The hitherto unknown 6-dimethylaminobenzothiazole-2-carbaldehyde was prepared as a starting compound for the synthesis of novel push-pull benzothiazole derivatives with reverse polarity. These compounds are substituted at the 2-position by strong electron-acceptor groups and at the 6-position by NMe2 as strong electron-donor. The new method for synthesis of 6-dimethylaminobenzothiazole involved the successful use of sonochemical reductive methylation. Expected non-linear optical properties of target molecules were studied by EFISH method.
Fluorescent probe and preparation method and use thereof
申请人:Fluorescence Diagnosis (shanghai) Biotech Company Ltd.
公开号:US11209437B2
公开(公告)日:2021-12-28
Provided are a fluorescent probe and a preparation process and the use thereof. The fluorescent probe is sensitive and specific to viscosity, and can be used for specific fluorescent labeling of proteins, and can also be used for quantification, detection or kinetic studies of proteins, and the imaging of cells, tissues and living bodies.
We synthesized push-pull benzothiazole derivatives and evaluated their potential as beta-amyloid imaging probes. In binding experiments in vitro, the benzothiazoles showed excellent affinity for synthetic A beta(1-42) aggregates. beta-Amyloid plaques in the mouse and human brain were clearly visualized with the benzothiazoles, reflecting the results in vitro. These compounds may be a useful scaffold for the development of novel PET/SPECT and fluorescent tracers for detecting beta-amyloid in Alzheimer's brains. (C) 2009 Elsevier Ltd. All rights reserved.
Paper Strip-based Fluorometric Determination of Cyanide with an Internal Reference
作者:Dong-Nam Lee、Hyejin Seo、Ik-Soo Shin、Jong-In Hong
DOI:10.1002/bkcs.10863
日期:2016.8
Michael‐type addition of cyanide at the electrophilic β‐positions of the nitrile groups, resulting in the marked emergence of a peak at λem = 515 nm. The developed probe was successfully applied to a paper test strip because of its noticeable optical changes upon reaction with cyanide. The fabricated dumbbell‐shaped paper strip with an internal reference allowed the cyanide detection, which is indispensable
Deposits of β-amyloid (Aβ) and α-synuclein (α-syn) are the hallmark of Alzheimer’sdisease (AD) and Parkinson’sdisease (PD), respectively. The detection of these protein aggregates with fluorescentprobes is particularly of interest for preclinical studies using fluorescence microscopy on human brain tissue. In this study, we newly designed and synthesized three push–pull benzothiazole (PP-BTA) derivatives
β-淀粉样蛋白(Aβ)和α-突触核蛋白(α-syn)的沉积物分别是阿尔茨海默氏病(AD)和帕金森氏病(PD)的标志。对于使用荧光显微镜在人脑组织上进行的临床前研究而言,使用荧光探针检测这些蛋白质聚集体尤为重要。在这项研究中,我们新设计并合成了三种推挽式苯并噻唑(PP-BTA)衍生物作为荧光探针,用于检测Aβ和α-syn聚集体。与溶液中的Aβ(1-42)和α-syn聚集体结合后,所有PP-BTA衍生物的荧光强度均显着增加。在体外饱和结合测定中,PP-BTA衍生物表现出对Aβ(1-42)(K d = 40-148 nM)和α-syn(K d)的亲和力= 48–353 nM)聚集。尤其是,PP-BTA-4在AD脑切片中清楚地染色了由Aβ聚集体组成的老年斑。此外,它还在PD脑区域标记了由α-syn聚集体组成的路易体。这些结果表明,PP-BTA-4可以作为检测Aβ和α-syn聚集体的有前途的荧光探针。