One-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones catalyzed by acidic ionic liquid was written by Ma, Jing-Jun;Zang, Xiao-Huan;Zhou, Xin;Wang, Chun;Li, Jing-Ci;Li, Qing. And the article was included in Indian Journal of Chemistry in 2007.Quality Control of 1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate The following contents are mentioned in the article:
3,4-Dihydropyrimidin-2(1H)-ones were synthesized via one-pot reaction of aromatic aldehydes, Et acetoacetate and urea or thiourea catalyzed by room temperature ionic liquid [hmim]HSO4. It was observed that the proposed method is fast, efficient and environmentally benign. The reaction time is 15 ∼ 55 min with the yields between 82 ∼ 97 %. This study involved multiple reactions and reactants, such as 1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate (cas: 478935-29-4Quality Control of 1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate).
1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate (cas: 478935-29-4) belongs to imidazole derivatives. Imidazole is the basic core of some natural products such as histidine, purine, histamine and DNA based structures, etc. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Many drugs contain an imidazole ring, such as certain antifungal drugs, the nitroimidazole series of antibiotics, and the sedative midazolam.Quality Control of 1-Hexyl-3-methyl-1H-imidazol-3-ium hydrogensulfate
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem