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Monday, 11 January 2016

Continuous ruthenium-catalyzed methoxycarbonylation with supercritical carbon dioxide




Catal. Sci. Technol., 2016, Advance Article
DOI: 10.1039/C5CY01883H, Paper
Stefan Christiaan Stouten, Timothy Noel, Qi Wang, Matthias Beller, Volker Hessel
The methoxycarbonylation of cyclohexene with carbon dioxide over a ruthenium catalyst was realized in a micro flow system under supercritical conditions.

Continuous ruthenium-catalyzed methoxycarbonylation with supercritical carbon dioxide

The methoxycarbonylation of cyclohexene with carbon dioxide over a ruthenium catalyst was realized in a micro flow system under supercritical conditions. Instead of the toxic and flammable carbon monoxide, this process utilizes carbon dioxide, thereby avoiding issues with bulk transportation of carbon monoxide as well as eliminating the need for safety precautions associated with the use of carbon monoxide. Obtained was a 77% yield of the ester product at 180 °C, 120 bar and with a 90 min residence time, which is over five times faster than for the same reaction performed under subcritical conditions in batch. An important factor for the performance of the system was to have a sufficiently polar supercritical mixture, allowing the catalyst to dissolve well. The optimal temperature for the reaction was 180 °C, as the activity of the system dropped considerably at higher temperatures, most likely due to catalyst deactivation.


Department of Chemical Engineering and Chemistry

ir. S.C. (Stefan) Stouten –

Stouten, ir. S.C.
Address:
Technische Universiteit Eindhoven
P.O. Box 513
5600 MB EINDHOVEN
Department:
Department of Chemical Engineering and Chemistry
Section:
Micro Flow Chemistry and Process Technology
Positioncategory:
doctoral candidate (PhD) (PhD Stud.)
Position:
doctoral candidate
Room:
STW 0.
Email:
s.stouten@tue.nl



Volker Hessel

prof.dr. V. (Volker) Hessel

Hessel, prof.dr. V.
Address:
Technische Universiteit Eindhoven
P.O. Box 513
5600 MB EINDHOVEN
Chair:
Micro Flow Chemistry and Process Technology
Department:
Department of Chemical Engineering and Chemistry
Section:
Micro Flow Chemistry and Process Technology
Positioncategory:
Professor (HGL)
Position:
Full Professor
Room:
STW 1.45
Tel:
+31 40-247 2973
Tel (internal):
2973
Email:
v.hessel@tue.nl
////////Continuous,  ruthenium-catalyzed,  methoxycarbonylation, supercritical carbon dioxide, flow reactor

Monday, 28 December 2015

New Drug Approvals blog by Dr Anthony Crasto hits ten lakh views in 211 countries


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New Drug Approvals hits ten lakh views in 211 countries
http://newdrugapprovals.org/




 
ANTHONY MELVIN CRASTO
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