Synthesis of a PET tau tracer [11C]PBB3 for imaging of Alzheimer’s disease
摘要:
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. [C-11]PBB3 was prepared from either desmethyl-PBB3 or TBS-protected desmethyl-PBB3 with [C-11]CH3OTf through N-[C-11] methylation and isolated by HPLC combined with SPE in 20-25% and 15-20% radiochemical yield, respectively, based on [C-11]CO2 and decay corrected to end of bombardment (EOB). The radiochemical purity was > 99%, and the specific activity at EOB was 370-1110 GBq/mu mol with a total synthesis time of similar to 40-min from EOB. (C) 2015 Elsevier Ltd. All rights reserved.
[EN] ISOXAZOLIDINE DERIVED INHIBITORS OF RECEPTOR INTERACTING PROTEIN KINASE 1 (RIPK 1)<br/>[FR] INHIBITEURS DÉRIVÉS D'ISOXAZOLIDINE DE PROTÉINE KINASE 1 INTERAGISSANT AVEC UN RÉCEPTEUR (RIPK 1)
申请人:DENALI THERAPEUTICS INC
公开号:WO2017096301A1
公开(公告)日:2017-06-08
The present disclosure relates generally to methods and compositions for preventing or arresting cell death and/or inflammation.
本公开涉及一般用于预防或阻止细胞死亡和/或炎症的方法和组合物。
[EN] TARGETED DEGRADERS OF ABERRANT TAU BASED ON THE PET TRACER PBB3<br/>[FR] AGENTS DE DÉGRADATION CIBLÉS DE PROTÉINE TAU ABERRANTE SUR LA BASE DU TRACEUR DE PET PBB3
申请人:DANA FARBER CANCER INST INC
公开号:WO2021188667A1
公开(公告)日:2021-09-23
Disclosed are bispecific compounds (degraders) that target tau protein for degradation. Also disclosed are pharmaceutical compositions containing the degraders and methods of using the compounds to treat neurodegenerative and neuropsychiatric diseases associated with aberrant tau.
An exceptionally stereoselective and general synthesis of (Z)-α-haloacrylates, ready to undergo various synthetic transformations, has been demonstrated from α-haloacetates and aldehydes in a one-pot manner via the titanium-enolate based asymmetric aldol condensation. Besides being an expedient synthetic procedure, the ready availability of diverse α-haloacetates, exceptional stereoselectivity, and high yields make the process a versatile transformation in organic synthesis. The potential of this method in up-scaling operations has been illustrated.
NOVEL COMPOUNDS USEFUL AS NEAR-INFRARED FLUORESCENT PROBES SELECTIVELY BINDING TO TAU AGGREGATES AND METHOD OF PREPARING THE SAME
申请人:KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
公开号:US20210255203A1
公开(公告)日:2021-08-19
Disclosed are a compound with near-infrared fluorescence that selectively binds to tau aggregates, a method for preparing the same, a tau-targeting near-infrared fluorescent probe including the compound, a composition for detecting a tau fiber protein containing the near-infrared fluorescent probe as an active ingredient, and the use of the composition for the diagnosis of tauopathy. In particular, the compound does not bind to an amyloid beta protein and has high selectivity to a tau aggregate, specifically reported as an etiology of the initial state of tauopathy, thus being useful as a near-infrared fluorescent detector for detecting a tau fiber protein for early diagnosis of a tauopathy including Alzheimer's disease.