让人想起生物系统中的信号转导,可以通过物理或化学信号控制其活性的人工催化剂将在设计能够响应其环境的化学系统中引起极大的兴趣。自焚化学为开发可被不同信号活化的催化剂提供了一种通用方法。为了证明该概念的多功能性,我们合成了可以被三种不同信号激活并可以用来控制两种不同反应的有机催化剂。这样,有机催化剂脯氨酸被设计为被化学信号H 2 O 2活化的前催化剂。,通过光照或青霉素酰基转移酶。助催化剂用于对醛醇缩合反应和迈克尔反应的速率进行时间控制。
Indoline Catalyzed Acylhydrazone/Oxime Condensation under Neutral Aqueous Conditions
作者:Yuntao Zhou、Irene Piergentili、Jennifer Hong、Michelle P. van der Helm、Mariano Macchione、Yao Li、Rienk Eelkema、Sanzhong Luo
DOI:10.1021/acs.orglett.0c02128
日期:2020.8.7
condensation rate underneutralconditions limits its application. Herein, indolines with electron-donating groups are reported as a new catalyst scaffold, which can catalyze acylhydrazone, hydrazone, and oxime formation via an iminium ion intermediate. This new type of catalyst showed up to 15-fold rate enhancement over the traditional aniline-catalyzed reaction at neutralconditions. The identified
A rationally designed amphiphilic poly(aryl ether)-based dendrimer self-assembles into nanomicelles and exhibits tunable morphology upon varying the hydrophilic chain length.
A toolbox for controlling the properties and functionalisation of hydrazone-based supramolecular hydrogels
作者:Jos M. Poolman、Chandan Maity、Job Boekhoven、Lars van der Mee、Vincent A. A. le Sage、G. J. Mirjam Groenewold、Sander I. van Kasteren、Frank Versluis、Jan H. van Esch、Rienk Eelkema
DOI:10.1039/c5tb01870f
日期:——
In situ multicomponent hydrogelator formation enables straightforward chemical functionalisation of supramolecular hydrogels.
Aniline Catalysed Hydrazone Formation Reactions Show a Large Variation in Reaction Rates and Catalytic Effects
作者:Fanny Trausel、Bowen Fan、Susan A. P. van Rossum、Jan H. van Esch、Rienk Eelkema
DOI:10.1002/adsc.201800342
日期:2018.7.4
find a suitable hydrazone formation reaction to investigate the activation of this pro‐catalyst, we found a wide variety in reaction rates and response to catalysis. Here we report an overview of hydrazone formation reactions, their reaction rates and response to aniline catalysis, their compatibility for kinetic analysis by UV/Vis spectroscopy, and their compatibility with the reaction environment and