4-(p-tolylthio)thieno[2,3-c]pyridine-2-carboxylic acid

This is the chemical structure of 4 - (p-toluene thio) thiopheno [2,3 - c] pyridine-2 - carboxylic acid. This compound is composed of the core structure of thiophenopyridine and specific substituents.
Looking at its core, thiophenopyridine structure is formed by fusing thiophene ring with pyridine ring. The thiophene ring is a sulfur-containing five-membered heterocycle with aromatic properties and unique electron cloud distribution, which affects the electronic properties and chemical reactivity of molecules. The pyridine ring is a nitrogen-containing six-membered heterocycle. The solitary pair electrons of the nitrogen atom make the pyridine have certain basic and nucleophilic properties. The thiophenopyridine structure formed by the fused combination of the two exhibits unique chemical and physical properties.
In this compound, there is a p-toluene thio group at the 4th position. The p-toluene group is a group substituted by methyl in the para-position of the benzene ring, which has electron-inducing effects and superconjugation effects, which can affect the electron cloud density distribution of the molecule. The sulfur atom is connected to the core structure of p-toluene and thiophenopyridine, and the outer electron of the sulfur atom is rich, which can participate in a variety of chemical reactions, such as nucleophilic substitution, redox, etc. The introduction of
Furthermore, there is a carboxyl group attached at position 2. The carboxyl group is a strong electron-absorbing group, which is acidic and can undergo acid-base reactions, esterification reactions, etc. Its existence makes the molecule have a certain polarity, which affects the solubility, stability and interaction with other molecules of the compound.
The chemical structure of 4- (p-toluene thio) thiopheno [2,3-c] pyridine-2-carboxylic acid has important research value in the fields of organic synthesis and medicinal chemistry due to the interaction of each group.

4- (p-toluenthio) thiopheno [2,3-c] pyridine-2-carboxylic acid, which is an organic compound. In the context of "Tiangong Kaiwu", although it is not directly described, some physical properties can be inferred by the method of ancient people studying physical properties.
Looking at its morphology, such organic compounds are often crystalline solids. Due to the orderly arrangement of intermolecular forces, they form a regular lattice structure at room temperature and pressure. The texture is either fine powder or tiny crystals, and it feels dry to touch or feel.
When it comes to color, according to the general nature of organic chemistry, compounds containing complex conjugated systems often have color. This compound contains thiophene and pyridine heterocycles, and has p-toluene thio substituents, or is light yellow to light brown, because the conjugated system can absorb visible light of specific wavelengths, thus showing color.
Smell its smell, sulfur-containing organic compounds have a special smell. The presence of p-toluene thio groups may make the compound emit a pungent and unpleasant smell, or have a special smell similar to thiols and thioethers, but the exact smell needs to be determined by smelling it yourself.
Its melting point is also an important physical property. The melting point of organic compounds is affected by molecular structure, molecular weight, and intermolecular forces. This compound has a certain rigidity due to the interaction of van der Waals forces and hydrogen bonds between molecules, and its melting point may be in a specific range. It is inferred by similar structural compounds that the melting point may be between 150 ° C and 250 ° C, and it needs to be accurately determined by experiments.
In terms of solubility, according to the principle of similar miscibility, the compound is an organic molecule with certain hydrophobicity and little solubility in water. However, in organic solvents, such as dichloromethane, chloroform, N, N-dimethylformamide (DMF), etc., because the molecule and organic solvent can form similar intermolecular forces, the solubility may be high, which is convenient for application in organic synthesis, separation and purification.

4 - (p-toluenthio) thiopheno [2,3 - c] pyridine-2 - carboxylic acid, which is widely used. In the field of pharmaceutical research and development, it is often a key intermediate, or can help create new specific drugs. Because the compound has a unique chemical structure and activity, it may exhibit high affinity and selectivity for specific biological targets, and then play a therapeutic role in some diseases.
In the field of materials science, it also has potential application value. With its own special structure, it may be modified and processed to give materials specific properties. For example, it may improve the stability, conductivity or optical properties of materials, and make a difference in electronic devices, optical materials, etc.
In addition, in the field of organic synthesis, it is often used as an important synthetic building block. Chemists can use various chemical reactions to build more complex organic molecular structures, expand the types and functions of organic compounds, and provide an important cornerstone for exploring new substances and properties.

The synthesis of 4 - (p-toluenthio) thiopheno [2,3 - c] pyridine-2 - carboxylic acid has been studied by chemists throughout the ages. One of the common methods is to use compounds containing thiophene and pyridine structures as starting materials. First, the thiophene-containing compound is nucleophilic substitution with a specific halogenated aromatic hydrocarbon, such as p-toluenyl halide, in the presence of an appropriate base and catalyst. This process requires fine regulation of the reaction temperature, time and ratio of reactants. Potassium carbonate, sodium carbonate and the like are commonly used for alkalis, and the catalyst can be selected as cuprous iodide, palladium catalyst, etc. Through this reaction, p-toluenthio can be introduced into the thiophene structure.
Then, the obtained intermediate product is constructed of a pyridine ring. Or by cyclization reaction, such as under the action of suitable reagents, the specific group in the molecule is condensed and cyclized to form a thiopheno [2,3-c] pyridine structure. This step requires attention to the influence of reaction conditions on cyclization selectivity, and the choice of temperature and solvent is very critical. Solvents such as dichloromethane, N, N-dimethylformamide, etc. are commonly used to provide a suitable reaction environment.
Furthermore, the constructed thiopheno [2,3-c] pyridine structure is carboxylated. The target product 4- (p-toluene thio) thiopheno [2,3-c] pyridine-2-carboxylic acid can be obtained by reacting with carbon dioxide under specific conditions or using other carboxylating reagents, such as halocarboxylic acid esters, through hydrolysis and other steps. This series of reactions requires fine operation and strict control of the reaction conditions in order to improve the yield and purity of the product.

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