Abstract:
:Three potent antidepressants, (R)-nisoxetine, lortalamine, and oxaprotiline, with high affinity and high selectivity for the norepinephrine transporter (NET) were synthesized and radiolabeled with C-11 via [11C]methylation. The reference compounds and their corresponding normethyl precursors were synthesized via multi-step synthetic approaches. The radiochemical syntheses were performed by simple alkylation of the corresponding normethyl precursors with no-carrier-added [11C]CH3I in DMF. After HPLC purification, (R)-[N-11CH3]nisoxetine, [11C]lortalamine, and [11C]oxaprotiline were obtained in 63-97% radiochemical yields, whereas (R)-[O-11CH3]nisoxetine was obtained in 23-29% radiochemical yields due to substantial formation of the undesired N-[11C]methylated byproduct (64-70%). These C-11 labeled tracers allowed us to carry out comparative studies of NET in baboons with positron emission tomography (PET) and evaluate their potential as PET tracers for imaging brain NET.
journal_name
Bioorg Med Chemjournal_title
Bioorganic & medicinal chemistryauthors
Lin KS,Ding YSdoi
10.1016/j.bmc.2005.04.062subject
Has Abstractpub_date
2005-08-01 00:00:00pages
4658-66issue
15eissn
0968-0896issn
1464-3391pii
S0968-0896(05)00372-Xjournal_volume
13pub_type
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