English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The α-hydroxyl group in lignin model compounds 1-(3,4-dimethoxyphenyl)-2-(2-methoxyphenoxy)-1,3-propanediol ( 1 ) and 1-(4-hydroxy-3-methoxyphenyl)ethanol ( 3 ), and the α-carbonyl group in 1-(3,4-dimethoxyphenyl)-2-(2-methoxyphenoxy)ethan-1-one ( 5 ) are removed by treatment of the model compounds with trifluoroacetic acid (CF 3 CO OH) and triethylsilane (Et3sih) in methylene chloride. The reaction is highly chemoselective and it tolerates the lignin γ-hydroxyl group, phenol and β-O-4-aryl ether linkage. The α-hydroxyl group in  1  has also been removed with triethylsilane in aqueous trifluoroacetic acid (CF 3 CO OH : H 2 o = 75 : 25).

holzforschung

A New Approach Towards the Yellowing Inhibition of Mechanical Pulps. Part I: Selective Removal of α-Hydroxyl and α-Carbonyl Groups in Lignin Model Compounds