Synthesis and in vivo evaluation of [18F]N-(2-benzofuranylmethyl)-N′-[4-(2-fluoroethoxy)benzyl]piperazine, a novel σ1 receptor PET imaging agent
摘要:
N-(2-Benzofuranylmethyl)-N'-[4-(2-fluoroethoxy)benzyl]piperazine (6, sigma(1) K-i = 2.6 nM) was radiolabeled with fluorine-18 to provide a potential sigma(1) receptor radioligand for use in positron emission tomography (PET). Radiofluorination of the appropriate tosylate precursor furnished [F-18]6 with a specific activity of 45 GBq/mu mol, in an average radiochemical yield of 18% and greater than 98% radiochemical purity. MicroPET imaging in Papio hamadryas baboon brain revealed [F-18]6 uptake consistent with sigma receptor distribution, and specificity for sigma receptors was demonstrated in a haloperidol pre-treated animal. [F-18]6 possesses suitable properties for PET imaging of sigma(1) receptors, and further investigation of this sigma(1) receptor tracer is warranted. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis and in vivo evaluation of [18F]N-(2-benzofuranylmethyl)-N′-[4-(2-fluoroethoxy)benzyl]piperazine, a novel σ1 receptor PET imaging agent
摘要:
N-(2-Benzofuranylmethyl)-N'-[4-(2-fluoroethoxy)benzyl]piperazine (6, sigma(1) K-i = 2.6 nM) was radiolabeled with fluorine-18 to provide a potential sigma(1) receptor radioligand for use in positron emission tomography (PET). Radiofluorination of the appropriate tosylate precursor furnished [F-18]6 with a specific activity of 45 GBq/mu mol, in an average radiochemical yield of 18% and greater than 98% radiochemical purity. MicroPET imaging in Papio hamadryas baboon brain revealed [F-18]6 uptake consistent with sigma receptor distribution, and specificity for sigma receptors was demonstrated in a haloperidol pre-treated animal. [F-18]6 possesses suitable properties for PET imaging of sigma(1) receptors, and further investigation of this sigma(1) receptor tracer is warranted. (C) 2011 Elsevier Ltd. All rights reserved.