4-Methoxy-3-phenylglycolic acid, also known as vanilmandelic acid, has a wide range of uses.
In the field, this is an important compound. In bed, it is often used as an important indicator of xanthophyloma. The content of vanilmandelic acid in human urine can reflect the replacement of xanthophyllamine. In patients with xanthophyloma, the secretion of xanthophyllamine is often increased, resulting in an increase in the excretion of vanilmandelic acid in the urine. By measuring the content of vanilmandelic acid in the urine, it can provide a strong basis for xanthophyloma, and help the patient make a judgment and formulate a suitable treatment plan.
In terms of chemical synthesis, 4-3-methoxyphenylglycolic acid also plays an indispensable role. Due to its special chemical properties, it can be used as a medium for the synthesis of many bioactive compounds. For example, some chemical molecules with specific physiological activities need to be synthesized with the help of vanilla mandelic acid, which can be reacted by a series of refined chemicals to generate the required chemical molecules, so as to provide the specific therapeutic effects of the chemical.
In addition, in some biological chemical studies, this compound can be used to investigate the cellular signaling pathway and substitution. Researchers have studied the degree of vanillic mandelic acid or its phase substitution, observed the transformation of cellular physiological functions, and gained in-depth insights into the biochemical process of biological and biological research. Therefore, 4-methoxyphenylglycolic acid plays an important role in many fields such as research, chemical synthesis and biological chemistry.

4-Hydroxy-3-methoxyphenylglycolic acid, its properties are white to light yellow crystalline powder, odorless, slightly bitter taste. Melting point is about 148-152 ° C, easily soluble in hot water and ethanol, slightly soluble in ether and chloroform.
This substance is relatively stable at room temperature, and is prone to decomposition and deterioration when exposed to light, heat or contact with strong oxidants. Its aqueous solution is acidic, with a pH value of about 3-5. It can be stored for a long time in a dry environment. If the ambient humidity is high, it may absorb moisture and agglomerate.
4-Hydroxy-3-methoxyphenylglycolic acid has unique solubility characteristics in organic solvents. In ethanol, hydrogen bonds can be formed between molecules, so it has good solubility; in non-polar solvents such as ether and chloroform, it can only be slightly soluble due to molecular polarity differences. Its melting point characteristics also reflect the state of intermolecular forces, and the specific melting point range indicates the regularity and stability of its molecular structure.
In chemical reactions, due to the activity of hydroxyl groups, methoxy groups and carboxyl groups, it can participate in esterification, etherification, neutralization and many other reactions, which are all based on its unique physical properties. Its acidity originates from the ionization of carboxyl groups, which can neutralize with bases in solution to generate corresponding salts. In the field of organic synthesis, these physical properties provide many possibilities for it to participate in the synthesis of various complex compounds as an important intermediate.

4-Alene-3-methoxyphenylacetic acid is an organic compound containing alkenyl, methoxy and phenylacetic acid structural units. Its chemical properties are unique and have attracted much attention in the fields of organic synthesis and medicinal chemistry.
The alkenyl group is active in nature and has typical carbon-carbon double bond characteristics. Addition reactions can occur, such as electrophilic addition with halogens (bromine, chlorine), to generate halogenated hydrocarbons. The reaction conditions are mild and often carried out in organic solvents at room temperature or low temperature. Under the action of catalysts (such as palladium-carbon), hydrogenation reactions can occur with hydrogen to generate saturated hydrocarbons, which can realize the reduction of alkenyl groups. The alkenyl group can also participate in the oxidation reaction. Under the action of specific oxidants (such as ozone and potassium permanganate), the double bond breaks, and different oxidation products such as alcaldes, ketones or carboxylic acids are formed according to the reaction conditions and the type of oxidant. The
methoxy group acts as a power supply group, which has a significant impact on the electron cloud density of the benzene ring. It increases the electron cloud density of the ortho and para-position of the benzene ring, making the benzene ring more prone to electrophilic substitution. For example, under appropriate conditions, the phenyl ring of this compound can be alkylated with halogenated hydrocarbons catalyzed by Lewis acid (such as aluminum trichloride), and alkyl groups can be introduced into the benzene ring; it can also be acylated with acyl halides to introduce acyl groups,
Phenylacetic acid part, the carboxyl group is acidic, can neutralize with bases to form corresponding carboxylic salts, which have good solubility in water. Moreover, the carboxyl group can participate in the esterification reaction, react with alcohols under the catalysis of concentrated sulfuric acid to form ester compounds, which are often used in organic synthesis to prepare esters with specific functions and expand the application range of compounds.
4-ene-3-methoxyphenylacetic acid has become a key intermediate in the field of organic synthesis due to these chemical properties, which can be used to construct complex organic molecules; in pharmaceutical chemistry, it may exhibit unique biological activities due to these structures and properties, providing an important direction for drug development.

To prepare 4-ene-3-methoxyphenylacetic acid, you can do it from the following ways.
First, starting with benzene, alkylation through Fu-gram, introduction of alkyl groups, and then halogenation, hydrolysis and other steps to convert alkyl groups to carboxyl groups. At the same time, at a suitable stage, methoxy groups are introduced by nucleophilic substitution and other methods. After multi-step reactions, the required carbon frame and functional groups are gradually constructed.
Second, benzene derivatives with suitable substituents are used as starting materials. If the starting material contains methoxy groups, the fragment containing alkenyl groups can be introduced by means of Grignard reaction, etc., and then the alkenyl groups can be further converted. At the same time, try to introduce carboxyl groups at appropriate positions. For example, first react with halogenated alkenes to form carbon-carbon bonds, and then oxidize to obtain carboxyl groups.
Third, some natural products or compounds with similar skeletons can also be used as raw materials. Through the modification and transformation of its specific functional groups, the synthesis of the target product can be achieved. For example, those with benzene rings and alkenyl groups and other similar structures are selected, and 4-ene-3-methoxyphenylacetic acid is obtained through protection, de-protection, and precise operations such as carboxylation and methoxylation.
The key to synthesis lies in precisely controlling the reaction conditions, such as temperature, pH, catalyst selection, etc., to ensure the selectivity and yield of each step of the reaction. It is necessary to pay attention to the interaction between functional groups, protect and de-protect in time, so as to achieve the synthesis of 4-ene-3-methoxyphenylacetic acid efficiently and orderly.

I have not heard of the price range of "4-Jiang-3-Methylhydroxyphenylacetic acid" on the market. The name of this compound, or a specific chemical substance, is not known to me as an ordinary commercial substance.
If you want to know the price range on the market, you should visit the chemical market and chemical reagent suppliers. Practitioners there often know the price of various chemical substances. Or you can search for its traces on the online chemical material trading platform and observe the prices marked by various companies to indicate its price range.
However, these substances may involve special controls, and their transactions may be subject to regulations and are not available at will. And when checking its price, the supplier's qualification and reputation must be carefully reviewed to avoid fraud. If you want to use it, you should also follow safety regulations and should not be careless.