From Theozymes to Artificial Enzymes: Enzyme-Like Receptors for Michael Additions with Oxyanion Holes and Active Amino Groups
作者:Luis Simón、Francisco M. Muñiz、Silvia Sáez、César Raposo、Joaquín R. Morán
DOI:10.1002/ejoc.200700565
日期:2007.10
Different artificial enzymes, based on the theozyme concept, have been designed for Michael additions of pyrrolidine to α,β-unsaturated lactams. These molecules each have skeleton able to mimic a structure called an “oxyanion hole”, as is present in many enzymes. Amine groups are also responsible for the catalytic activities of these receptors, since they support the important proton-transport step
不同的人工酶,基于theozyme 概念,已被设计用于将吡咯烷迈克尔加成到α,β-不饱和内酰胺。这些分子中的每一个都具有能够模拟称为“氧阴离子孔”的结构的骨架,正如许多酶中存在的那样。胺基团也负责这些受体的催化活性,因为它们支持重要的质子传输步骤。根据反应机理和理论计算确定了对胺基团的要求。考虑到受体与底物的相对缔合常数,讨论了受体的催化活性:获得了高达 104 的 kcat/kuncat 值。受体的催化活性与在天然酶和催化抗体中发现的那些进行比较。(© Wiley-VCH Verlag GmbH & Co. KGaA,