Disodium-9-ethyl-6,9-dihydro-4,6-dioxo-10-propyl-4H-pyrano(3,2-g)quinoline-2,8-dicarboxylate

This is a compound of disodium-9-ethyl-6,9-dihydro-4,6-dioxo-10-propyl-4H-pyrano (3,2-g) quinoline-2,8-dicarboxylate. Looking at its name, in order to understand its chemical structure, it is necessary to analyze the meaning of its parts.
"Disodium", it is said that its compound contains disodium atoms and is a cationic part. "9-ethyl" refers to the specific position of the compound, that is, the 9th position, which is connected with an ethyl group. " 6,9-Dihydro ", indicating the state of hydrogen atoms at positions 6 and 9, which is not a fully saturated structure." 4,6-dioxo ", which means that positions 4 and 6 are in the form of oxygen, that is, carbonyl-containing structure." 10-propyl ", is connected to propyl at position 10." 4H-pyrano (3,2-g) quinoline ", this is the fused ring structure of the compound core, which is formed by the combination of pyrano and quinoline rings in a specific way." 2,8-dicarboxylate ", indicating that positions 2 and 8 are carboxylate structures, which combine with the aforementioned sodium atoms to form salts.
In summary, the chemical structure of this compound consists of alkyl groups, oxo groups, fused ring structures and carboxylic salts connected at specific positions, and each part is connected to each other to form a unique chemical entity.

In the book "Heavenly Works", each of the world's products has its own use. Today, this product is named dioxo-9-ethyl-6,9-dioxo-4,6-dioxo-10-propyl-4H-pyrano (3,2-g) quinoline-2,8-dicarboxylic acid, and also has its own special use.
First, in the way of medicine, this product may have function. Or it can be made to help people, to deal with people's diseases. Because of its special manufacture, or the synthesis of the product, to increase the effect, to cure the pain of the world.
Second, in the chemical industry, it can also be used. Its properties or can determine the composition of the chemical product, so that it has better performance and better shelf life. And it may be able to give some special effects to the chemical product, such as improving color, nourishing muscles, etc., in order to achieve the pursuit of beauty in the world.
Third, in the field of work, this product may be used as a catalyst. In some chemical reactions, it can speed up the reaction rate, improve production efficiency, and reduce costs. Or it can be used to synthesize special materials to make the material have better properties, such as durability, corrosion resistance, etc., and promote the development of the work.
In addition, dioxo-9-ethyl-6,9-dioxo-4,6-dioxo-10-propyl-4H-pyrano (3,2-g) quinoline-2,8-dicarboxylic acid, in many aspects, such as chemical products, work, etc., have their important uses, can be used widely, and are indispensable to the world.

The text of "Tiangong Kaiwu" is simple and plain, and the nature of the object is the main thing. In today's words, "Disodium - 9 - ethyl - 6,9 - dihydro - 4,6 - dioxo - 10 - propyl - 4H - pyrano (3,2 - g) quinoline - 2,8 - dicarboxylate" is an organic compound. Its physical properties, first of all appearance, under room temperature, or in the shape of powder, white as snow, delicate as frost, placed in the palm of the hand, seems to have a smooth feeling, without rough thorns to touch.
Regarding solubility, this compound is slightly soluble in water. In hot water, its solubility is slightly increased, but it is not completely soluble. It is like a cloud in water. Although it can be dispersed, it is difficult to blend seamlessly. In organic solvents, such as ethanol, acetone, etc., its solubility is better, and it can be quickly dispersed. It is like a fish entering a river, free and integrated with it.
Looking at its melting point, it can be seen through trial that it needs to reach a specific high temperature before it can be turned from solid to liquid. This temperature is quite high, just like iron through a fire, it needs a thousand degrees of high temperature before it can melt. As for the boiling point, it is even higher. In ordinary environments, it is difficult to see its boiling state, just like the stars in the sky, which is out of reach.
Its density is also fixed, compared with water, or slightly heavier. If it is placed in water, such as a stone sinking abyss, it slowly descends to the bottom. The physical properties of this compound are all inherent in it, and it is very useful in scientific research and industry. It needs to be explored in detail before it can do its best.

To prepare disodium-9-ethyl-6,9-dihydro-4,6-dioxo-10-propyl-4H-pyrano (3,2-g) quinoline-2,8-dicarboxylate, the method is as follows:
First, prepare the corresponding starting materials, such as quinoline derivatives containing specific substituents and pyran precursors with appropriate functional groups. In a clean and dry reactor, dissolve the above raw materials in a suitable organic solvent, such as dichloromethane or N, N-dimethylformamide, to ensure that they are fully mixed.
Then, an appropriate amount of alkali, such as potassium carbonate or potassium tert-butanol, is added to catalyze the reaction. The function of the base is to promote the reaction of the relevant functional groups in the raw material molecules to form the desired pyranoquinoline structure. During the reaction process, close attention should be paid to the change of temperature to maintain the reaction temperature within a specific range, generally speaking, or between room temperature and 60 degrees Celsius, depending on the raw material and reactivity.
When the reaction reaches the desired level, it can be monitored by thin-layer chromatography. If the reaction is completed, pour the reaction mixture into an appropriate amount of ice water to stop the reaction. Then, extract the product with a suitable organic solvent, such as ethyl acetate. After the extract is dried with anhydrous sodium sulfate, remove the desiccant, and concentrate the solution by vacuum distillation to obtain a crude product.
The crude product still needs to be further purified. Column chromatography can be used, silica gel is used as the stationary phase, and suitable eluents are selected, such as the mixed solvent of petroleum ether and ethyl acetate. The proportion is adjusted according to the polarity of the product. After elution, collection and concentration, the final product is pure disodium-9-ethyl-6,9-dihydro-4,6-dioxo-10-propyl-4H-pyrano (3,2-g) quinoline-2,8-dicarboxylate. The whole preparation process needs to be carefully operated, and attention should be paid to the condition control of each step to ensure the purity and yield of the product.

This is disodium-9-ethyl-6,9-dihydro-4,6-dioxo-10-propyl-4H-pyrano (3,2-g) quinoline-2,8-dicarboxylate. During the use of this substance, many matters need to be paid attention to.
First of all, because of its complex chemical structure and unique characteristics, it is necessary to strictly follow the established procedures when accessing and operating. Do not change the operation steps at will to prevent accidents. This substance may affect the human body, so the operator must take protective measures. For example, wear suitable protective gloves to avoid contact with the skin, because some chemicals can penetrate into the body through the skin, causing adverse consequences. At the same time, wear protective glasses to prevent the substance from splashing into the eyes and causing damage to the eyes. If accidentally splashed, you should immediately rinse with a lot of water and seek medical attention as soon as possible.
In addition, storage is also extremely critical. It needs to be stored in a dry, cool and well-ventilated place. Because it may be sensitive to humidity and temperature, if the storage environment is poor, or its properties change, it will affect the use effect. And it should be stored separately from other chemicals to avoid mutual reaction and cause danger.
During use, the dosage needs to be precisely controlled. Excessive use or waste of resources may also cause other unnecessary reactions. If the dosage is too small, it is difficult to achieve the desired effect. Therefore, before use, the dosage should be determined by accurate calculation according to actual needs.
In addition, the use field needs to be well ventilated. Due to the chemical reaction process, harmful gases may be generated, and good ventilation can discharge harmful gases in time to ensure the health and safety of operators.
After the operation, do not take the remaining substances and equipment lightly. The remaining substances need to be properly disposed of and should not be discarded at will to avoid pollution to the environment. The equipment used should be thoroughly cleaned to ensure that there is no residue for next use.