(3-Methoxy-naphthalen)-2-yl- (1-benzyl-piperidin) 4-yl-acetate (SB-235753) was labelled with C-11 (t(1/2) = 20.4 min) as a putative radioligand for the non-invasive assessment of Dopamine D-4 receptors in vivo with positron emission tomography (PET). The precursor for the radiosynthesis 3-hydroxynaphthyl-2-[(N-benzyl)piperidyl]-acetate hydrochloride was prepared by a four-step synthesis starting from ethyl-4-pyridyl acetate. The radiolabelling consisted of methylation with [C-11]methyltriflate in dimethylformamide in the presence of potassium hydroxide. [C-11]SB-235753, was synthesised in 30 min with a radiochemical yield of 10 +/- 5% (EOS, non-decay corrected) with 99% radiochemical purity and specific radioactivity of 10 +/- 3 Ci/mu mol. Biodistribution studies in rats with [C-11]SB-235753 showed the uniform distribution of the tracer within different areas of the murine brain. At 30 min after injection 99% of the radioligand in plasma and 100% in cerebellum was metabolised. These findings-suggest that [C-11]SB-235753 can not be a suitable tracer for dopamine D-4 receptor studies with PET.
|Citazione:||Matarrese, M., Soloviev, D., Moresco, R.M., Todde, S.C., Simonelli, P., Colombo, D., et al. (2000). Synthesis and in vivo evaluation of 3-[C-11]methyl-(3-methoxy-naphthalen)-2-yl-(1-benzyl-piperidin)-4-yl-acetate (SB-235753), as a putative dopamine D-4 receptors antagonist for PET. JOURNAL OF LABELLED COMPOUNDS & RADIOPHARMACEUTICALS, 43(4), 359-374.|
|Tipo:||Articolo in rivista - Articolo scientifico|
|Titolo:||Synthesis and in vivo evaluation of 3-[C-11]methyl-(3-methoxy-naphthalen)-2-yl-(1-benzyl-piperidin)-4-yl-acetate (SB-235753), as a putative dopamine D-4 receptors antagonist for PET|
|Autori:||Matarrese, M; Soloviev, D; Moresco, RM; Todde, SC; Simonelli, P; Colombo, D; Magni, F; Carpinelli, A; Fazio, F; Kienle, MD|
|Data di pubblicazione:||30-mar-2000|
|Rivista:||JOURNAL OF LABELLED COMPOUNDS & RADIOPHARMACEUTICALS|
|Appare nelle tipologie:||01 - Articolo su rivista|