可溶形式的聚集 tau 错误折叠蛋白(通常称为寡聚物)被认为是神经退行性疾病病理成分不同组装状态中毒性最强的物种。因此,生物医学界迫切需要能够识别和量化它们的成像探针。我们设计并合成了一种新型荧光探针pTP-TFE ,评估了其对聚集 tau 和 Aβ 蛋白的结合和选择性特征。我们的结果表明,pTP-TFE对早期形式的可溶性 tau 聚集体具有选择性,解离常数 ( K d ) = 66 nM具有高亲和力,选择性是成熟 tau 原纤维的十倍。此外,我们发现pTP-TFE对 tau 蛋白的选择性优于 Aβ 聚集体,并且具有良好的细胞通透性。pTP-TFE对早期形式的体外聚集 tau 蛋白的选择性也得到了对含有 tau 和 Aβ 病理学的人脑组织的研究的支持。据我们所知,这是第一个被报道具有这种形式选择性特征的荧光分子,这表明pTP-TFE是一种独特的候选探针,用于基于成像的阿尔茨海默病和其他 tau蛋白病的早期阶段检测。
This disclosure relates to materials and methods for inhibiting Botulinum neurotoxin, and more particularly to materials and methods for inhibiting the zinc endopeptidase of Botulinum neurotoxin serotypes A, D and/or E (BoNTA, BoNTD and/or BoNTE).
USEFUL THIOPHENE DERIVATIVES IN THE TREATMENT OF DIABETES
申请人:METABRAIN RESEARCH
公开号:US20150197530A1
公开(公告)日:2015-07-16
The present invention relates to a thiophene derivative of the following general formula I
or an enantiomer, diastereoisomer, hydrate, solvate, tautomer, racemic mixture or pharmaceutically acceptable salt thereof or to its use as a drug in particular intended for treating and/or preventing diabetes, its complications and/or associated pathologies, advantageously diabetes of type II and hyperglycemia.
Useful thiophene derivatives in the treatment of diabetes
申请人:METABRAIN RESEARCH
公开号:US09777015B2
公开(公告)日:2017-10-03
The present invention relates to a thiophene derivative of the following general formula I
or an enantiomer, diastereoisomer, hydrate, solvate, tautomer, racemic mixture or pharmaceutically acceptable salt thereof or to its use as a drug in particular intended for treating and/or preventing diabetes, its complications and/or associated pathologies, advantageously diabetes of type II and hyperglycemia.
We
have achieved the stepwise synthesis of 3-substituted thienylzinc reagents using both electrochemical methods
and an original bromination procedure. For several compounds 3-bromothiophene was the starting substrate,
which was functionalized according to recently developed electrochemical procedures. The nickel-catalyzed electrochemical
reduction of the resulting 3-substituted 2,5-dibromothiophenes in the presence of zinc salts allowed the formation
of monothienylzinc species in good yields. The selectivity of this reaction
is discussed within the context of the electrochemical synthesis of regioregular polythiophenes.
Regiocontroled Pd-catalysed C5-arylation of 3-substituted thiophene derivatives using a bromo-substituent as blocking group
作者:Mariem Brahim、Hamed Ben Ammar、Jean-François Soulé、Henri Doucet
DOI:10.3762/bjoc.12.210
日期:——
C5-position via Pd-catalyseddirectarylation. With 1 mol % of a phosphine-free Pd catalyst, KOAc as the base and DMA as the solvent and various electron-deficient aryl bromides as aryl sources, C5-(hetero)arylated thiophenes were synthesized in moderate to high yields, without cleavage of the thienyl C-Br bond. Moreover, sequential direct thienyl C5-arylation followed by Pd-catalyseddirectarylation or Suzuki