83158-06-9Relevant articles and documents
Efficient radiosynthesis and preclinical evaluation of [18F]FOMPyD as a positron emission tomography tracer candidate for TrkB/C receptor imaging
Aliaga, Arturo,Bailey, Justin J.,Bdair, Hussein,Bernard-Gauthier, Vadim,Choi, Sangho,Kostikov, Alexey,Rosa-Neto, Pedro,Schirrmacher, Ralf,Singleton, Thomas A.
, (2020)
Herein we report an efficient radiolabeling of a 18F-fluorinated derivative of dual inhibitor GW2580, with its subsequent evaluation as a positron emission tomography (PET) tracer candidate for imaging of two neuroreceptor targets implicated in the pathophysiology of neurodegeneration: tropomyosin receptor kinases (TrkB/C) and colony stimulating factor receptor (CSF-1R). [18F]FOMPyD was synthesized from a boronic acid pinacolate precursor via copper-mediated 18F-fluorination concerted with thermal deprotection of the four Boc groups on a diaminopyrimidine moiety in an 8.7±2.8% radiochemical yield, a radiochemical purity >99%, and an effective molar activity of 187±93 GBq/μmol. [18F]FOMPyD showed moderate brain permeability in wild-type rats (SUVmax = 0.75) and a slow washout rate. The brain uptake was partially reduced (ΔAUC40–90 = 11.6%) by administration of the nonradioactive FOMPyD (up to 30 μg/kg). In autoradiography, [18F]FOMPyD exhibits ubiquitous distribution in rat and human brain tissues with relatively high nonspecific binding revealed by self-blocking experiment. The binding was blocked by TrkB/C inhibitors, but not with a CSF-1R inhibitor, suggesting selective binding to the former receptor. Although an unfavorable pharmacokinetic profile will likely preclude application of [18F]FOMPyD as a PET tracer for brain imaging, the concomitant one-pot copper-mediated 18F-fluorination/Boc-deprotection is a practical technique for the automated radiosynthesis of acid-sensitive PET tracers.
Pharmaceutical compositions
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, (2008/06/13)
The compounds of the general Formula I STR1 (wherein R1 and R2 may be the same or different and each stands for hydrogen, hydroxy, C1-6 alkoxy, C1-6 alkoxy-C1-6 alkoxy, C2-6 alkenyloxy or p