How is 4-Bromobenzenecarboximidamide hydrochloride (CAS: 55368-42-8) typically synthesized?

4-Bromobenzenecarboximidamide hydrochloride (CAS: 55368-42-8) is usually synthesized by reacting 4-bromobenzenecarboxylic acid with anhydrous hydrazine followed by acidification with hydrochloric acid. Commonly, the reaction is carried out in a two-step process: first, the formation of the amide from the carboxylic acid and hydrazine, and second, the conversion of the amide to the hydrochloride盐酸盐 form with hydrochloric acid. The reaction is typically performed under mild conditions to ensure high selectivity and yield.