Transition metal-free catalytic formylation of carbon dioxide and amide with novel poly(ionic liquid)s

Functionalised mesoporous poly(ionic liquid)s are valuable carbon dioxide capture and conversion materials. Here, an imidazole poly(ionic liquid) PIL-s1-HCO3 with a mesoporous structure was formed by the copolymerisation of vinyl-modified ionic liquids and crosslinking agents. The material has excellent adsorption properties for carbon dioxide. Using it as the catalyst, the formylation of carbon dioxide with various amides was realised at room temperature and pressure without metal participation. In addition, the material is stable in performance, easily separated, and has good reusability. In this work, relying on the new PIL as a multi-functional platform, carbon dioxide capture and the transformation to high-value-added chemicals were completed simultaneously. Using new type of poly(ionic liquid)s, the formylation of carbon dioxide and various amides was efficiently achieved at room temperature and pressure without the participation of transition metals. In this way, the enrichment and conversion of carbon dioxide can be realised at the same time. [Display omitted]