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What are the physical properties of 6-bromo-1-benzothiophene?
6-Bromo-1-benzothiophene is a kind of organic compound. It has unique physical properties and is now detailed by you.
Looking at its properties, under normal circumstances, 6-bromo-1-benzothiophene is mostly in a solid state. Due to the moderate force between molecules, the molecules are arranged in an orderly manner, so it condenses into a solid state. Its color is often off-white to light yellow, like the dim light of early morning, elegant but not ostentatious. The reason for this color is that electrons in the molecular structure absorb light of a specific wavelength, and the rest of the light is reflected, thus showing this color.
When it comes to melting point, the melting point of 6-bromo-1-benzothiophene is of great concern. At a certain temperature range, the thermal motion of the molecule intensifies enough to overcome the lattice energy, so it changes from a solid state to a liquid state. This melting point value is an important physical constant and is of great significance for the identification and purification of this substance. Accurate determination of the melting point can determine its purity. If impurities are mixed in, the melting point often decreases and the melting range becomes wider.
Solubility is also a key property. In organic solvents, 6-bromo-1-benzothiophene exhibits different solubility properties. It has good solubility in halogenated hydrocarbon solvents such as dichloromethane and chloroform. Due to the fact that van der Waals forces can be formed between halogenated hydrocarbons and 6-bromo-1-benzothiophene molecules, the interaction between the two causes them to dissolve. However, in water, its solubility is extremely poor. Because the molecule of 6-bromo-1-benzothiophene is non-polar or weakly polar, while the polarity of water molecules is extremely strong, the polarity difference between the two is very different. Due to the principle of "similar miscibility", it is difficult to dissolve in water.
The density of 6-bromo-1-benzothiophene is also a characteristic. Its density may be different from that of common organic solvents. This density property plays a guiding role in the separation and mixing process, and can be separated from other substances by means of layering according to density differences.
In addition, the stability of 6-bromo-1-benzothiophene is also worth mentioning. Under normal conditions, its structure is relatively stable. In case of high temperature, strong oxidizing agent or specific chemical reaction conditions, the molecular structure may change, and reactions such as substitution and addition occur. This is also related to its physical properties, which often affect its chemical reactivity and reaction pathway.
What is the chemistry of 6-bromo-1-benzothiophene?
6-Bromo-1-benzothiophene is also an organic compound. Its molecule contains the structure of bromine atom and benzothiophene. This unique structure gives it specific chemical properties.
In terms of reactivity, bromine atom is an important reaction check point. It has considerable nucleophilic substitution activity, and the edge bromine atom has considerable electronegativity, which can make the carbon atom connected to it partially positively charged and vulnerable to attack by nucleophilic reagents. In case of nucleophilic reagents such as hydroxyl negative ions, bromine ions can leave, and hydroxyl groups can replace them to form corresponding substitution products. This reaction often occurs more easily in alkaline environments.
Furthermore, the conjugated system of benzothiophene gives the molecule a certain stability, but also gives it the typical reaction characteristics of aromatic compounds. If an electrophilic substitution reaction can occur, the electron cloud density of the conjugated system is relatively high, making it vulnerable to electrophilic attack. Under appropriate conditions, groups such as nitro and sulfonyl can be introduced into the benzothiophene ring.
In addition, 6-bromo-1-benzothiophene can still participate in metal-catalyzed reactions. For example, under palladium catalysis, a coupling reaction occurs with a carbon-containing nucleophile, which is very important for the construction of carbon-carbon bonds. It is widely used in the field of organic synthesis and can be used to prepare organic molecules with more complex structures.
Its chemical properties are not only determined by its own structure, but also significantly affected by reaction conditions such as temperature, solvent, catalyst, etc. Appropriate regulation of the reaction conditions can make the reaction proceed smoothly in the expected direction to achieve the purpose of synthesizing specific organic compounds.
What are the common synthetic methods of 6-bromo-1-benzothiophene?
6-Bromo-1-benzothiophene is an important intermediate in organic synthesis. There are several common synthesis methods:
First, benzothiophene is used as the starting material and prepared by bromination reaction. This is a more direct method. In an appropriate reaction vessel, put benzothiophene and an appropriate amount of brominating reagents, such as bromine (Br ²) or N-bromosuccinimide (NBS). If bromine is used, benzothiophene is often dissolved in an inert organic solvent such as dichloromethane, and bromine is slowly added dropwise at low temperature and in the presence of a catalyst (such as iron powder or iron tribromide). Bromine selectively undergoes a substitution reaction at the 6-position of benzothiophene to generate 6-bromo-1-benzothiophene. The reaction process needs to be closely monitored. Due to the high bromination activity, side reactions such as polybromination are prone to occur.
Second, it is synthesized by introducing bromine atoms while constructing a benzothiophene ring. For example, using o-halogenated thiophenol and halogenated acrylate as raw materials. First, the o-halogenated thiophenol and halogenated acrylate undergo nucleophilic substitution under basic conditions to form an intermediate containing sulfur and double bonds. Subsequently, under the action of heating or a suitable catalyst, the intramolecular cyclization forms a benzothiophene structure, and the bromine atom is exactly at the 6-position. This method can effectively control the position of the substituent, but there are relatively many reaction steps, which requires high control of the reaction conditions.
Third, the coupling reaction catalyzed by transition metals. The coupling reaction of benzothiophene derivatives and brominating reagents with suitable leaving groups (such as borate groups, halogen atoms, etc.) at the 6-position is carried out in the presence of transition metal catalysts (such as palladium catalysts) and ligands. The method has the advantages of good selectivity and relatively mild reaction conditions, but the catalyst cost is high and the reaction system is relatively complex, so the reaction parameters need to be carefully optimized.
6-bromo-1-benzothiophene in what areas?
6-Bromo-1-benzothiophene, an organic compound, is used in many fields.
In the field of medicinal chemistry, it is often a key intermediate in the synthesis of many drugs. Due to its unique chemical structure, it can participate in a variety of reactions, assisting chemists in constructing molecules with specific biological activities. By chemically modifying it, new drugs with antibacterial, anti-inflammatory, anti-tumor and other effects may be prepared.
In the field of materials science, 6-bromo-1-benzothiophene is also of great interest. It can be used to synthesize optoelectronic materials, such as organic Light Emitting Diode (OLED) materials. Due to the good photoelectric properties of the benzothiophene structure, the introduction of bromine atoms may optimize the electronic transport and luminous efficiency of the material, thereby improving the performance of OLED devices.
Furthermore, in organic synthetic chemistry, it is an important synthetic block. Chemists can build complex organic molecular structures by reacting with other compounds. For example, through palladium-catalyzed cross-coupling reactions, 6-bromo-1-benzothiophene can be coupled with different aryl halides or alkenyl halides to generate benzothiophene derivatives with different substituents, expanding the structural diversity of organic compounds and laying the foundation for the creation and performance of new substances.
In summary, 6-bromo-1-benzothiophene plays a significant role in the fields of medicine, materials and organic synthesis. With the continuous progress of science and technology, its application prospects may be broader.
What is the market price of 6-bromo-1-benzothiophene?
6-Bromo-1-benzothiophene, which is a popular one in the field of organic compounds. Its market price often fluctuates up and down due to various factors, and it is difficult to give an exact value.
First discuss the purity, which is the key factor affecting its price. If the purity reaches a very high level, such as for high-end scientific research experiments or fine chemical synthesis, the price will be high due to the need for more complex and high-cost purification processes. Generally speaking, high-purity products with a purity of more than 98% may cost hundreds of yuan per gram.
Look at the market supply and demand situation. If the demand for 6-bromo-1-benzothiophene in many industries such as pharmaceutical research and development, materials science, etc. increases sharply during a certain period of time, and the supply is relatively short, following market laws, the price will rise; on the contrary, if the supply exceeds the demand, the price may decline.
In addition, differences in manufacturers and regions will also affect the price. Different manufacturers may have large differences in pricing due to differences in technical level and production costs. And different regions, due to different transportation costs and market competition, their selling prices will also vary.
Generally speaking, in the general chemical raw material market, the price per gram for lower purity products may be in the tens of yuan; while for high-purity products, the price per gram may exceed 100 yuan, or even up to hundreds of yuan. However, the market is changing, if you want to know the accurate price, you need to pay attention to the chemical product trading platform and relevant supplier quotations in real time.