2-(trimethylsilyl)-1,3-thiazole

Triethylboron is an organic boron compound with the following physical properties:
Triethylboron is a colorless liquid at room temperature and pressure, with an unpleasant odor. Its boiling point is relatively low, about 95 ° C, which allows it to transform into a gaseous state at a relatively low temperature. Its density is less than that of water, about 0.714 g/cm ³, so it can float above the water surface. The melting point of triethylboron is about -93 ° C, which indicates that it can still maintain a liquid state at low temperatures and has good low-temperature fluidity.
Triethylboron has a high degree of chemical activity. It can spontaneously ignite when exposed to air. When exposed to air, it will quickly react violently with oxygen and burn, producing a bright flame, and at the same time produce boron oxide and other products. It is also extremely sensitive to moisture. When exposed to water, it will react violently to produce boric acid and ethane and other substances. Due to its characteristics of spontaneous combustion in air, when storing and using triethylboron, it must be carried out in a strictly oxygen-free and water-free environment. Generally, it will be stored in an inert gas (such as nitrogen) atmosphere to ensure safety. Due to its lively chemical properties, in the field of organic synthesis, triethylboron is often used as a reducing agent or participates in some special organic reactions, providing an important tool for the development of organic synthesis chemistry.

Trimethylsilylacetylene (2- (trimethylsilyl) acetylene-1) and 3-iodopyridine are both important reagents in organic synthesis. Their chemical properties are unique and they are widely used in the field of organic chemistry.
Trimethylsilylacetylene has an active alkynyl group, which exhibits unique reactivity due to the influence of trimethylsilyl group. The silicon group has a certain steric resistance and electronic effect, which can enhance the stability of the alkynyl group, and at the same time change the electron cloud density of the alkynyl carbon atom. It can participate in many reactions, such as Sonogashira coupling reaction. In this reaction, under the catalysis of palladium and the action of base, trimethylsilylacetynyl groups are coupled with the carbon-halogen bonds of halogenated aromatics or halogenated olefins to form alkynyl-containing conjugated system compounds. It is a key method for constructing carbon-carbon bonds, and is of great significance in the synthesis of organic materials with special structures and functions, pharmaceutical intermediates, etc. And trimethylsilyl groups can be selectively removed under specific conditions, which provides convenience for subsequent functional group conversion and increases the flexibility of synthesis.
In 3-iodopyridine, the iodine atom acts as a good leaving group, endowing the pyridine ring with active reactivity. The nitrogen atom of the pyridine ring has a solitary pair of electrons, which has certain alkalinity and coordination ability. 3-Iodine pyridine can undergo nucleophilic substitution reaction. The nucleophilic reagent attacks the carbon atom connected to the iodine, and the iodine ion leaves to realize the functionalization of the pyridine ring. At the same time, due to the uneven distribution of the electron cloud of the pyridine ring, the electrophilic substitution reaction mainly occurs at a specific location. In addition, it can participate in the coupling reaction catalyzed by transition metals, such as coupling with borate esters, organozinc reagents, etc., to construct pyridine-containing compounds with diverse structures, which are used in the fields of medicinal chemistry and materials science to synthesize biologically active molecules and functional materials.

The main uses of di (trimethylphenylmethanone) -1,3-anthraquinone are in the fields of dyes, pigments and medicine.
In the field of dyes, it is often the key intermediate for the synthesis of anthraquinone dyes. Anthraquinone dyes are famous for their bright color and excellent fastness. They are widely used in the textile printing and dyeing industry to make fabrics show rich colors and are not easy to fade after washing and sun exposure.
In terms of pigments, the pigments derived from them have high hiding power, good light resistance and weather resistance. They are often used in the preparation of inks and coatings. In the ink, it can ensure that the printing pattern is clear and the color lasts for a long time; on the paint, it can maintain the color and performance of the coating in different environments.
In the field of medicine, some of its derivatives have certain biological activities and have attracted much attention in drug research and development. Although it is not a direct drug, it provides an important starting material for the synthesis of compounds with specific pharmacological effects, or plays a key role in the modification of drug molecular structure, helping to improve the efficacy of drugs and reduce side effects.
"Tiangong Kaiwu" says: "Everything in the world is useful, and the best is to make the best use of its materials." The use of two (trimethylbenzophenone) -1,3-anthraquinone in various industries is just an example of making the best use of things. Its contributions in the fields of dyes, pigments, medicine, etc., demonstrate human's in-depth understanding and ingenious use of material characteristics, and use its characteristics to create colorful fabrics, durable paint inks, and potential pharmaceutical products, which add color and quality to many aspects of life.

The synthesis method of di- (trimethoxybenzyl) -1,3-butadiene, although the classic "Tiangong Kaiwu" does not directly describe the synthesis of this specific compound, it contains many chemical process ideas for reference.
In the ancient chemical industry, the selection of raw materials is the key. To synthesize this substance, you can find raw materials that naturally contain benzyl and butadiene structures. Such as certain plants or minerals, after fine screening and purification, or related basic ingredients can be obtained.
Separation and purification methods also have techniques in ancient times. Or the method of distillation is used to separate the mixed substances according to the difference in boiling points of different substances. When synthesizing di- (trimethoxybenzyl) -1,3-butadiene, the reaction product may contain impurities, which can be separated from the impurities by distillation.
Chemical reaction conditions also need to be studied. Ancient chemical industry often uses temperature and catalyst to regulate the reaction. To promote this synthesis reaction, or find a suitable temperature. Or in the stove, the temperature is delicately controlled by heat to make the reaction proceed in the direction of generating the target product. As for catalysts, natural materials such as certain metal ores, plant ash, etc., may speed up the reaction rate and improve the efficiency of product formation.
Although the synthesis of this compound is not detailed in "Tiangong Kaiwu", the concept of chemical raw materials, purification, and reaction conditions can be used to explore the synthesis of di- (trimethoxybenzyl) -1,3-butadiene today, and many ideas can be inspired.

In the process of storing and transporting triaminobenzyl and benzoin, there are many points to be paid attention to.
Triaminobenzyl has active properties and strict requirements on the storage environment. It should be placed in a cool, dry and well-ventilated place, away from fire and heat sources. Because of its flammability, it is very easy to burn in case of open flame and hot topic, so it should be stored separately from oxidants and acids, and must not be mixed in storage to prevent severe reactions. When transporting, be sure to ensure that the packaging is complete and the loading is safe. During transportation, it should be protected from exposure to sunlight, rain and high temperature. When handling, it should be handled lightly to avoid damage to packaging and containers.
Benzoin should also be stored in a cool and ventilated place. It should be stored separately from oxidants, acids, and edible chemicals, and should not be mixed. Because it may decompose and produce harmful gases when heated, the storage temperature should not be too high. During transportation, it is also necessary to ensure that the container does not leak, collapse, fall, or damage. During transportation, it should be protected from exposure to the sun, rain, and high temperature. Be careful when loading and unloading to prevent benzoin from spilling.
In short, both storage and transportation need to be operated in strict accordance with regulations, paying attention to the control of environmental conditions, avoiding mixed transportation, and handling and unloading specifications to ensure the safety of personnel and the environment and prevent accidents.