Biomimetic hydrogen-bonding cascade for chemical activation: telling a nucleophile from a base
作者:Hyunchang Park、Dongwhan Lee
DOI:10.1039/d0sc05067a
日期:——
Hydrogen bonding-assisted polarization is an effective strategy to promote bond-making and bond-breaking chemical reactions. Taking inspiration from the catalytic triad of serine protease active sites, we have devised a conformationally well-defined benzimidazole platform that can be systematically functionalized to install multiple hydrogen bonding donor (HBD) and acceptor (HBA) pairs in a serial
氢键辅助极化是促进成键和断键化学反应的有效策略。从丝氨酸蛋白酶活性位点的催化三联体中汲取灵感,我们设计了一个构象明确的苯并咪唑平台,该平台可以系统地功能化,以串行方式安装多个氢键供体 (HBD) 和受体 (HBA) 对。我们发现,越来越多的相互依赖和相互增强的 HBD-HBA 接触促进了荧光猝灭醛基与氰化物离子的成键反应,同时抑制了不希望的 Brønsted 酸碱反应。最先进的系统,通过迭代的规则发现研究发展起来,对 CN 做出快速和选择性的反应-在λ max = 450 nm 处产生大的(> 180 倍)荧光强度增强。