Ethyl diazoacetate synthesis in flow

Area of Science:

• Organic Chemistry
• Chemical Engineering
• Process Safety

Background:

• Ethyl diazoacetate (EDA) is a valuable reagent in organic synthesis but its explosive nature restricts industrial applications.
• Current lab-scale synthesis methods pose significant safety risks for large-scale production.
• There is a need for safer, scalable methods to produce EDA on demand.

Purpose of the Study:

• To develop an inherently safe and scalable method for synthesizing ethyl diazoacetate (EDA).
• To integrate microreactor technology with separation for continuous, safe EDA production.
• To optimize reaction conditions for high yield and reduced reagent use.

Main Methods:

• Utilized a microreactor system for the continuous synthesis of EDA.
• Employed a biphasic reaction mixture of glycine ethyl ester, sodium nitrite, and dichloromethane.
• Optimized for minimal residence time and sodium nitrite concentration.
• Integrated in-line separation technology.

Main Results:

• Achieved a production yield of 20 g EDA per day using a 100 μL microreactor.
• Demonstrated inherently safe synthesis by coupling microreactor technology with separation.
• Successfully reduced residence time and sodium nitrite usage.
• Established a viable method for on-demand EDA production.

Conclusions:

• Microreactor technology offers a safe and efficient solution for producing hazardous compounds like ethyl diazoacetate.
• The developed process is scalable (scale-up or scale-out) for industrial applications.
• This approach overcomes the limitations of traditional batch synthesis for explosive materials.