in the autonomous integrated serial process of CO₂ interfacial [HDBU⁺][MIm⁻] catalytic reaction (188 s with pure CO₂, 251 s with natural gas containing 2.95 mol% CO₂) as optimized in Table 2, and subsequent solvent switching (DMSO to DCM) for facile work-up. Yields in the parenthesis are of isolated products and data error limit ±2.0% is acceptable.