Preparation method of 2,2'-bi-1H-imidazole using glyoxal and an ammonium salt
AssigneeAgency for Defense Development
InventorsJin Rai Cho, Soo Gyeong Cho, Eun Mee Goh, Jae Kyung Kim
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Abstract
Disclosed is a preparation method of 2,2′-bi-1H-imidazole using glyoxal and an ammonium salt as starting materials through a safe, simple and easily controlled synthetic process with a high yield.
Claims5
A preparation method of 2,2′-bi-1H-imidazole which comprises reacting glyoxal with excess amount of an ammonium salt selected from the group consisting of ammonium acetate, ammonium benzoate, ammonium bromide, ammonium carbonate, ammonium chloride, ammonium chromate, ammonium dichromate, ammonium formate, ammonium nitrate, ammonium oxalate, ammonium sulfamate, ammonium sulfate, ammonium sulfite, ammonium tartarate, ammonium tetrafluoroborate, ammonium thiocynanate and ammonium thiosulfate, wherein the reaction scheme is:
- and wherein NH4+A− represents an ammonium salt.
Dependencies are inferred from the claim text.