Protic ionic liquids: A highly efficient catalyst for synthesis of cyclic carbonate from carbon dioxide and epoxides was written by Xiao, Linfei;Su, Dan;Yue, Chengtao;Wu, Wei. And the article was included in Journal of CO2 Utilization in 2014.Formula: C4H7ClN2 This article mentions the following:
An efficient, inexpensive, easily prepared and sustainable catalytic system of protic ionic liquids was developed for cycloaddition of CO2 and epoxides to produce cyclic carbonates without using any co-catalyst and organic solvent. The effects of the acidity and structure of protic ionic liquid on the catalytic performance were investigated and the various reaction conditions were optimized. Notably, this catalyst was used for five times at least without appreciable loss of catalytic activity and applied for various epoxide for synthesis of corresponding cyclic carbonate in high selectivity and yield. Addnl., a mechanism for the synergistic effects of cation and anion in protic ionic liquids was also proposed. In the experiment, the researchers used many compounds, for example, 1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3Formula: C4H7ClN2).
1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3) 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. The pharmacophore of imidazole exists in bioactive compounds including amino acids, plant growth regulators and therapeutic agents.n increase of the alkyl chain length of the alcohols. Formula: C4H7ClN2
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem