Category: imidazoles-derivativesIn 2021 ,《4H-Chromenes as 1,3-bielectrophiles in the reaction with 2-aminobenzimidazole: synthesis of pyrimido[1,2-a]benzimidazoles》 appeared in Chemistry of Heterocyclic Compounds (New York, NY, United States). The author of the article were Osyanin, Vitaly A.; Osipov, Dmitry V.; Korzhenko, Kirill S.; Demidov, Oleg P.; Klimochkin, Yuri N.. The article conveys some information:
A method for the preparation of pyrimido[1,2-a]benzimidazoles containing a 2-hydroxybenzyl or (2-hydroxynaphthalen-1-yl)methyl group at position 3 was proposed based on the reaction of β-carbonyl-substituted 4H-chromenes and their benzo analogs with 2-aminobenzimidazole. In the case of chromenes substituted in the methylene fragment, 7,13a-dihydro-5H-benzo[5′,6′]chromeno-[3′,2′:5,6]pyrimido[1,2-a]benzimidazoles were isolated. In the experiment, the researchers used many compounds, for example, 1H-Benzo[d]imidazol-2-amine(cas: 934-32-7Category: imidazoles-derivatives)
1H-Benzo[d]imidazol-2-amine(cas: 934-32-7) can be used in the hydrolysis of a choline carbonate. It was also used in the synthesis of imidazo[1,2-a]benzimidazoles.Category: imidazoles-derivatives
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem