A novel iron-catalyzed aminolysis of beta-carbonyl 1,3-dithianes with various amines including ammonia, primary and secondary amines, as well as hydrazine hydrate has been developed, leading to the synthesis of steleodefined beta-enaminones and 3,4-disubstituted pyrazoles in good to high yields.
Michalik, M., Journal fur praktische Chemie (Leipzig 1954), 1985, vol. 327, # 6, p. 908 - 916