2-iodopyridine

2-%E7%A2%98%E5%90%A1%E7%9A%84%E7%89%A9%E7%90%86%E6%80%A7%E8%B4%A8%E5%A6%82%E4%B8%8B%EF%BC%9A
This device is strong and rigid. Its quality is well-made and refined by a special method, so it has extraordinary strength. It can withstand great strength without folding, and it will not bend under heavy pressure. If compared with gold and stone, gold and stone may be brittle and fragile, but this device is both rigid and tough, just like the quality of stainless steel, but it is even better.
Furthermore, its corrosion resistance is also a must. Ordinary things, wet in water, wind and rain, will rust for a long time and gradually lose their shape. However, 2-%E7%A2%98%E5%90%A1%, they are not afraid of rain and dew, and they are not afraid of frost and snow. Even if they are placed in a bad environment, they can still maintain their original appearance and brilliance after a long time.
In addition, the heat resistance of this device is outstanding. The flame is roasted, fumigated at high temperature, and the general utensils are deformed or melted, unable to withstand its heat. And 2-%E7%A2%98%E5%90%A1%, under high temperature, it is as stable as Mount Tai, its shape remains unchanged, and its quality is not damaged. It seems to be able to resist the fire and stick to its own state.
And its conductivity is quite good. If it conducts current, the current will flow unimpeded, such as the water of the river rushing down, and the loss is extremely small. Compared with other things, or the resistance is too large, causing the current to be poor, and this device can make the electrical efficiency fully play, which is really beneficial for electrical use.
In addition, 2-%E7%A2%98%E5%90%A1% still has good plasticity. Craftsmen can shape it into various shapes according to their needs, whether it is exquisite or grand, providing infinite possibilities for the display of various skills.

2-%E7%A2%98%E5%90%A1%E5%95%B6%E4%B8%BB%E8%A6%81%E6%9C%89%E5%93%AA%E4%BA%9B%E5%8C%96%E5%AD%A6%E5%90%88%E6%88%90%E6%96%B9%E6%B3%95%EF%BC%9F%3F
Answer: To make 2-%E7%A2%98%E5%90%A1, it is often done by counting. First, it starts with alkenes and is obtained by a specific reaction. Ethenes and appropriate reagents can form this target in an environment suitable for temperature, pressure and catalysis. For example, an alkene and a halide, with the help of a catalyst, initiate an addition reaction, and then through subsequent conversion, 2-%E7%A2%98%E5%90%A1 can be obtained.
Second, alcohol is based. Alcohols can also achieve this purpose by oxidation, substitution and other reactions. First, the alcohol is oxidized to an aldehyde or a ketone, and then reacted with a specific reagent. After a series of delicate transformations, 2-%E7%A2%98%E5%90%A1 can be obtained.
Third, esters are used as raw materials. Esters are hydrolyzed under basic or acidic conditions to form corresponding acids or alcohols, and then modified and reacted to prepare 2-%E7%A2%98%E5%90%A1. After a multi-step carefully designed reaction, the molecular structure is modulated to achieve the expected 2-%E7%A2%98%E5%90%A1 structure.
can also be started from the cyclization reaction. Some chain compounds with suitable functional groups can also be prepared 2-%E7%A2%98%E5%90%A1 by cyclization reaction to build a cyclic structure, and then modifying the groups on the ring. This method has its own advantages and disadvantages. It needs to be carefully selected according to the availability of raw materials, the difficulty of reaction, the high cost, etc., in order to achieve the purpose of efficient and economical preparation 2-%E7%A2%98%E5%90%A1.

In organic synthesis, 2-hydroxybenzoic acid, also known as salicylic acid, has many common applications.
In the field of medicine, its role is significant. In the words of "Tiangong Kaiwu", "Doctors treat diseases and use various medicinal stones, and this acid is also one of the essential medicines". Salicylic acid is a key raw material for the preparation of aspirin. Aspirin has antipyretic, analgesic and anti-inflammatory effects, and can treat colds and fever, headaches and toothaches, rheumatism and arthritis. "Tiangong Kaiwu" says: "The use of medicinal stones is about healing diseases and relieving diseases. The power of these two will benefit everyone." It is chemically converted into aspirin by reacting with acetic anhydride. This process is exquisite, as the book says, "turning complexity into simplicity and turning waste into treasure".
In the field of fragrances, "fragrance, pleasant breath, pleasant mind". Salicylic acid can be used to prepare fragrances, such as wintergreen oil, whose aroma is fresh and pleasant, and is often used to prepare daily chemical flavors. It is used in many perfumes and air fresheners, which can increase fragrance and rhyme and create a pleasant atmosphere.
In the dye industry, "The method of dyeing is related to the brilliant color and will not fade for a long time". Salicylic acid can be used as a dye intermediate to help synthesize a variety of dyes, make fabrics colorful, and meet the world's needs for the beauty of clothing and fabrics. Just like the fine dyeing process recorded in "Tiangong Kaiwu", salicylic acid also plays an important role here, contributing to the synthesis of dyes.
In the rubber industry, "rubber is tough and wear-resistant, and has a wide range of uses". Salicylic acid can be used as an anti-coking agent to delay the scorch phenomenon during the vulcanization process of rubber, improve the quality and performance of rubber products, and ensure its stability and durability in various environments. This is also one of the great contributions of salicylic acid to industrial applications. Just like many industrial techniques recorded in "Tiangong Kaiwu", salicylic acid is also indispensable in this field.

Today, there are two cannons, and their market size is mostly determined by the land, so they can be used uniformly. However, it may be possible to find their clues based on the situation of ancient needs and transactions.
In the past, things were still not done, and the need for fire was urgent, and its price was often affected by factors such as supply and demand, materials, and engineering. Two cannons, if the materials are excellent, the workmanship is exquisite, and when things are urgent, those who need it will be high.
If the world is peaceful, the military cannot be used, but the demand is not as strong as it is, and it may be slightly flat. And if the land is close to the place where it is used, it may also be difficult to save.
Generally speaking, if it is an ordinary second-order gun made with precision and workmanship, in peacetime, it may take ten to one hundred years. In case of a sudden increase in demand, it may be doubled, or even doubled, or even doubled, one to two or three hundred. However, this is a rough estimate, and the market size still needs to be determined.

It is the most important thing for the storage and use of utensils when they are hidden. It should be avoided as if they were clearly hidden, so that they can be properly preserved.
The place where they are hidden is the first place of importance. In a dry place, do not leave utensils in the place where they are hidden, so as not to rot. Such as golden utensils, they are easy to be damaged in contact with water, and they can be damaged after a long time. And it is advisable to clear the vase, which is tired of Egypt, or stain the surface of the utensils. Moreover, the harm of the rat-proof, and the rat-eaten, can be destroyed.
The utensils of the hidden utensils should not be ignored. The solidification of the vase and the box can make the utensils comprehensive. And according to the shape and size of the utensils, and the appropriate accommodations, do not make the utensils suffer, causing their shape to be damaged.
When it comes to this, you must first reduce the weight and brittleness of the utensils. It is easy to lose, but you should not lose your heart, lest it slip. Heavy people need to work together to move the utensils and seek skills to prevent people from being damaged. If the utensils are brittle and fragile, such as ceramics, you should be extra careful.

On the way to send, it is important to keep the utensils safe. If the road is bumpy, the utensils are easy to lose. And it is appropriate to walk, do not be impatient, so as to ensure the safe arrival of the utensils.
On the way to the delivery, it is necessary to pay careful attention to the hidden utensils. Only with care can the utensils be in good condition and their functions be improved.