5-BROMO-2-PHENYLTHIAZOLE-4-CARBOXYLIC ACID ETHYL ESTER

"Tiangong Kaiwu" is a scientific and technological masterpiece written by Song Yingxing in the Ming Dynasty, in which there are many detailed descriptions of the uses of various substances. Today, the ancient Chinese answer to the question "What is the use of 5-mercury-2-tin-based bearing alloy-4-ethyl acetate".
Mercury, commonly known as mercury, is a liquid metal at room temperature. Its uses are quite extensive. In ancient alchemy, mercury was often an important thing. The alchemists wanted to use it to refine the elixir of immortality. Although they did not get what they wanted, they also promoted the chemical exploration at that time. In the field of medicine, mercury and its compounds have been used to make some medicinal pills to treat skin diseases such as scabies, but they are rarely used today because of their toxicity. In addition, mercury is also used in pressure measuring instruments, such as common mercury barometers, which use the characteristics of mercury to measure atmospheric pressure.
Tin-based bearing alloy is an alloy made of tin as the matrix and adding antimony, copper and other elements. Its texture is soft and wear-resistant, and it is mostly used in the manufacture of bearings for various types of machinery. In ancient vehicles, ships, textile equipment and other machinery, this alloy bearing can reduce the friction between parts, make the machine run more smoothly, prolong the service life of the equipment, and ensure the convenience of production and travel.
Ethyl acetate, an organic compound with a fragrant smell. Although there was no such fine synthesis technology as modern in ancient times, there may be similar products in the brewing process. It can be used as a fragrance to add a unique aroma to the preparation of perfumes. In the printing and dyeing industry, ethyl acetate can be used as a solvent to help the dye disperse evenly, making the fabric dye more uniform and bright in color. And because of its good volatility, it can be used in some special processes, such as the production of fine lacquer, to prepare paint, so that the drying speed of the paint layer is suitable, and the surface is smoother.

To prepare 5-hydroxy- 2-furanaldehyde and ethyl 4-chloroacetate, the method is as follows:
to prepare 5-hydroxy- 2-furanaldehyde, which can be obtained from furfural through a series of reactions. First, furfural is reacted with a certain reagent under specific conditions. This reagent may be [specific reagent 1]. When the temperature is [X] ℃ and the pressure is [Y] kPa, the two interact. After [specific reaction process 1], an intermediate product can be obtained. Then the intermediate product is treated with [specific reagent 2], and the pH of the reaction system is adjusted to [specific pH value]. After [specific reaction process 2], 5-hydroxyl-2-furanaldehyde can be obtained. In this process, the control of the reaction conditions is extremely critical. If the temperature is too high or too low, and the amount of reagent used will affect the purity and yield of the product.
As for the synthesis of ethyl 4-chloroacetate, chloroacetic acid and ethanol can be used as raw materials, catalyzed by [specific catalyst], and reacted under the state of heating and reflux. Mix chloroacetic acid and ethanol in [specific ratio], add an appropriate amount of catalyst, heat up to [specific temperature] ° C, and maintain reflux for [specific time]. During the reaction, pay close attention to the reaction process, which can be monitored by thin-layer chromatography and other means. After the reaction is completed, the unreacted raw materials and by-products can be removed through post-processing steps such as distillation and extraction, and pure ethyl 4-chloroacetate can be obtained. During operation, the purity of ethanol, the activity of the catalyst, and the length of the reaction time all have a significant impact on the synthesis effect, so caution must be taken.

5-Mercury-2-ethanol-4-ethyl acetate has good physical properties. Mercury, at room temperature and at normal temperature, the liquid is golden, the color is white, there is gold light, the density is high, and it is 13.59g/cm ³. It is easy to flow, and the steaming is toxic. Its melting temperature is -38.87 ° C, boiling temperature is 356.6 ° C, and it has good performance and constant swelling, so it is often used in water, blood, and other devices.
Ethanol is a transparent liquid with high color, with a special fragrance and easy to burn. The density of water is small, 0.789g/cm ³, melting temperature is -114.1 ° C, boiling temperature is 78.3 ° C. It can be mutually soluble in water in any ratio, and it can also dissolve many substances. It is commonly used in water. Its high density makes it easy to dissipate in the air under normal conditions, and it is flammable. It is flammable and has a light color flame.
Ethyl acetate is also a transparent liquid with high color. It has a fruity aroma and low resistance. Density 0.902g/cm ³, melting temperature -83.6 ℃, boiling temperature 77.1 ℃, slightly soluble in water, miscible in alcohols, ketones, ethers, etc. Due to its special fragrance, it is often used in the fields of fragrances, solvents, etc.
The physical properties of the three are different, mercury has a special class due to its special liquid properties such as gold resistance and high toxicity density; ethanol has a special class due to its water miscibility and flammability; ethyl acetate has a special class due to its fragrance and solubility in the solution. Due to its physical properties, it has different uses in various aspects such as work, work, and daily life.

The author of "Tiangong Kaiwu" is a great achievement of ancient technology. Today, there are questions about the chemical properties of mercury, beryllium, bismuth, and gallium, and they are explained in ancient texts.
Mercury is a liquid metal at room temperature, with silver light flickering and lively. Its density is quite large, especially in many metals. Mercury is volatile, and it can form mercury vapor when dispersed in the air. This gas is highly toxic and can hurt people's organs and mind. Mercury can combine with a variety of metals to form amalgam, such as gold and silver. When it encounters mercury, it can be mixed with it.
Beryllium has a hard texture, but its specific gravity is relatively light. Chemical properties are active, easily oxidized in air to form a dense oxide film, which can prevent further oxidation. Beryllium can react with acids and bases to release hydrogen, and the intensity of the reaction varies depending on the environment.
Bismuth is brittle and soft, with a reddish color. Chemical properties are relatively stable, and it is not easy to oxidize in room temperature air. It can also react chemically when it encounters strong oxidizing agents. Bismuth compounds have a wide range of uses and are used in medicine, chemical industry and other fields.
Gallium has a very low melting point, slightly higher than room temperature. It can be melted into a liquid state when placed in the palm of your hand. Its chemical properties are active and can combine with halogens, oxygen and other elements. Gallium can also react with acids and bases, exhibiting the typical characteristics of metals.
Although these numbers are all metals, their chemical properties are different, either active or stable, and they have their own uses in heaven and earth. They are used by our generation to promote technology and benefit the world.

In today's market, the prices of mercury, bismuth, and isopropyl ruthenate are related to people's livelihood, and everyone thinks about it.
Mercury is active and has a wide range of uses. It is common in the pharmaceutical and chemical industries. In the past, the price of mercury often fluctuated due to changes in supply and demand and difficulties in extraction and refining. If the mineral source is abundant and the extraction and refining are smooth, the price may decrease steadily; if the mineral source is scarce, and the mining is difficult, and the demand has not decreased, the price is easy to rise. Looking at the market in recent years, the price of mercury is often affected by environmental regulations. Due to the pollution of refining, the control has become stricter, the cost has increased, and the price may rise. < Br >
Bismuth has special properties and is also important in electronics, medicine, and chemical industry. The amount of its production and the degree of its use determine its price. If it is produced and used less, the price may fall; if it is produced less and used more, the price will rise. And the mining and refining of bismuth is not easy, and exquisite techniques are required. If the technique is refined, the cost may fall, and the price is also guided by it. Nowadays, with the advance of technology, new uses are emerging, which increases the demand and the price is also stimulated by it.
Isopropyl ruthenate is a chemical agent and is crucial in the field of catalysis. The change of its price is related to the supply of raw materials, the simplicity of the process, and the demand of the market. If the raw materials are abundant, the process is simplified, and the price may be stable; on the contrary, if the raw materials are scarce and the process is complicated, the price will be high. Furthermore, industry competition and policy orientation are also variables in price. Competition in the same industry, or there are concessions; policy encouragement or restrictions, can make the price fluctuate.
The market is impermanent, and the price is indeterminate. The market prices of mercury, bismuth, and isopropyl ruthenate often change with time. Both the industry and the user should observe the changes in the market to cope with the ever-changing state.