The invention relates to chiral ionic liquids of the general formula
[A]
n
+
[Y]
n−
,
whereby n=1 or 2, the anion [Y]
n−
is the anion of an organic or inorganic proton acid and the cation [A]
+
an optically active organic ammonium cation with up to 50 carbon atoms, at least one chirality center and at least one functional group that can produce a co-ordination by forming hydrogen bridges or by providing free electron pairs. At least one chirality center is provided with a distance of up to 5 atomic bonds from the functional group. The invention also relates to a method for producing said chiral ionic liquids and to the use thereof in methods for the asymmetric synthesis, the asymmetric catalysis and for separating racemates.
Disclosed are methods for treating Alzheimer's disease, and other diseases, and/or inhibiting beta-secretase enzyme, and/or inhibiting deposition of A beta peptide in a mammal, by use of hydrazine compounds of formula (I) wherein the variables R
1
-R
9
are defined herein.