Featuring the dendrimer‐like properties, the cross‐linked small‐molecule micelles (cSMs) have been shown to be a good alternative to dendrimers in many applications. Following this trend, herein the copper(I)‐chelated cross‐linked cyclen micelles (CuI@cCMs) were created as a nanocatalyst for azide‐alkyne cycloaddition. Both alkynes and azides with diverse structures performed with excellent reactivity
交联的小分子胶束(cSM)具有树状聚合物的特性,在许多应用中已被证明是树状聚合物的良好替代品。遵循这种趋势,在这里,铜(I)螯合的交联环胶束(Cu I @cCMs)被创建为叠氮化物-炔烃环加成反应的纳米催化剂。在百万分之几(ppm)的催化剂用量下,具有多种结构的炔烃和叠氮化物在水中均具有出色的反应活性。循环实验表明,纳米催化剂多次重复使用后,催化效率仅略有下降。重要的是,Cu I cCMs可以轻松进入细胞并进行细胞内催化以点燃和/或杀死癌细胞。
Copper Catalysis in Living Systems and In Situ Drug Synthesis
作者:Jessica Clavadetscher、Scott Hoffmann、Annamaria Lilienkampf、Logan Mackay、Rahimi M. Yusop、Sebastien A. Rider、John J. Mullins、Mark Bradley
DOI:10.1002/anie.201609837
日期:2016.12.12
azide–alkyne cycloaddition (CuAAC) reaction has proven to be a pivotal advance in chemical ligation strategies with applications ranging from polymer fabrication to bioconjugation. However, application in vivo has been limited by the inherent toxicity of the copper catalyst. Herein, we report the application of heterogeneous copper catalysts in azide–alkyne cycloaddition processes in biological systems ranging
A series of cis-restricted 1,4- and 1,5-disubstituted 1,2,3-triazole analogs of combretastatin A-4 (1) have been prepared. Cytotoxicity and tubulin inhibition studies showed that 2-methoxy-5-((5-(3,4,5-trimethoxyphenyl)-1H-1,2,3-triazol-1-yl)methyl)aniline (5e) and 2-methoxy-5-(1-(3,4,5-trimethoxybenzyl)-1H-1,2,3-triazol-5-yl)aniline (6e) were two of the most active compounds. Molecular modeling studies revealed that the N-2 and N-3 atoms in the triazole rings in 5e and 6e did not form hydrogen bonds with the amino acids in the anticipated pharmacophore. (C) 2010 Elsevier Ltd. All rights reserved.