CN110590764B - Structure, preparation and application of 2-thiazole formaldehyde-4-pyridine Schiff base - Google Patents

Structure, preparation and application of 2-thiazole formaldehyde-4-pyridine Schiff base Download PDF

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CN110590764B
CN110590764B CN201910941041.3A CN201910941041A CN110590764B CN 110590764 B CN110590764 B CN 110590764B CN 201910941041 A CN201910941041 A CN 201910941041A CN 110590764 B CN110590764 B CN 110590764B
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thiazole
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pyridine
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谭学杰
刘帅
邢殿香
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Qilu University of Technology
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Abstract

The invention relates to the fields of organic synthesis, optical materials, pharmaceutical chemistry and the like, in particular to a structure, a preparation method and partial properties of a compound crystal; this compound appears as yellow blocky crystals with a melting point: 145.5-146.0 deg.C, molecular formula C 10 H 8 N 4 S, the chemical name is: 2- ((E) - (((E) -pyridin-4-ylmethylene) hydrazono) methyl) thiazole; the structure of the compound is detailed in the specification, and the compound has certain fluorescence property and anticancer activity.

Description

Structure, preparation and application of 2-thiazole formaldehyde-4-pyridine Schiff base
Technical Field
The invention relates to the fields of organic synthesis, optical materials, pharmaceutical chemistry and the like, and a target product is synthesized by a simple method in one step. Its advantages are novel structure, simple process, high purity and high output rate.
Background
At present, with the continuous progress of modern science and technology, people have more and more researches on fluorescence and the fluorescence property of the fluorescence. The fluorescent substance is widely applied to the fields of dyes, organic pigments, optical brighteners, photo-oxidizers, coatings, chemical and biochemical marking analysis, solar collectors, anti-counterfeiting marks, medicine tracing, lasers and the like. The organic fluorescent material is mainly used in the current popular technologies, such as fluorescent probes, fluorescence analysis and the like, and is an indispensable material for optical electronic devices, DNA diagnosis, photochemical sensors, laser dyes and organic electroluminescent devices.
Schiff bases are mainly organic compounds containing imine or azomethine characteristic groups (-RC ═ N-), and are usually formed by condensation of amines and active carbonyl groups. Schiff base compounds and metal complexes thereof have important application in the fields of medicine and pharmacology, catalysis, analytical chemistry, corrosion and photochromism. In the medical field, Schiff base has biological activities of bacteriostasis, sterilization, anti-tumor and antivirus; in the field of catalysis, complexes of cobalt, nickel and palladium of schiff bases have been used as catalysts; in the field of analytical chemistry, Schiff bases are used as good ligands and can be used for identifying and identifying metal ions and quantitatively analyzing the content of the metal ions; in the corrosion field, certain aromatic schiff bases are often used as corrosion inhibitors for copper; certain schiff bases containing characteristic groups also have unique applications in the field of photochromism.
Disclosure of Invention
The invention relates to a compound which can be used as fluorescent material and anticancer drug, wherein the compound is yellow bulk crystal with melting point: 145.5-146.0 deg.C, molecular formula C 10 H 8 N 4 S, the chemical name is: 2- ((E) - (((E) -pyridin-4-ylmethylene) hydrazono) methyl) thiazole, having the structure:
Figure BDA0002222882470000011
1. and (3) structure identification:
elemental analysis showed that this compound has the formula C 10 H 8 N 4 S, molecular weight 216.05; elemental analysis results (%): experimental values: c,55.60, H,3.72, N,25.89, S, 15.01; theoretical value: c,55.54, H,3.73, N,25.91, S, 14.82; the analysis of the single crystal structure shows that the crystal belongs to a monoclinic system, the space group is P21/n,
Figure BDA0002222882470000021
β=110.499(8)°,
Figure BDA0002222882470000022
z is 4; in connection with 1 The HNMR spectrum is shown in figure 1; FIG. 2 and FIG. 3 are a thermal ellipsoid crystal structure diagram and a crystal structure stacking diagram of the compound, respectively.
2. A synthetic method.
The method I is characterized in that: taking (E) -2- (hydrazono) thiazole and 4-pyridine-formaldehyde as raw materials, and completing the preparation in one step in a proper organic solvent. The method comprises the following steps:
1) dissolving all (E) -2- (hydrazono) thiazole in a proper organic solvent, adding 4-pyridine-formaldehyde according to a certain substance amount ratio, and stirring or grinding at a certain temperature for reacting for several hours.
2) Filtering, and naturally volatilizing the filtrate to separate out yellow blocky crystals which are target products; if solid phase reaction is adopted, the target product crystal can be obtained by recrystallization with proper organic solvent after the reaction is finished
The second method is characterized in that: taking (E) -2- (hydrazono) thiazole and 4-pyridine-formaldehyde as raw materials, and completing the steps in a proper organic solvent in one step, wherein the steps comprise:
1) dissolving 4-pyridine-formaldehyde in a proper organic solvent, adding (E) -2- (hydrazono) thiazole according to a certain substance amount ratio, and stirring or grinding at a certain temperature for reaction for several hours to complete the preparation.
2) Filtering, and naturally volatilizing the filtrate to separate out orange blocky crystals which are target products; if solid phase reaction is adopted, the target product crystal can be obtained by recrystallization with proper organic solvent after the reaction is finished.
The two above processes differ in the order of addition of the reactants, but the molar ratio of the reactants is between 1:4 and 4: 1.
The organic solvent (including the solvent for reaction and the solvent for recrystallization) in the above two methods is selected from: methanol, ethanol, acetonitrile, dichloromethane, chloroform, tetrahydrofuran, acetone, etc., and the reaction may be carried out without using an organic solvent, but the raw materials may be reacted directly (solid phase reaction).
Preferably, the reaction temperature is normal temperature or heating reflux, and the reaction method is stirring or grinding.
Preferably, the reaction time is selected from: 1-10 h.
The beneficial effects of the invention are: can synthesize more complex functional molecular materials by simpler steps and reactants.
3. UV and fluorescent properties
The compound has two strong absorption peaks near 252.0nm and 324.0nm, and the ultraviolet spectrum is shown in figure 4; has strong fluorescence emission peak in the range of 350.0-450.0nm, and the fluorescence spectrum is shown in figure 5; this indicates that the compound has better fluorescence properties.
4. In vitro antitumor activity:
respectively digesting A549 lung cancer cell, A375 human malignant melanoma cell and HeLa cervical cancer cell in logarithmic phase with 0.25% pancreatin to obtain single cells, and preparing into 1.25 × 10 concentration by using F12K culture solution containing 10% fetal calf serum 7 One cell/L suspension of single cells, cells were seeded in 96-well plates at 200. mu.L per well (2.5X 10 per well) 3 Individual cells). Place 96-well cell culture plates in CO 2 In an incubator at 37 ℃ with 5% CO 2 Culturing for 48h under the condition.
When the cells in the wells are full (90% full), adding different doses of the Schiff base solution (200 muL/well) according to experimental groups to make the final concentration of the compound to be detected respectively 12.5 muM, 25 muM, 50 muM, 100 muM, 200 muM and 400 muM, setting 3 multiple wells in each group, and culturing for 96 h.
mu.L of MTT at a concentration of 0.5g/L was added to each well, and the cells were further cultured for 4 hours to reduce MTT to Formazan (Formazan). After all the supernatants were aspirated, 200. mu.L of DMSO was added to each well, and the mixture was shaken for 15min to dissolve formazan sufficiently, and then absorbance (OD value) at 490nm was measured using an ELISA detector. Then calculated according to the following formula:
percent cell inhibition (control OD value-experimental OD value)/control OD value × 100%
Test results show that IC50 (half inhibition concentration of the drug) of the Schiff base on A549 lung cancer cells, A375 human malignant melanoma cells and HeLa cervical cancer cells is 450, 262 and 348 mu mol/L respectively, and the Schiff base has weak inhibition effects on the three cancer cells.
Detailed Description
For better understanding of the present invention, the technical solution of the present invention is further illustrated by a specific example below:
example 1
0.1270g (about 1mmol) of (E) -2- (hydrazono) thiazole was weighed out and dissolved in 50ml of acetonitrile, the solution was put into a flask, and stirred on a constant temperature heating magnetic stirrer, 188. mu.L (about 2mmol) of 4-pyridine-carbaldehyde was added to the solution by a pipette, and the reaction was stirred under reflux for 2 hours. Gradually changing the solution into yellow, filtering after the reaction is finished, standing the filtrate, and naturally volatilizing; the yellow crystal is precipitated from the bottom of the beaker, and is the target product, and the yield is about 82%.
Drawings
FIG. 1 is a schematic representation of 2- ((E) -pyridin-4-ylmethylene) hydrazono) methyl) thiazole 1 HNMR spectrogram (DMSO-D) 6 )。
FIG. 2 is a crystal structure diagram of 2- ((E) - ((((E) -pyridin-4-ylmethylene) hydrazono) methyl) thiazole.
FIG. 3 is a graphic representation of the crystal structure of 2- ((E) - (((E) -pyridin-4-ylmethylene) hydrazono) methyl) thiazole.
FIG. 4 is a UV spectrum of 2- ((E) - (((E) -pyridin-4-ylmethylene) hydrazono) methyl) thiazole (10) - 5 mol/L,CH 2 CL 2 )。
FIG. 5 is a fluorescence spectrum (10) of 2- ((E) -pyridin-4-ylmethylene) hydrazono) methyl) thiazole - 5 mol/L,CH 2 CL 2 )。

Claims (3)

1. A compound which appears as yellow bulk crystals having a melting point: 145.5-146.0 deg.C, molecular formula C 10 H 8 N 4 S, the chemical name is: 2- ((E) -pyridin-4-ylmethylene) hydrazono) methyl) thiazole, having the structure:
Figure FDA0003794990140000011
the crystal belongs to monoclinic system, space group is P21/n,
Figure FDA0003794990140000012
Figure FDA0003794990140000013
β=110.499(8)°,
Figure FDA0003794990140000014
Z=4。
2. a method of synthesizing a compound as claimed in claim 1, characterized in that: the (E) -2- (hydrazono) thiazole and 4-pyridine-formaldehyde are taken as raw materials, and liquid phase synthesis or solid phase synthesis can be adopted:
1) if a liquid phase synthesis method is adopted, dissolving all (E) -2- (hydrazono) thiazole in methanol, ethanol, acetonitrile, dichloromethane, chloroform, tetrahydrofuran or acetone organic solvents, adding 4-pyridine-formaldehyde according to the mass ratio of 1:4 to 4:1, stirring for 1-10 h at normal temperature or at the reflux temperature, filtering, and naturally volatilizing the filtrate to precipitate yellow blocky crystals, namely the target product;
2) if the solid-phase synthesis method is adopted, the two reaction raw materials are mixed according to the mass ratio of 1:4 to 4:1, then grinding reaction is carried out for 1-10 h at normal temperature, and then methanol, ethanol, acetonitrile, dichloromethane, chloroform, tetrahydrofuran or acetone organic solvent is used for recrystallization, thus obtaining the target product crystal.
3. Use of a compound as claimed in claim 1, or a pharmaceutically acceptable salt thereof, for the manufacture of a medicament for the treatment of tumours, wherein: the tumor is lung cancer, malignant melanoma or cervical cancer.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102295640A (en) * 2011-06-29 2011-12-28 南京工业大学 3-heterocyclic Schiff base-5-fluoro-indole-2-ketone compound and preparation method and application thereof
CN110229119A (en) * 2019-05-21 2019-09-13 辽宁科技大学 A kind of synthesis and application method of the benzothiazole bis-Schiff base fluorescent molecular probe for iron ion detection

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102295640A (en) * 2011-06-29 2011-12-28 南京工业大学 3-heterocyclic Schiff base-5-fluoro-indole-2-ketone compound and preparation method and application thereof
CN110229119A (en) * 2019-05-21 2019-09-13 辽宁科技大学 A kind of synthesis and application method of the benzothiazole bis-Schiff base fluorescent molecular probe for iron ion detection

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"Ag(I) Complexes Generated from Double Schiff-Base Ligand with Thiazole as the Terminal Binding Sites";Yu-Bin Dong等;《CRYSTAL GROWTH & DESIGN》;20061231;第6卷(第11期);全文 *
"Synthesis and Biological Evaluation of Benzo[d]isothiazole,Benzothiazole and Thiazole Schiff Bases";Paola Vicini等;《Bioorganic & Medicinal Chemistry》;20031231(第11期);全文 *
"新型吲哚类席夫碱的合成、结构表征及抗癌活性研究";卜凡志;《中国优秀硕士学位论文全文数据库 工程科技I辑》;20180415(第04期);全文 *

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