Highly selective turn-on red fluorescence probes for visualization of the G-quadruplexes DNA in living cells
作者:Yongqiang Kang、Chunying Wei
DOI:10.1016/j.saa.2021.120518
日期:2022.2
Studies on small molecule fluorescent probes for detecting G-quadruplexesDNA have bring about an extensive attention in recent years. In this paper, we designed and synthesized three benzothiazole derivatives named 2a-2c under moderate reaction conditions and investigated their interactions with DNA (single-stranded, duplex, i-motif and G-quadruplex) and distribution in living cell. Three compounds
2-styryl-ethylbenzothiazolium iodides, possessing different electron-withdrawing or electron-donatinggroups are described. The dyes were prepared by the condensation of 3-ethyl-2-methylbenzothiazole salts with p-substituted benzaldehydes. The synthesis of suitable substrates is presented as well. We describe here the absorption, emission spectra and the luminescence quantum yield of hemicyanine dyes (SH) measured
electronic spectra of the chiral, donor-acceptor (push-pull) chromophores (±)-4 and (±)-5 with a 6H,12H-5,11-methanodibenzo[b,f][1,5]diazocine scaffold (Scheme 1 and Fig. 2). The electronic structures of these compounds were investigated at a quantum-chemical level (Figs. 2 and 3). The chemical reactivity of 6H,12H-5,11-methanodibenzo[b,f][1,5]diazocine ((±)-11) towards aromatic electrophilic substitution
我们报告了具有6 H,12 H -5,11-methanodibenzo [ b,f ]的手性,供体-受体(推挽)发色团(±)-4和(±)-5的合成和电子光谱。[1,5]重氮素支架(方案1和图2)。这些化合物的电子结构在量子化学水平上进行了研究(图2和3)。6 H,12 H -5,11-甲二苯并[ b,f ] [1,5]重氮电影((±)-11)对芳族亲电子取代的化学反应性(方案2和表1)提供了有关其电子结构的更多信息,并证实了在该杂环系统中桥头N原子的孤对的不可忽略的离域。
Compounds, compositions and methods for generating chemiluminescence with phosphatase enzymes
申请人:——
公开号:US20030023089A1
公开(公告)日:2003-01-30
Novel heterocyclic compounds which generate chemiluminescence on reaction with a phosphatase enzyme are provided as well as a process for their preparation and intermediates useful therein. The compounds comprise a nitrogen, oxygen or sulfur-containing heterocyclic ring system bearing an exocyclic carbon-carbon double bond. The double bond is further substituted at the distal carbon with a phosphate group and an oxygen or sulfur atom-containing group.
Novel compositions further comprising a cationic aromatic compound (CAC) in addition to the heterocyclic phosphate compound are provided. The addition of the CAC in the composition greatly increases the production of chemiluminescence and provides improved detection sensitivity. Compositions further comprising an anionic surfactant and a non-ionic surfactant provide additional improvements in detection sensitivity. The novel chemiluminescent compounds and compositions are useful in methods for producing light and in assays for phosphatase enzymes and enzyme inhibitors and in assays employing enzyme-labeled specific binding pairs.
A reagent for detecting malaria infected cells and a detecting method for malaria infected cells using the same
申请人:TOA MEDICAL ELECTRONICS CO., LTD.
公开号:EP0613003A1
公开(公告)日:1994-08-31
A reagent for staining malaria infected cells and a method for detecting malaria infected cells using the same, wherein the regent is a staining solution comprising at least one first dye of an Auramine analogue having the formula (I):
wherein R₁ to R₆ represents a hydrogen atom, or a methyl or ethyl group, X₁ represents a halogen atom, and at least one second dye of a condensed benzene derivative having the formula (II):
wherein A represents 〉O, 〉S or
R represents a C₁₋₆ alkyl group, X₂ represents a halogen atom, Y represents -CH= or -NH-, n represents 0 or 1, and B represents
or a phenyl group substituted with 2 lower alkoxy group or with 1 di-lower alkylamino group to stain malaria infected cells; and (2) optically detecting stained malaria infected cells.
一种用于对受疟疾感染的细胞进行染色的试剂,以及使用该试剂检测受疟疾感染的细胞的方法,其中所述试剂为染色液,包含至少一种具有式(I)的金曙红类似物的第一染料:
其中 R₁ 至 R₆ 代表氢原子或甲基或乙基,X₁ 代表卤原子,以及至少一种具有式 (II) 的缩合苯衍生物的第二染料:
其中 A 代表〉O、〉S 或
R 代表 C₁₋₆烷基,X₂ 代表卤素原子,Y 代表 -CH= 或 -NH-,n 代表 0 或 1,以及 B 代表
或被 2 个低级烷氧基或 1 个二低级烷基氨基取代的苯基,以染色疟疾感染细胞;以及 (2) 用光学方法检测染色的疟疾感染细胞。