Diisopropyl azodicarboxylate, with the CAS number 2446-83-5, is a well - known chemical compound. It appears as a yellow liquid at room temperature. Its molecular formula is C₈H₁₄N₂O₄, and its molecular weight is approximately 202.21 g/mol.
It has a boiling point in the range of around 75 - 77°C at 0.05 mmHg. The density of this compound is about 1.063 g/mL at 25°C. Diisopropyl azodicarboxylate is soluble in common organic solvents such as toluene, dichloromethane, and ethyl acetate, but it is insoluble in water.
Diisopropyl azodicarboxylate is widely used in the field of organic synthesis. One of its primary applications is as a reagent in the Mitsunobu reaction. In this reaction, it serves as an oxidizing agent, facilitating the conversion of alcohols into various functional groups such as esters, ethers, and amines.
It is also used in the synthesis of pharmaceuticals. Many drug intermediates require the use of diisopropyl azodicarboxylate to build specific molecular structures. Additionally, in the polymer industry, it can be used as a free - radical initiator for polymerization reactions, helping to control the molecular weight and structure of polymers.
When using diisopropyl azodicarboxylate, proper safety precautions must be taken. It should be stored in a cool, dry place away from heat sources and strong oxidizing agents.
In organic synthesis reactions, it is typically added drop - wise to the reaction mixture under an inert atmosphere, such as nitrogen or argon. The reaction temperature should be carefully controlled to ensure the efficiency and selectivity of the reaction. Usually, reactions involving diisopropyl azodicarboxylate are carried out at relatively low temperatures, often between 0°C and room temperature.
After the reaction, appropriate work - up procedures should be followed. The reaction mixture may need to be washed with water or aqueous solutions to remove by - products, and then dried and purified by methods such as column chromatography or recrystallization.
Case 1: Pharmaceutical Synthesis
A research group was working on the synthesis of a new anti - cancer drug. They needed to convert a specific alcohol intermediate into an ester. By using diisopropyl azodicarboxylate in a Mitsunobu reaction, they were able to achieve this conversion with high yield and selectivity. The reaction was carried out in toluene at 0°C, and the product was purified by column chromatography. The successful synthesis of the ester intermediate was a crucial step in the overall drug synthesis process.
Case 2: Polymerization Reaction
A polymer manufacturing company wanted to produce a polymer with a specific molecular weight and structure. They used diisopropyl azodicarboxylate as a free - radical initiator. By carefully controlling the amount of initiator and the reaction conditions, they were able to produce a polymer with the desired properties. The polymer was then used in the production of high - performance plastics, which were used in the automotive industry for making lightweight parts.
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