Organic carbonate synthesis from CO2 and alcohol over CeO2 with 2-cyanopyridine: Scope and mechanistic studies was written by Honda, Masayoshi;Tamura, Masazumi;Nakagawa, Yoshinao;Nakao, Kenji;Suzuki, Kimihito;Tomishige, Keiichi. And the article was included in Journal of Catalysis in 2014.Formula: C4H5N3O This article mentions the following:
The combination system of CeO2-catalyzed carboxylation and 2-cyanopyridine hydration (CeO2 + 2-cyanopyridine system) is effective for the direct synthesis of organic carbonates from CO2 and alcs. This catalyst system can be applied to various alcs. to afford the corresponding carbonates in high alc.-based yields. The hydration of 2-cyanopyridine over CeO2 rapidly proceeds under the low concentration of water, which can remove the water from the reaction media. Since the reaction is limited by the chem. equilibrium, the removal of water remarkably shifts the chem. equilibrium to the carbonate side, leading to high carbonate yields. In addition, 2-picolinamide that is produced by hydration of 2-cyanopyridine forms an intramol. hydrogen bonding between H atom of the amide group and N atom of the pyridine ring, which weakens the adsorption of 2-picolinamide on CeO2 by reduction of the acidity. The reaction mechanism of DMC formation in CeO2 + 2-cyanopyridine system is also proposed. In the experiment, the researchers used many compounds, for example, 1H-Imidazole-4-carboxamide (cas: 26832-08-6Formula: C4H5N3O).
1H-Imidazole-4-carboxamide (cas: 26832-08-6) belongs to imidazole derivatives. 1H-imidazole is an imidazole tautomer which has the migrating hydrogen at position 1. It is a conjugate base of an imidazolium cation. It is a conjugate acid of an imidazolide. It is a tautomer of a 4H-imidazole. Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.Formula: C4H5N3O
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem