We here found that while Meldrum's acid as the reactive warhead allows for the attachment of a single chemical modification on aldehyde-containing proteins, pyrazolone derivatives in combination with a phosphine nucleophile enable protein dual site-specific conjugation with the same or distinct moieties. These reactions are efficient and convergent under biocompatible conditions and allow access to
Unexpected Acid‐Triggered Formation of Reversibly Photoswitchable Stenhouse Salts from Donor‐Acceptor Stenhouse Adducts
作者:Yuriy Shpinov、Antoine Schlichter、Philippe Pelupessy、Thomas Le Saux、Ludovic Jullien、Beatrice Adelizzi
DOI:10.1002/chem.202200497
日期:2022.5.16
In acidic conditions, the end-groups of water-soluble donor-acceptor Stenhouse adducts exhibit an unexpected fast scrambling, which generates attractive reversibly photoswitchable Stenhouse salts.
Efficient Site‐Selective Immobilization of Aldehyde‐Tagged Peptides and Proteins by Knoevenagel Ligation
作者:Nils Janson、Tobias Heinks、Tobias Beuel、Sarfaraz Alam、Matthias Höhne、Uwe T. Bornscheuer、Gabriele Fischer von Mollard、Norbert Sewald
DOI:10.1002/cctc.202101485
日期:2022.1.21
Superior immobilization efficiency: Pyrazolone-derivatized agarose beads enable the site-selective, bio-compatible, and efficient immobilization of aldehyde-containing small molecules, peptides and proteins by Knoevenagel condensation.
Keratin Dyeing Compositions Comprising a Radical Scavenger and a Chelant and Use Thereof
申请人:Zhang Guiru
公开号:US20110035886A1
公开(公告)日:2011-02-17
The invention relates to colorant compositions for the oxidative dyeing of keratin fibers comprising an inhibiting system of radical scavengers and chelants in the dyeing composition. The invention also relates to methods for reducing color formation outside of the keratin fiber during oxidative dyeing comprising using such colorant compositions.