Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Katalysator zur asymmetrischen Olefinmetathese,

20.01.2010
Die homogen katalysierte Olefinmetathese hat sich in den vergangenen Jahrzehnten zu einem bedeutenden Wirtschaftszweig entwickelt und stellt eine am häufigsten eingesetzte Transformation in der modernen chemischen Synthese dar. Allerdings eignet sich die homogen katalysierte Olefinmetathese derzeit noch nicht für die asymmetrische Katalyse.

Bisher wurden im Bereich der Grubbs II Katalysatoren die folgenden Ansätze verfolgt: der Einsatz monodentaler nicht-funktionaler N-heterocyclischer Carbenliganden (NHC) mit chiralen Zentren im Imidazolring oder in der Seitenkette sowie der Einsatz funktionalisierter NHC auf Basis des 1,1’-Binaphthyls zur Bildung eines Chelatli-ganden. Jedoch haben die chiralen NHC bisher nicht die gewünschte Leistung in der asymmetrischen Katalyse erbracht. Der essentielle Nachteil der NHC zeigt sich bei der Enantiomerenverteilung der Produkte, welche die Erwartungen nicht erfüllt. Mit Hilfe des erfindungsgemäßen Verfahrens kann die Gewinnung enantiomerenreiner Produkte möglich werden. Im Gegensatz zu vielen synthetischen Ansätzen wird in biologischen Systemen oft totale Enantioselektivität erreicht.

Further Information: PDF

PVA Mecklenburg-Vorpommern AG
Phone: +49 (0)381/49 74 74 0

Contact
Moritz v. GrotthussDr. Rüdiger Werp

info@technologieallianz.de | TechnologieAllianz e.V.
Further information:
http://www.technologieallianz.de/angebote.php?sort=sag&id=1882&lang=en
http://www.technologieallianz.de

More articles from Technology Offerings:

nachricht New Lithium Salts of Pentafluorophenylamide Anions as Electrolytes in Lithium Ionic Batteries
18.04.2017 | TechnologieAllianz e.V.

nachricht Gratings on glass surfaces
28.03.2017 | TechnologieAllianz e.V.

All articles from Technology Offerings >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: 3-D scanning with water

3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects

A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...

Im Focus: Manipulating Electron Spins Without Loss of Information

Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.

For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...

Im Focus: The proton precisely weighted

What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.

To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...

Im Focus: On the way to a biological alternative

A bacterial enzyme enables reactions that open up alternatives to key industrial chemical processes

The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....

Im Focus: The 1 trillion tonne iceberg

Larsen C Ice Shelf rift finally breaks through

A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Closing the Sustainability Circle: Protection of Food with Biobased Materials

21.07.2017 | Event News

»We are bringing Additive Manufacturing to SMEs«

19.07.2017 | Event News

The technology with a feel for feelings

12.07.2017 | Event News

 
Latest News

Ultrathin device harvests electricity from human motion

24.07.2017 | Power and Electrical Engineering

Scientists announce the quest for high-index materials

24.07.2017 | Materials Sciences

ADIR Project: Lasers Recover Valuable Materials

24.07.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>