What are the main uses of 5-3-1,2-diterpenes? This is a question about the use of the ingredients in the Chinese herb. "Tiangong Wuwu" is not an ancient book of ancient things, but it can also be known that the ancients knew and used it for general things, or it can be shown that it was used in the Chinese herb.
The herb has been used by the family since ancient times to cure diseases. 5-The herb, its nature may have a general effect. In the ancient books, the use of the herb is often used for washing, burning fire, chasing water, etc. If the herb does not melt, the abdomen is comfortable, and the use of the herb can make the herb drain and pass through the six internal organs.
3 - It is a common method for the treatment of diseases in herbs. The compatibility of herbs like herbs is boiled in water, and the juice is taken. The beauty of the herb is that it can be combined according to the disease and the essence. For example, to treat cold and cold, hemp and cinnamon branches are often used to disperse the cold; to treat diseases, plaster and anemarrhena are used to clear away evil.
1,2 - Diterpenes, one of the many components of herbs. Diterpene compounds, or have anti-inflammatory and antibacterial properties. In ancient times, it was not clear how it could be transformed today, but it was not used, or it has been found that herbs containing diterpenes can be effective in treating diseases such as herbs. Due to the anti-inflammatory properties of diterpenes, it can eliminate the pain in the local area.
There are also people who suffer from pain due to their pain.
The diterpene component may be able to reduce the blood and relieve pain. The ancients used it, and it was more effective and tiring, so they knew what grass could cure what disease, but it was not necessarily clear. However, it was left to study the use of grass in the world, especially the role of diterpenes and other components, laying the foundation, so that I can explore along this, and understand the wonders of grass in treating diseases.

5-Bromo-3-pentene-1,2-diol is an organic compound with the following physical properties:
- ** Properties **: Usually colorless to light yellow liquid, stable at room temperature and pressure. This appearance characteristic is convenient for identification and observation of its state changes in various reactions and application scenarios.
- ** Solubility **: Soluble in common polar organic solvents such as water, ethanol, and ether. This characteristic is attributed to the hydroxyl group (-OH) contained in its molecular structure, which can form hydrogen bonds with water molecules and other polar solvent molecules, thereby improving the solubility. Good solubility makes it easy to participate in various reactions in organic synthesis, drug development, and other fields. Because it can be evenly dispersed in different solvent systems, it is conducive to the full progress of the reaction.
- ** Boiling point **: The boiling point is in a specific temperature range, about [X] ° C (the specific value varies depending on the experimental conditions). The boiling point is affected by intermolecular forces. There are hydrogen bonds and van der Waals forces between the molecules of 5-bromo-3-pentene-1,2-diol. These forces determine the energy required for the conversion of its liquid state to a gas state, which in turn determines the boiling point. It is crucial to determine the boiling point for the separation and purification of this compound. In operations such as distillation, it can be separated from other substances according to the difference in boiling point.
- ** Melting point **: The melting point is also a specific temperature, about [X] ° C. The melting point is also restricted by the intermolecular forces. When the temperature reaches the melting point, the thermal motion of the molecules is sufficient to overcome some of the intermolecular forces and promote the transformation of the solid into a liquid. Knowing the melting point helps to judge the purity of the compound. The melting point of a pure substance is fixed. If it contains impurities, the melting point will decrease and the melting range will become wider.
- ** Density **: The density is about [X] g/cm ³. Density, as a basic physical property of a substance, is related to the molecular mass and the degree of compaction between molecules. The density of this compound is of great significance in chemical production, storage and transportation. It can be used to determine its settlement and floating in different media and its distribution in mixed systems.

The chemical properties of 5-% hydroxyl-3-enheptyl-1,2-diol are quite stable. The structure of this compound, hydroxyl, is hydrophilic and can form hydrogen bonds with water, so that the compound has a certain solubility in water. The alkenyl group is an unsaturated bond. Although it has a certain reactivity, its location and the overall structure of the molecule affect each other, which restricts its activity.
Under common chemical reaction conditions, if there is no strong oxidant, strong reducing agent or special catalyst intervention in the environment, the main structure of 5-% hydroxyl-3-enheptyl-1,2-diol can remain relatively stable. For example, at room temperature and pressure, and in neutral or weak acid-base medium, the chemical bonds between the atoms in the molecule are not easy to break and rearrange.
Furthermore, the diol structure also adds a lot to the stability of the substance. The diol bis-hydroxyl group interacts to form an intramolecular hydrogen bond, which strengthens the molecular structure and hinders the attack of external reagents, thereby improving its chemical stability. Even in the case of generally mild chemical reactions, it is not easy to break its original structure, and specific reaction conditions and reagents are often required to promote significant chemical changes.
Therefore, in general, 5-% hydroxyl-3-enheptyl-1,2-diol has relatively stable chemical properties under many common circumstances.

To prepare 5-bromo-3-allyl-1,2-diphenol, the following methods can be followed:
First, phenols are used as the starting point, and bromine atoms are introduced by halogenation reaction. The activity of phenols is high. Under suitable conditions, bromine can be substituted in a selective position to obtain bromophenols. Subsequently, allyl is introduced through allylation reaction. Allylation is often reacted with allyl halide or allyl alcohol as a reagent. Under the action of base or catalyst, the hydroxyl group of phenol reacts with allyl reagent to form a carbon-oxygen bond to obtain 5-bromo-3-allyl-1,2-diphenol. For example, using catechol as a raw material, before low temperature, in a suitable solvent (such as dichloromethane), bromine is added dropwise to control the reaction process, so that bromine is substituted to obtain bromocatechol. Then it is reacted with allyl bromide in a solvent such as acetonitrile in the presence of a base such as potassium carbonate, heated and refluxed to obtain the target product.
Second, allyl phenol is used as the starting material. First, allyl phenol is brominated. Due to the positioning effect of allyl, bromine atoms can be introduced into a specific position to obtain 5-bromo-3-allyl-1,2-diphenol. If 3-allyl-1,2-diphenol is used as a raw material, in the presence of light or initiator, radical substitution reaction occurs with bromine, and the selective introduction of bromine atoms can be realized.
Third, the reaction participated by organometallic reagents. For example, an allyl-containing Grignard reagent or a lithium reagent is prepared first, and a coupling reaction is carried out with a bromophenol-containing derivative. Using 2-bromo-1,3-catechol as a substrate, it is reacted with allyl Grignard reagent in anhydrous ether or tetrahydrofuran at low temperature, and then hydrolyzed to obtain 5-bromo-3-allyl-1,2-diphenol.
Fourth, the protective group strategy is adopted. First protect the phenolic hydroxyl group to avoid its overreaction in the reaction. For example, protect the hydroxy group of catechol with a protective group such as tert-butyl dimethylsilyl, and then carry out bromination and allylation reactions. After the reaction, remove the protective group and obtain the target product. This strategy can effectively control the reaction check point and improve the yield and selectivity.

The price of 5-%-3-saliva-1,2-2 is determined by the price of the market, and the price of the price is determined by the price. The price of the price is often affected by general factors, which cannot be covered in one word.
The first thing to do with it is the difference between the land. In different places, the price of 5-%-3-saliva-1,2-2 is different due to different water, soil and weather conditions. The quality and quantity are also different, which must affect the price. For example, if the water and soil are fertile, the quality of the product is high, and the price is high or high; and if the land is not good, the quality is slightly low, and the price will be reduced.
Secondly, the price is also an important factor. If a large number of 5-% -3-sirloin-1,2-2 is mature and listed on the market, the market supply is sufficient, and the supply is "thin". This supply is greater than the demand, and the price is often flat or reduced. On the contrary, if it is not prosperous, the market supply is scarce, and the demand is not yet available, the price must be increased.
Furthermore, the supply and demand of the market are deep. If the demand for 5-%-3-sirloin-1,2-2 increases sharply in the near world or other industries, and the supply fails to keep up, the price will increase; if the demand is low, even if the quantity is rich, the price will also improve.
In addition, the cost of saving and other costs cannot be ignored. If 5-%-3-Saliva-1,2-2 is required for transportation, storage, etc. on the way, it will be added to the price, resulting in an increase in its price.
In terms of the price, 5-%-3-Saliva-1,2-2 is applied to the market, or due to the above-mentioned factors, a certain price will be determined. The price can only be obtained according to the specific situation, place and city.