Synthesis and Evaluation of Three 18F-Labeled Aminophenylbenzothiazoles as Amyloid Imaging Agents
摘要:
We have developed three fluorine-18 labeled 6-(methyl)amino-2-(4'-fluorophenyl)-1,3-benzothiazoles, which display high in vitro binding affinity For human amyloid beta plaques (K-i <= 10 nM). The radiolabeled F, robes were synthesized by aromatic nucleophilic Substitution of the corresponding nitro precursor with F-18-fluoride, followed by deprotection of the BOC group if required. Determination of the octanol/water partition coefficient, biodistribution studies In mice, and in vivo mu PET studies in rats and a rhesus monkey showed that initial brain uptake was high and brain washout was fast in normal animals. Radiometabolites were quantified in plasma and brain of mice and in monkey plasma using HPLC. Of the tested compounds, [F-18]2 (6-amino-2-(4'-[F-18]fluorophenyl)-1,3-benzothiazole) shows the most favorable brain kinetics in mice, rats, and a monkey. Its polar plasma radiometabolites do not cross the blood-brain barrier. The preliminary results strongly suggest that this new fluorinated compound is a promising candidate as a PET brain amyloid imaging agent.
ISOTOYPICALLY-LABELED BENZOTHIAZOLE COMPOUNDS AS IMAGING AGENTS FOR AMYLOIDOGENIC PROTEINS
申请人:Klunk William E.
公开号:US20090142269A1
公开(公告)日:2009-06-04
The present invention provides an isolated linezolid impurity, desfluoro linezolid, the preparation thereof and its use as a reference standard.
本发明提供了一种分离的利奈唑酮杂质,去氟利奈唑酮,其制备方法及其用作参考标准的用途。
PROBES FOR IMAGING HUNTINGTIN PROTEIN
申请人:CHDI Foundation, Inc.
公开号:EP3190888B1
公开(公告)日:2020-06-10
Synthesis and Evaluation of Three <sup>18</sup>F-Labeled Aminophenylbenzothiazoles as Amyloid Imaging Agents
作者:Kim Serdons、Koen Van Laere、Peter Janssen、Hank F. Kung、Guy Bormans、Alfons Verbruggen
DOI:10.1021/jm900871v
日期:2009.11.26
We have developed three fluorine-18 labeled 6-(methyl)amino-2-(4'-fluorophenyl)-1,3-benzothiazoles, which display high in vitro binding affinity For human amyloid beta plaques (K-i <= 10 nM). The radiolabeled F, robes were synthesized by aromatic nucleophilic Substitution of the corresponding nitro precursor with F-18-fluoride, followed by deprotection of the BOC group if required. Determination of the octanol/water partition coefficient, biodistribution studies In mice, and in vivo mu PET studies in rats and a rhesus monkey showed that initial brain uptake was high and brain washout was fast in normal animals. Radiometabolites were quantified in plasma and brain of mice and in monkey plasma using HPLC. Of the tested compounds, [F-18]2 (6-amino-2-(4'-[F-18]fluorophenyl)-1,3-benzothiazole) shows the most favorable brain kinetics in mice, rats, and a monkey. Its polar plasma radiometabolites do not cross the blood-brain barrier. The preliminary results strongly suggest that this new fluorinated compound is a promising candidate as a PET brain amyloid imaging agent.