My watch list  

Isolation of Functionalized Phenolic Monomers through Selective Oxidation and CO Bond Cleavage of the β‐O‐4 Linkages in Lignin


Functionalized phenolic monomers have been generated and isolated from an organosolv lignin through a two‐step depolymerization process. Chemoselective catalytic oxidation of β‐O‐4 linkages promoted by the DDQ/tBuONO/O2 system was achieved in model compounds, including polymeric models and in real lignin. The oxidized β‐O‐4 linkages were then cleaved on reaction with zinc. Compared to many existing methods, this protocol, which can be achieved in one pot, is highly selective, giving rise to a simple mixture of products that can be readily purified to give pure compounds. The functionality present in these products makes them potentially valuable building blocks.

Lignin nutzbar gemacht: Eine zweistufige Methode bestehend aus der selektiven aeroben Oxidation benzylischer Ligninalkohole mit DDQ/tBuONO/O2 und der anschließenden Spaltung der β‐O‐4‐Bindungen mit metallischem Zink liefert funktionalisierte kleine Moleküle. Die Produkte sind nützliche Bausteine für die Produktion von Feinchemikalien und Materialien aus Biomasse.

Authors:   Christopher S. Lancefield, O. Stephen Ojo, Fanny Tran, Nicholas J. Westwood
Journal:   Angewandte Chemie
Year:   2014
Pages:   n/a
DOI:   10.1002/ange.201409408
Publication date:   05-Nov-2014
More about Angewandte Chemie
  • News

    Methane from Carbon Dioxide

    Recycling carbon dioxide (CO2), especially through conversion to methane (CH4), is compelling while anthropogenic CO2 emissions are still rising. A useful process for this transformation is photothermal methanation, in which CO2 and hydrogen are catalytically converted into CH4 and water u ... more

    Liquid Fuels from Carbon Dioxide

    A new electrocatalyst called a-CuTi@Cu converts carbon dioxide (CO2 ) into liquid fuels. As reported by a team of Chinese researchers in the journal Angewandte Chemie, active copper centered on an amorphous copper/titanium alloy produces ethanol, acetone, and n-butanol with high efficiency. ... more

    Anionic Nickel

    Metal catalysts are widely used in the production of drugs, dyes, adhesives, and plastics. Researchers have now discovered an intriguing property of nickel as a catalyst: it is able to catalyze the coupling of aromatic hydrocarbons in its anionic form, the nickelate ion. In this form, the t ... more

More about Wiley
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE