Cycloaddition Reaction of Carbon Dioxide to Epoxides Catalyzed by Polymer-Supported Quaternary Phosphonium Salts

Table 2

Cycloaddition reactions of CO₂ to different epoxides.

Entry	Epoxides	Products	Time (h)	Selectivity (%)	Yield (%)
1			6	99.9	93.0
2			6	99.4	98.6
3			10	98.6	95.8
4			9	79.2	73.7
5			48	88.2	72.3

Reaction conditions: epoxide 3 mL, PS-QPS-1 0.08 g, 5 MPa CO₂, 150°C.