Publication number: 20150004100
Abstract: Pyridazinone compounds of Formula I: (I) wherein: R? is alkyl or Ar, optionally substituted with at least one alkyl, halogen, hydroxyl, alkoxy, haloalkoxy, acid, ester, amino, nitro, amide, or alkoxyhalo; 2 R is independently alkyi, alkynyl, ester, amino, amide, acid, aryl, heteroaryl, aminoalkyl, —C(=0)alkyl, —C(=0)aryl, —C(=0)heteroaryl, —C(=0)heterocycloalkyl, —C(=0)heterocycloalkylAr, —C(=0)(CH2)nhalo, —C(?O)(CH2)nheterocyclyl, or —SC?Ar, optionally substituted with at least one alkyi, alkylhalo, halogen, nitro, aryl, heteroaryl, or heteroaryl(CH2)nhalo; R3 and R4 are independently hydrogen, alkyi, alkenyl, alkynyl, aryl, heteroaryl; Ar is an aryl, heteroaryl, cycloalkyl, heterocycloalkyl group; n is an integer from 0-10; or a radiolabeled derivative thereof. The compounds are useful as imaging probes of Tau pathology in Alzheimer's disease are described. Compositions and methods of making such compounds are also described.
Type:
Application
Filed:
December 13, 2012
Publication date:
January 1, 2015
Applicant:
GE HEALTHCARE LIMITED
Inventors:
Clare Jones, Matthias Eberhard Glaser, Duncan Wynn, James Nairne, Umamaheshwar P. Mokkapati, Ian Martin Newington, Chitralekha Rangswamy, Jinto Jose, Saga Johansson