Hydrochloric Acid → HCID 178507226, compound

Participants

Reaction Steps

A solution of concentrated hydrochloric acid (2.8 ml, 0.028 M) in aqueous ethanol (50%, 15 ml) was added dropwise to a stirred heated mixture of 2-(2,6-dibromo-4-nitro phenylimino)imidazolidine (4 g, 0.011 M) and iron powder (1.9 g, 0.034 M) in aqueous ethanol (50%). The mixture was heated under reflux for 3 hours after which time it was filtered hot and evaporated to a low volume. This residual solution was acidified with dilute hydrochloric acid and the resulting solid was removed. The solutionwas then basified with dilute aqueous sodium hydroxide yielding a solid which was collected. This solid was triturated with hot methanol which wasthen evaporated to leave a brown solid (3.2 g). This solid was chromatographed on alumina and eluted with a methanol in methylene chloride gradient. The fractions containing the required compound were combined and evaporated affording 2-(4-amino-2,6-dibromophenylimino)imidazoline dihydrochloride, mp>320° C. (1.6 g).

Provenance & Evidence