Rana, AbhijeetMukherjee, SrijanSundari, Kalimuthu AbiramiAmarajothi, Dhakshina MoorthyBiswas, Shyam2025-05-272025-05-272025-031867-3880https://riunet.upv.es/handle/10251/221140[EN] Selective chemical fixation of carbon dioxide (CO2) offers a promising approach to mitigate rising atmospheric CO2 levels while facilitating the synthesis of valuable commodity chemicals, thereby supporting the circular economy. The cycloaddition of CO2 to form alpha-alkylidene cyclic carbonates is particularly attractive due to its utilization of CO2, a low-cost C1 feedstock, in a reaction with 100% atom economy. In this study, we have developed an amine-functionalized, nitrogen-rich covalent organic polymer (COP), SNW-1@NH2, which strongly supports the grafting of Cu(I) ions within its porous framework. The synergistic interaction between SNW-1@NH2 and Cu(I) enhances the catalytic activity for the CO2 cycloaddition with propargylic alcohol, resulting in the formation of alpha-alkylidene cyclic carbonates at room temperature without the need for precious metal catalysts. Notably, the catalyst exhibits a broad substrate scope with high recyclability and maintains its structural integrity and catalytic performance. Additionally, the SNW-1@NH2 was successfully applied in the catalytic Knoevenagel condensation of benzaldehyde with cyanoacetamide, demonstrating a broad substrate scope, excellent recyclability, and stability. Mechanistic studies were performed to elucidate the reaction pathways for both catalytic processes. This work underscores the potential of nitrogen-rich porous materials in addressing the critical environmental challenges and expanding catalytic applications.Reserva de todos los derechosCatalysisC & horbarC bond formation reactionCO2 mitigationCommodity chemical synthesisCovalent-organic frameworkPorous materialArtículo10.1002/cctc.202401503Cerrado