First, the synthesis of diethylallyl malonate
Synthesis of diethylallyl malonate requires delicate control of various reaction conditions. Allyl halide and diethyl malonate are often used as starting materials, and under the action of alkaline catalysts such as sodium alcohol, it is carried out according to the mechanism of nucleophilic substitution. In this process, the intensity of the alkaline environment, the ratio of reactants, the reaction temperature and time are all key factors. If the alkalinity is too strong, side reactions may occur; if the temperature is too high, the reaction may be out of control. Only by accurately grasping each parameter can high-purity two-ethylallyl malonate be obtained. For example, using sodium ethanol as a catalyst, under moderate heating and nitrogen protection, strictly controlling the molar ratio of allyl halide to diethyl malonate to an appropriate value can make the reaction advance efficiently and the product yield is considerable.

Second, the characteristics of properties
Its physical properties are unique. It is often a colorless to light yellow transparent liquid with a special odor. Physical constants such as boiling point, melting point, and density are closely related to the molecular structure. From a chemical perspective, because its molecular structure contains ester groups and allyl groups, it has both reactivity. Ester groups can undergo hydrolysis, alcoholysis, etc., while allyl groups can participate in addition, oxidation, and many other reactions. This dual activity endows diethylallyl malonate with a unique position in the field of organic synthesis. For example, under mild basic conditions, ester groups can be slowly hydrolyzed to form corresponding carboxylic salts and alcohols; while allyl groups can be added to hydrogen halides in the presence of suitable catalysts, enriching their derivatization pathways.

III. APPLICATIONS
In the field of organic synthesis, diethylallyl malonate is an important intermediate. With the active groups in its molecules, complex organic molecular structures can be constructed through various reactions. In drug synthesis, it is often used as a key building block for the synthesis of compounds with specific pharmacological activities. For example, by ingeniously designing the reaction route, using its allyl group and ester group reaction, some anticancer drug precursor compounds can be synthesized, providing an important material basis for the development of new drugs. In the field of materials science, with appropriate modification, it can be used to prepare polymer materials with special properties. Using its double bonds can participate in the polymerization reaction, thereby endowing the material with unique physical and chemical properties, such as improving the flexibility and thermal stability of the material.