2% 2C3-diene-1-alkynyl-4-methoxyphenyl has important uses in many fields.
In the field of medicinal chemistry, it can be used as a key intermediate to help synthesize compounds with specific biological activities. For example, in the development of anti-tumor drugs, with its unique chemical structure, it can construct molecules that precisely bind to tumor cell targets, interfere with the growth and proliferation of tumor cells, and find new ways to overcome cancer problems.
In the field of materials science, it can participate in the creation of polymer materials. Because it contains special functional groups, it can regulate the electrical and optical properties of materials. For example, it can be introduced into polymers, or materials with excellent photoelectric conversion efficiency can be prepared, making a name for themselves in the field of solar cells and promoting the development of renewable energy technologies.
In the field of organic synthetic chemistry, 2% 2C3-diene-1-alkynyl-4-methoxyphenyl is a valuable synthetic building block for the construction of organic molecules. Chemists can use various reactions, such as nucleophilic substitution, cyclization reactions, etc., to build complex organic frameworks, expand the structural diversity of organic compounds, and lay the foundation for the exploration of new organic functional materials and bioactive molecules.
In the total synthesis of natural products, the unique structure of this compound may be consistent with key fragments of some natural products. By incorporating it into the total synthesis route, it can efficiently build the core structure of natural products, facilitate the total synthesis of natural products, and provide the possibility for in-depth exploration of the biological activity and medicinal value of natural products.

2% 2C3-diene-1-methoxy-4-ethoxy-benzene is an organic compound, its physical properties are quite unique, as detailed below:
- ** State and color **: Under normal temperature and pressure, it is usually a colorless to pale yellow liquid, clear and transparent. Under certain light conditions, it may have a faint luster flickering, such as the faint light sprinkling through the branches and leaves in the morning, soft and pure. This compound is like a quiet stream in laboratory glassware, exuding a unique charm.
- ** Smell **: It has a special aromatic smell, like spring flowers and woody notes, fresh but elegant. Although this smell is not tangy and strong, it quietly lingers, giving people a sense of soothing, like walking in a lush forest in spring, and the air is fragrant.
- ** Melting Boiling Point **: The melting point is low, and it condenses into a solid state in a specific low temperature environment, just like lake water in winter, which solidifies when cold. The boiling point is within a certain range. When heated, the molecules become active, break free from the shackles of the liquid phase, and turn into gaseous rising. The specific melting boiling point value is affected by the purity of the compound and external pressure, just like a ship sailing in different waters, affected by the current and wind direction.
- ** Solubility **: It has good solubility in organic solvents such as ethanol and ether, just like salt integrated into water and evenly dispersed. Due to the similarity and compatibility of its molecular structure with organic solvents, the two seem to be close partners and fuse with each other. However, the solubility in water is not good, because the hydrophobic part of the molecule accounts for a large proportion, it is difficult to be compatible with water molecules, just like oil and water, and the boundary is clear.
- ** Density **: The density is slightly higher than that of water, dripping it into the water, such as a stone sinking to the bottom of a lake, slowly settling to the bottom, forming an independent liquid phase under the water layer, and the two layers are clear.

2% 2C3-diethyl-1-naphthyl-4-methoxybenzene, this is an organic compound. Its chemical properties are quite complex, let me explain in detail for you.
As far as its stability is concerned, it is endowed with a certain stability due to the conjugated system of benzene ring and naphthyl group contained in the molecule. The benzene ring and naphthyl group have a tight structure and a uniform electron cloud distribution, which makes the molecular framework relatively stable, and it is not easy to occur ring opening or decomposition reactions under normal conditions.
From the perspective of reactivity, methoxy group as the power supply radical will increase the electron cloud density of the benzene ring, thereby enhancing the electrophilic reactivity of the benzene ring. In the electrophilic substitution reaction, the adjacent and para-sites of the methoxy group are more susceptible to attack by the electrophilic reagents. For example, when it encounters the halogenating agent, the halogen atom is easily replaced by the hydrogen atom of the adjacent and para-sites of the methoxy group, and the halogenation reaction occurs.
Furthermore, the 2,3-diethyl basic body will affect the spatial structure of the molecule. The presence of ethyl groups increases the steric hindrance of the molecule. In some reactions, it will hinder the proximity of the reagent to a specific position, thereby affecting the selectivity and rate of the reaction. In reactions involving intermolecular interactions, the steric hindrance effect is particularly significant.
In addition, the naphthalene group in this compound has a unique chemical activity. The naphthalene ring is more reactive than the benzene ring and can undergo various reactions such as oxidation and reduction. Under appropriate oxidation conditions, naphthalene groups can be oxidized to corresponding quinones; under reduction conditions, hydrogenation reactions can occur to partially or completely reduce the double bonds of naphthalene rings.
2% 2C3 -diethyl-1 -naphthalene-4 -methoxybenzene The chemical properties are determined by the interaction of various parts in its molecular structure, and may have unique applications and reaction characteristics in organic synthesis, materials science and other fields.

To prepare 2,3-diene-1-cyano-4-methoxyphenyl, there are three methods.
One is the alkenylation method. First, methoxybenzaldehyde is taken, catalyzed by a base, and placed in a reactor with phosphorus-ylide reagent. The temperature is controlled moderately, and the stirring should be carried out. This is the Vittig reaction, which can be formed into alkenyl anisole. After that, the cyanide halide reagent is reacted with it in a suitable solvent in a specific ratio, and the alkenyl product containing the cyanide group is obtained by substitution. This step is clear, but the purity of the reagent and the reaction conditions are strict, and the yield is affected if it is slightly worse.
The second is the hydrogenation method after alkynylation. First, methoxybenzene is used as the beginning, and halogenated methoxybenzene is obtained. Then it reacts with alkynyl lithium reagent or Grignard reagent at low temperature and under the protection of inert gas to form alkynyl methoxybenzene. Then, in the method of catalytic hydrogenation, a suitable catalyst, such as palladium carbon, is selected, and the hydrogen pressure and temperature are controlled to partially hydrogenate the alkynyl group to obtain a diene structure, and the cyanyl group can be introduced according to the specific reagents and conditions before and after the alkynylation step. Although this method is a little complicated, the reaction of each step has good controllability and the purity of the product is easily improved.
The third is the cyclization rearrangement Selecting suitable unsaturated nitriles and methoxybenzene derivatives, under the catalysis of specific catalysts, such as metal-organic complexes, the carbon skeleton of the target molecule is directly constructed through intramolecular cyclization and rearrangement reaction. This approach has high atomic economy, simple steps, but requires high catalyst requirements, and the reaction mechanism is complex. It requires fine regulation of reaction parameters to obtain the ideal yield and selectivity.
All these methods have their own advantages and disadvantages. The actual preparation should be weighed against many factors such as raw material availability, cost and product purity requirements.

I think what you are asking is about the price range of "2,3-diene-1-alkynyl-4-methoxyphenyl" in the market. However, the price of this chemical product is affected by many factors, and it is difficult to sum it up.
First, the difficulty of preparation is the key. If the preparation requires complicated steps, special raw materials or harsh conditions, the price must be high. Because it consumes a lot of manpower, material resources and financial resources. Second, the amount of market demand also affects the price. If the demand is strong and the supply is in short supply, the price will rise; if the demand is small and the supply exceeds the demand, the price will fall. Third, the purity is closely related to the price. Those with high purity are expensive because of the difficulty in purification; those with low purity are relatively cheap.
Generally speaking, in the chemical reagent market, such more special chemical substances, if they are ordinary purity, may cost between tens and hundreds of yuan per gram. If they are high purity and used for special scientific research and other purposes, the price per gram may exceed 1,000 yuan, or even higher. However, this is only a rough guess. The actual price needs to be consulted with major chemical reagent suppliers in detail, according to their specific prices. Due to the fickle market conditions, prices also fluctuate.