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Synthesis of a PET tau tracer [(11)C]PBB3 for imaging of Alzheimer's disease.

Abstract：

:The authentic standard PBB3 and its precursor N-desmethyl-PBB3 as well as TBS-protected N-desmethyl-PBB3 precursor for radiolabeling were synthesized from 5-bromo-2-nitropyridine, acrolein diethyl acetal, 6-methoxy-2-methylbenzothiazole, and diethylchlorophosphate with overall chemical yield 1% in six steps, 2% in five steps, and 1% in six steps, respectively. [(11)C]PBB3 was prepared from either desmethyl-PBB3 or TBS-protected desmethyl-PBB3 with [(11)C]CH3OTf through N-[(11)C]methylation and isolated by HPLC combined with SPE in 20-25% and 15-20% radiochemical yield, respectively, based on [(11)C]CO2 and decay corrected to end of bombardment (EOB). The radiochemical purity was >99%, and the specific activity at EOB was 370-1110 GBq/μmol with a total synthesis time of ~40-min from EOB.

journal_name

Bioorg Med Chem Lett

journal_title

Bioorganic & medicinal chemistry letters

authors

Wang M,Gao M,Xu Z,Zheng QH

doi

10.1016/j.bmcl.2015.08.053

subject

Has Abstract

pub_date

2015-10-15 00:00:00

pages

4587-92

issue

20

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(15)30005-6

journal_volume

25

pub_type

杂志文章

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