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What is the main use of 5-bromo-2-cyano-3-fluoropyridine?
5 + - 2 - naphthyl - 3 - is used for its main purpose to produce various important chemical compounds and materials.
, in the chemical industry, it can be used as an important part of the synthesis. In terms of 2 - naphthyl - 3 -, it has many properties.
First, it can be used in dye synthesis. Because of its special chemical properties, it can be used to introduce various color groups from specific chemical reactions to synthesize dyes with high color and high performance. These dyes are suitable for use in manufacturing, printing and dyeing, etc., to make the dyes rich in color.
Second, it also has important uses in the research and manufacture of chemical compounds. The chemical properties of 2-naphthyl-3-can make it an important component of the building blocks of chemical molecules. Through rational molecular modification, compounds with specific biological activities can be obtained, which can be used for the treatment of many diseases, such as the research of some anti-tumor and anti-infective compounds.
Third, in the field of materials, 5 + - 2-naphthyl-3-can be used to synthesize polymer materials with special properties. For example, its introduction into polymer can change the material's qualitative, mechanical, and optical properties, etc. This material may be used in sub-devices, optical materials, and other fields, such as manufacturing high-performance optical diode (OLED) materials to improve their optical efficiency.
What are the synthesis methods of 5-bromo-2-cyano-3-fluoropyridine
5-Naphthyl-2-naphthyl-3-methoxy is synthesized as follows:
First, the naphthalene is used as a starting material. First, the naphthalene is sulfonated and reacted under the appropriate conditions, and a sulfonic acid group is introduced. This sulfonic acid group can be used as a positioning group in the reaction. Subsequently, the sulfonic acid group is reacted to the sulfonic acid group to obtain a naphthalene derivative containing a naphthalene group. And, using the alkylation of the alkyl group, such as alkanes, under the action of the catalytic catalyst, a methoxy group is introduced. The most important, through the clever oxidation reaction or other functional reaction reaction, the required other functionalities are introduced at a specific location to obtain the target compound 5-2-naphthyl-3-methoxy compound.
Second, the phenol compound can be produced. First, the phenol group is protected to prevent the reaction in the reaction. Then, the nucleus is used to replace the reaction, and the substituent of the phenol is introduced on the phenol to build a carbon skeleton like the phenol. And then, the phenol group is released. Next, the naphthalene part is gradually introduced in a specific synthetic way. It can be reversed by Friedel-Crafts and the like, and the fragment containing naphthyl group can be compared to the existing phenol derivative skeleton phase. Most, the methoxy group is introduced again by alkylation inversion, and the synthesis of the target compound is completed.
Third, with some natural compounds or synthesized starting materials that have similar functions. For example, if the starting material contains functional compounds that can be oxidized or original, it can be oxidized or original to reduce the required functional properties of the target compound. If the substituent positions of the starting material do not match, the position of the substituent can be adjusted by means of rearrangement inversion. Through multi-step careful purification, 5-2-naphthyl-3-methoxy compounds are gradually obtained.
What are the physical properties of 5-bromo-2-cyano-3-fluoropyridine
Mercury is a liquid at room temperature and is the only liquid metal. It is silver-white in color and has a metallic luster. Mercury has a high density, about 13.6 times that of water, so it sinks in water.
Mercury has an extremely low melting point, minus 38.87 degrees Celsius, and a boiling point of 356.6 degrees Celsius. This property makes mercury volatile in ordinary environments and dispersed into the air.
Its chemical properties are relatively stable, and it does not react with oxygen at room temperature. However, when heated, it can combine with oxidation to form mercury oxide. Mercury can form an alloy with many metals, called amalgam.
Mercury is toxic. If the human body inhales mercury vapor or accidentally eats mercury-containing substances, it can cause serious health damage, injuring the nervous system, kidneys and other organs. Mercury is mostly stored in the placer in the form of mercury sulfide in nature. When extracting mercury, it is often heated to decompose mercury into cinnabar.
In ancient times, mercury was often used in alchemy. Warlocks believed that it had magical effects and could help people prolong life. In fact, due to the toxicity of mercury, it was not harmful to life. And because of its liquid flow and silver-white color, it was also used to make some special utensils and decorations. Nowadays, although mercury is known to be toxic, it is still used in specific industrial fields, such as the manufacture of thermometers, sphygmomanometers, and other instruments. Only careful operation is required to prevent mercury leakage from causing environmental pollution and human hazards.
What are the precautions for storing and transporting 5-bromo-2-cyano-3-fluoropyridine?
Mercury is very toxic. During storage and transportation, many things must be observed.
Mercury is volatile, and its vapor is toxic. Therefore, the storage device must be tightly sealed to prevent escape. It should be placed in a cool and ventilated place, protected from heat and light, to prevent its accelerated volatilization due to changes in temperature and light. And the storage place should be far away from human settlements to prevent accidental leakage and endanger everyone.
When transporting mercury, the packaging must be solid and reliable. In a special container, the container must be corrosion-resistant and pressure-resistant to ensure that it does not leak during the journey. Escorts should be familiar with the characteristics of mercury and emergency disposal methods, and often inspect on the way to check whether the packaging is damaged or whether there is any leakage of mercury. In case of leakage, do not panic, and quickly cover it with sulfur powder, because mercury and sulfur can be quickly synthesized into mercury sulfide, and the toxicity is greatly reduced. And quickly evacuate the surrounding people and report it to the relevant government for proper disposal.
In addition, mercury can form amalgam when it encounters metals, so the equipment used for storage and transportation should not be made of metals that are easy to react with mercury. And the storage amount of mercury should be limited according to the law, and it should not be stored too much, which will cause hidden dangers.
In short, the storage and transportation of mercury is related to the safety of everyone, and it must be done in accordance with the law, with caution, and without slack in order to ensure safety.
What is the approximate market price of 5-bromo-2-cyano-3-fluoropyridine?
Looking at the present world, I ask what the market price of 5 + nonwater-2-decyl-3-heptyl is. Because the market is diverse and the value of things is impermanent, it is difficult to determine the price of such things.
However, according to the past and the current situation, 5 + nonwater is unique in its nature and involves various uses, so its price is not low. And 2-decyl and 3-heptyl things also have their corresponding values because of their quality and use. < Br >
or taking into account the transactions of the same industry, the price of 5 + nonwater may be between [X1] and [X2]. This is an approximate number, and it also varies with the supply and demand of the city and the amount of production. 2-Decyl, depending on its purity and quality, its price is about [Y1] to [Y2]. As for the 3-heptych, according to its precision and applicability, the price is between [Z1] and [Z2].
It is necessary that the market is not constant, and the price is not fixed. This is the value of speculation. The actual price still needs to be carefully considered according to the specific situation of the time, the market, and the thing before it can be determined.