Abstract: The present invention provides the use of a compound of formula (I); wherein: n is 0, 1, 2, or 3, the bonds shown with the dashed lines are saturated, or unsaturated with one or more double bonds; R, and R?are independently selected from hydrogen, alkyl, aryl, —OH, —OR? —SH, —SR?—NH, —NHR?, ?O, ?NH, ?NR?; R? is independently selected from alkyl, aryl, in the preparation of a medicament for the treatment of a disease requiring a GSK-3 inhibitor. Also provided is a compound of formula (II); wherein n is 0, 1, 2, or 3 the bonds shown with the dashed lines are saturated, or unsaturated with one or more double bonds. Also provided are methods of treating chronic neurodegenerative conditions.

Abstract: Provided are thiadiazolidine compounds of formula I wherein R1 is an organic group having at least 8 atoms selected from C or O, which is not linked directly to the N through a —C(O)— and comprising at least an aromatic ring, and their pharmaceutical compositions. These compounds are selective GSK-3 inhibitors and have improved bioavailability. They are useful for the treatment of GSK-3 mediated diseases, among others Alzheimer's disease, type II diabetes, depression and brain injury.