Histidine-Containing Peptide Catalysts Developed by a Facile Library Screening Method
作者:Kengo Akagawa、Nobutaka Sakai、Kazuaki Kudo
DOI:10.1002/anie.201410268
日期:2015.2.2
resin‐bound peptides through reductive amination to visualize active catalysts. This procedure allows for the monitoring of the reactivity of entire peptides without modifying the resin beads beforehand. Peptidescontaininghistidine at an appropriate position were identified by this method. A novel function of the histidyl residue, which enhances the binding of a substrate to the catalyst by capturing an iminium
Exploration of Structural Frameworks for Reactive and Enantioselective Peptide Catalysts by Library Screenings
作者:Kengo Akagawa、Junichi Satou、Kazuaki Kudo
DOI:10.1021/acs.joc.6b01591
日期:2016.10.7
By screening large-scale N-terminal l-prolyl peptide libraries, we explored efficient catalysts for asymmetric Michael addition of a malonate to an enal. The catalytically active peptides obtained by the screening could be categorized into two groups based on the similarity of amino acid sequences. One group of the peptides selectively gave an S-product, whereas the other gave an R-product, despite
Hollow structural effect of microporous organocatalytic polymers with pyrrolidines: dramatic enhancement of catalytic performance
作者:Kyoungil Cho、Jin Yoo、Hyeong-Wan Noh、Sang Moon Lee、Hae Jin Kim、Yoon-Joo Ko、Hye-Young Jang、Seung Uk Son
DOI:10.1039/c7ta02404e
日期:——
Hollow and microporous organocatalytic polymers bearing pyrrolidines (H-MOP-P) were prepared by template synthesis and post-synthetic modification and showed enhanced performance, compared to nonhollow ones.
Enantioselective organocatalytic Michael addition of malonates to α,β-unsaturated aldehydes in water
作者:Anqi Ma、Shaolin Zhu、Dawei Ma
DOI:10.1016/j.tetlet.2008.03.051
日期:2008.5
The Michaeladdition of malonates to α,β-unsaturated aldehydes catalyzed by O-TMS protected diphenylprolinols and acetic acid in water occurs at 0 °C to rt. In most cases, the reaction runs to completion in less than 24 h. A wide range of aldehydes including β-aryl, β-alkyl and β-alkenyl acroleins are found to be compatible with these conditions, providing the corresponding adducts in good yields and
Enantioselective oxidative domino reactions of allylic alcohols to functionalized aldehydes have been developed. The one pot domino oxidation-iminium activation represents a convenient strategy for the enantioselective addition of malonates to allylic alcohols and the asymmetric formation of formyl cyclopropanes.