How is 2-Aminoacetamidine dihydrobromide (CAS: 69816-37-1) typically synthesized?

2-Aminoacetamidine dihydrobromide is typically synthesized by the reaction of 2-aminoacetamide with bromine in a suitable solvent such as ethanol or acetic acid. This process involves the nucleophilic substitution of the amino group by bromine, followed by hydrolysis to form the dihydrobromide salt. The reaction is exothermic and requires careful temperature control to ensure high yield and selectivity.