1-tritylimidazole-4-carboxaldehude

Trimethoxyborane is a chemical substance. It is active and plays an important role in many reactions. Methyl ether also has unique chemical properties.
Methyl ether is a colorless gas at room temperature and pressure, with a slight ether odor. Its boiling point is quite low, about -24.9 ° C, which makes it easy to volatilize. Methyl ether is soluble in water, but its solubility is limited, and it has better solubility in organic solvents. The chemical activity of methyl ether is relatively stable compared with some common organic compounds. However, under certain conditions, it can also show its active side. For example, in the presence of a suitable catalyst, methyl ether can react with oxygen. This reaction may be combustion, releasing a large amount of heat, which can be used as fuel. Partial oxidation reactions may also occur to form other oxygenated compounds.
In addition, methyl ether can participate in some substitution reactions. When in a suitable reaction environment, the methyl group in its molecule can be replaced by other functional groups, resulting in the derivation of a wide variety of organic compounds, which is of great significance in the field of organic synthesis.
Because the molecular structure of methyl ether contains oxygen atoms, it can interact with some reagents with oxygenicity, triggering unique chemical reactions. This provides the possibility to explore new chemical reaction pathways and synthesize new substances. The diversity of its chemical properties has opened up a vast field for chemical research and industrial applications.

There are many ways to make triterpenoid methoxy ethers and 4-methyl ethers. There are many methods. According to the principles of "Tiangong Kaiwu", they can be described as follows.
To make triterpenoid methoxy ethers, triterpenoids are often used as the base, accompanied by methanol and a catalyst. First, the triterpenoids are placed in a clean vessel, and methanol is slowly injected into it to make the two blend. Add an appropriate amount of catalyst. This agent can promote the speed of the reaction. Commonly used are sulfuric acid and the like. Warm with low heat, control the heat, and make it slowly boil. During this period, frequent stirring is required to ensure a uniform reaction. Time-lapse, the reaction gradually forms, and triterpenoids and methanol synthesize triterpenoid methoxy ethers. After that, the impurities are removed by distillation to obtain a pure product.
As for the synthesis of 4-methyl ether, there are also various wonderful methods. Usually the corresponding raw materials, or compounds containing hydroxyl groups, are used to make them meet with methylating reagents. For methylating reagents, iodomethane, dimethyl sulfate and the like are also used. First dissolve the raw materials in suitable solvents, such as dichloromethane, acetone, etc., to facilitate the smooth reaction. The second addition of methylating reagents can also be assisted by adding bases as appropriate. The bases can take the hydrogen of the raw hydroxyl groups and promote the methylation reaction. At the time of the reaction, check the temperature and time. After the reaction is completed, 4-methyl ether can be obtained after extraction, washing, drying and other steps, except for its by-products and impurities.
The synthesis of these two requires fine operation, and the temperature, dosage, and time must be precisely controlled to obtain a good product. Although "Tiangong Kaiwu" does not elaborate on these two, the principles of chemical industry are similar in ancient and modern times. According to the thinking of its creation, finding this synthesis method can also obtain its delicacy.

"Tiangong Kaiwu" has a saying: "All three branches of bitter saponins are widely used. As for the four-armor gadfly, it is also used in many places."
The four-armor gadfly, in the field of medical Tao, has a great effect. Ancient physicians often used the four-armor gadfly as medicine. It is dry in nature and has a salty taste. It can break blood and remove blood stasis, and clear the meridians and activate collaterals. In the case of a woman's blood stasis and menstruation, if used properly, the meridians and water can be connected, and the qi and blood can be adjusted. And if you are injured by bruises, blood stasis is swollen and painful, and the four-armor gadfly can dissipate blood stasis and reduce swelling, so that the pain of the injured will be slightly reduced.
< b If livestock are invaded by insect poison, or the bloodline is not smooth, the four-armor gadfly is supplemented with other medicines, which can cure the disease of livestock, ensure their health, and promote their reproduction.
In the agricultural land, although its body is small, it is also related. The four-armor gadfly has the ability to restrain some pests, which can protect crops from pests and ensure the harvest of crops. And where it moves, it may loosen the soil, which is conducive to the growth of crops.
Furthermore, in the tanning industry, some characteristics of the four-armor gadfly may help the tanning of leather. It can make leather more tough, better color, extend its use and increase its value.
Although the four armored flies are tiny objects, they have their non-negligible effects in the fields of medicine, animal husbandry, agriculture, and tanning, and are truly treasures bestowed by nature.

It is common sense that among the shops in Guanfu City, there is a price for rice, corn, cloth and silk. As for the market price of A
, it is not determined for no reason, and it is subject to various factors.
One of them is related to the change of seasons. There are abundant apologies in the year, and there are cold and summer in the season. This has a huge impact on the production of A
. If it is a good year, the product is abundant, the quantity of A
is also abundant, and the supply in the city is sufficient, its price is flat, or has dropped; if it is a bad year, all kinds of things are scarce, and A
is also rare, and the price will rise. And in spring, summer, autumn and winter, there are things that are suitable for each. If A
is listed in time, the quantity is large and the price is
Second, it depends on the place of origin. Different places have different water and soil, and the quality of the armor produced is also different. If it comes from fertile ointment soil and is properly irrigated, the armor produced is fat and tender, and its reputation is far-reaching, its price should be higher than elsewhere; and if it is produced in a barren place, the product is inferior, and the price must be lower. And the distance between the place of origin and the city also involves the amount of freight. If it is close to the city, it will cost less, and the price will be close to the people; if it is far away, it will cost more and more, and the price will also increase accordingly.
Third, it is related to labor costs. From the seed of armor, the maintenance, the harvest, and even the sale of armor in the market, all require manpower. When sowing, it takes effort to choose seeds and fertilize; when growing, weeding and worming should not be slack; after harvesting, packing should also be done manually. If the cost of manpower is high, the price of armor should not be low. In addition, the purchase of equipment and the rental of premises are all costs. If the cost is high, how can the price not rise?
Fourth, the supply and demand of the market is also the main reason. If there are many diners and they like to eat armor, the demand is strong, but the supply is limited, and the price will rise; on the contrary, if the demand is scarce and the demand is weak, even if the products are abundant, the price will be difficult to afford, or there will be price reductions to sell.
To sum up, the market price of A is determined by the intertwining of various factors such as season, origin, cost of labor, supply and demand, etc., and cannot be caused by a single reason. Between traders, they can know the price by observing these ends, and between transactions, they can also be fair.

"Tiangong Kaiwu" has a saying: "Where sulfur is, the stone pavilion fat is the sulfur root, and its essence forms sulfur." Sulfur is warm in nature, and it is widely used. Now on the storage conditions of sulfur, it is quite important.
Sulfur is flammable, and it is very easy to burn in case of open flames and hot topics. Therefore, the storage place should be kept away from fire and heat sources. The warehouse should be selected in a cool and ventilated place to prevent danger caused by excessive temperature. And the temperature of the warehouse should be controlled within a suitable range, and it should not be overheated, causing its properties to change.
Furthermore, sulfur is prone to violent reactions with oxidants, etc. Therefore, it needs to be stored separately from oxidants, reducing agents, acids, etc. during storage. It must not be mixed and transported to avoid chemical reactions and disasters. Warehouse managers should also be familiar with the characteristics of sulfur and operate strictly to prevent friction and impact. It may also cause it to burn due to small sparks.
The place of the warehouse should be kept dry and avoid moisture. Due to the moisture of sulfur, although it does not decay quickly like other things, it may affect its quality, and it is difficult to achieve the expected effect when used later. And the electrical equipment of the warehouse must meet the requirements of fire prevention and explosion prevention to avoid electrical failure to generate sparks and ignite sulfur.
In addition, obvious warning signs should be set up around the warehouse to remind everyone that flammable materials are stored here and need to be treated with caution. Daily inspections should also be strengthened to detect and deal with possible safety hazards in a timely manner, so as to ensure the safety of sulfur storage.