Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of fluorescence dye using fluorescein as matrix and application thereof

A fluorescent dye, fluorescein technology, applied in the field of new fluorescent dyes

Active Publication Date: 2014-08-27
DALIAN UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the absorption and emission wavelengths of these reported probes are still around 480nm and 520nm, respectively

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of fluorescence dye using fluorescein as matrix and application thereof
  • Preparation method of fluorescence dye using fluorescein as matrix and application thereof
  • Preparation method of fluorescence dye using fluorescein as matrix and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] Preparation of Fluorescent Dye Compound A1

[0146]

[0147] (1) Synthesis of intermediate compound 1

[0148] DCF (6.30 g, 15.75 mmol) was dissolved in a round bottom flask containing 60 mL of 50% aqueous sodium hydroxide. This mixture was stirred, heated to 165 ° C, and stirred for 1 h, the mixture became viscous. Then the mixture was added to 400mL of ice water, neutralized with 100mL of concentrated hydrochloric acid until the acidic system became cloudy, and after standing for 2 hours, it was then filtered with a Buchner funnel, and the precipitate was washed with water for 3 times. After vacuuming, it was dried under an infrared lamp to obtain a red intermediate compound 1 as a solid (8.10 g).

[0149] (2) Synthesis of intermediate compound 2

[0150] Freshly distilled cyclohexanone (6.6 mL, 63.7 mmol) was added dropwise to concentrated sulfuric acid (7.0 mL), then cooled to 0°C. Then, intermediate compound 1 (32mmol) was added to the system in batches, the...

Embodiment 2

[0154] Preparation of Fluorescent Dye Compound A 2 :

[0155]

[0156] (1) Dye Compound A 1 Synthesis

[0157] Prepare dye compound A according to the method of embodiment 1 1 . Obtained orange solid A 1(1.95 g), used as starting material for the next step without further purification.

[0158] (2) Dye compound A 2 Synthesis

[0159] Under nitrogen atmosphere, the A 1 (100mg, 0.41mmol) and malononitrile (ie vi) (40mg, 0.61mmol) were dissolved in acetonitrile (45mL, and this mixture was refluxed under nitrogen at 85°C for 4h. The reaction mixture was cooled to room temperature. Then in vacuum Solvent was distilled off under the conditions, and a dark purple solid product A was obtained on silica gel (dichloromethane as eluent: ethyl acetate=40 / 3, v / v) after purification by column chromatography 2 (0.0793g, 0.185mmol, yield 45%), R f =0.40, (5% CH 3 OH / dichloromethane). 1 H NMR (400MHz,MeOD)δ8.03(d,J=6.9Hz,1H),8.00(d,J=11.4Hz,1H),7.67–7.42(m,2H),7.10(dd,J=7.3, 1....

Embodiment 3

[0161] Preparation of Fluorescent Dye Compound A 3 :

[0162]

[0163] (1) Dye Compound A 1 Synthesis

[0164] Prepare dye compound A according to the method of embodiment 1 1 . Obtained orange solid A 1 (1.95 g), used as starting material for the next step without further purification.

[0165] (2) Dye Compound A 3 Synthesis

[0166] Under nitrogen atmosphere, the A 1 (766mg, 2.0mmol) and 2-cyanoacetic acid (vii) (813mg, 7.2mmol) were dissolved in ethanol (45mL), and then 0.2mL piperidine (3.2mmol) and 0.4mL acetic acid solution were added to the reaction system, This mixture was refluxed for 10 h at 85 °C under nitrogen. The reaction mixture was cooled to room temperature. Then distill off the solvent under vacuum conditions, and obtain dark red solid A on silica gel (eluent dichloromethane / methanol=200 / 3, v / v) after purification by column chromatography 3 (150mg, 0.33mmol, yield rate is 20%), Rf=0.30, (5% CH 3 OH / dichloromethane). 1 H NMR (400MHz,MeOD)δ8.68(...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a fluorescence dye using fluorescein as matrix, and a preparation method and application thereof. The fluorescence dye using fluorescein as maternal has the structure in general formula I. The fluorescence dye is used for biological dyeing, and simultaneously one of the dyes is applied to external and internal detections of cysteine, and meanwhile is applied to in vivo detection and other fields. The compound has a certain level of water-solubility, and simultaneously has good cell membrane permeability. The compound of the present invention simultaneously has novel spectrum characteristics, and the fluorescein derivative dyes with good properties are applied to the aspect of the fluorescence imaging.

Description

technical field [0001] The invention relates to a class of novel fluorescent dyes with fluorescein as the parent, its preparation method and application, and the detection of biological sulfhydryl compounds in vitro and in vivo by using the fluorescent probe compounds, and the application of the dyes to cell imaging and in vivo experiments. Background technique [0002] As functional pigments, fluorescent dyes have been widely used in various fields of science and technology, especially in life sciences, clinical medical diagnosis, immunoassay and detection, etc., which have attracted worldwide attention. Among many fluorescent dyes, fluorescein is a class of dyes that are widely used. This kind of dye has the advantages of large molar extinction coefficient, good photostability, and high fluorescence quantum yield. [0003] Fluorescence imaging is one of the most powerful techniques for monitoring biomacromolecules in living systems, and dyes in the near-infrared (NIR) rang...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09B57/00C09K11/06G01N1/30G01N21/64
Inventor 彭孝军熊小庆宋锋玲樊江莉王静云孙世国张玉康
Owner DALIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com