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Anti-malaria drug synthesized with the help of oxygen and light
Date:1/17/2012

eact with molecules to form peroxides.

800 photoreactors should suffice to cover the global requirement for artemisinin

"Photochemistry is a simple and cost-effective method. However, the pharmaceutical industry has not used it to date because it was so difficult to control and implement on a large scale," explains Peter Seeberger. In the large reaction vessels with which industrial manufacturers work, flashes of light do not penetrate deeply enough from outside and the reactive form of oxygen is not produced in sufficient volumes. The Potsdam-based scientists have succeeded in resolving this problem using an ingenious trick: They channel the reaction mixture containing all of the required ingredients through a thin tube that they have wrapped around a UV lamp. In this structure, the light penetrates the entire reaction medium and triggers the chemical conversion process with optimum efficiency.

"The fact that we do not carry out the synthesis as a one-pot reaction in a single vessel, but in a continuous-flow reactor enables us to define the reaction conditions down to the last detail," explains Peter Seeberger. After just four and a half minutes a solution flows out of the tube, in which 40 percent of the artemisinic acid has become artemisinin.

"We assume that 800 of our simple photoreactors would suffice to cover the global requirement for artemisinin," says Peter Seeberger. And it could all happen very quickly. Peter Seeberger estimates that the innovative synthesis process could be ready for technical use in a matter of six months. This would alleviate the global shortage of artemisinin and exert considerable downward pressure on the price of the associated drugs.


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Contact: Dr. Peter Seeberger
peter.seeberger@mpikg.mpg.de
49-331-567-9301
Max-Planck-Gesellschaft
Source:Eurekalert  

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