Ethane-1, 2-diaminium hydrogen sulfate was synthesised and characterised by NMR and elemental analysis techniques, and found to exhibit high catalytic efficiency towards one-pot Mannich-type reactions of ketones with aromatic aldehydes and aromatic amines in ethanol. This method has the advantages of mild conditions, availability of starting materials, compatibility with a variety of functionalities, and simple work-up procedures. This catalyst ...
[Mansour, El-Sayed M. E.; El-Sadany, Samir K.; Kassem, Ahmed A.; Maksoud, Hamdy A. Journal of Chemical & Engineering Data, 1989 , vol. 34, # 3 p. 368 - 370]