The dual reactivity of 3-aminorhodanine
Abstract3-Aminorhodanine in ethanol reacts in the hydrazine form with aromatic aldehydes to give 3′-arylidene derivatives, while in ammonia it reacts in the tautomeric thiol form to give 5-arylidene derivatives. 3′, 5-Diarylidene derivatives of 3-aminorhodanine can be obtained by reacting aromatic aldehydes with 3′ -aminorhodanine in glacial acetic acid, with 3-arylideneminorhodanines in ammonia solution, or with 5-aryliden-3-aminorhodanines in ethanol.