New Polymer-Supported Mono- and Bis-<i>Cinchona</i>Alkaloid Derivatives: Synthesis and Use in Asymmetric Organocatalyzed Reactions
作者:Ravindra P. Jumde、Anila Di Pietro、Antonella Manariti、Alessandro Mandoli
DOI:10.1002/asia.201402924
日期:2015.2
Chinchona alkaloids and their application in the asymmetric dimerization of ketenes is reported. Six different immobilized derivatives, consisting of three dimeric and two monomeric 9‐O ethers, were prepared by “click” anchoring of soluble alkaloid precursors on to azidomethyl resins. The resulting insoluble polymer‐bound (IPB) organocatalysts were employed for promoting the dimerization of in‐situ
Peptide stapling is a strategy for improving the biological properties of peptides. Herein, we report a novel method for stapling peptides that utilizes bifunctional triazine moieties for two-component conjugation to the phenolic hydroxyl groups of tyrosine, which enables efficient stapling of unprotected peptides. In addition, we applied this strategy to the RGD peptide that can target integrins and