使用化学,制备了简单的大环假肽动力学系统,该系统包含类似于已知的铵阳离子受体的环状结构。测试了一系列铵盐作为模板,并根据使用的模板以不同程度扩增了预期的受体。与冠醚的竞争性非共价相互作用被用来原位证明模板化系统仍然是动态的。ESI-MS和1 H ROESY实验证明了客体-客体复合物的形成。各种模板对分离的受体的相对亲和力与它们对文库组成产生的作用密切相关。
使用化学,制备了简单的大环假肽动力学系统,该系统包含类似于已知的铵阳离子受体的环状结构。测试了一系列铵盐作为模板,并根据使用的模板以不同程度扩增了预期的受体。与冠醚的竞争性非共价相互作用被用来原位证明模板化系统仍然是动态的。ESI-MS和1 H ROESY实验证明了客体-客体复合物的形成。各种模板对分离的受体的相对亲和力与它们对文库组成产生的作用密切相关。
Metal-ion induced amplification of three receptors from dynamic combinatorial libraries of peptide-hydrazonesElectronic supplementary information (ESI) available: NMR and IR data of the Li+ complexes of (mPF)2, (pPF)3 and (pPC)3. See http://www.rsc.org/suppdata/ob/b3/b300956d/
作者:Sarah L. Roberts、Ricardo L. E. Furlan、Sijbren Otto、Jeremy K. M. Sanders
DOI:10.1039/b300956d
日期:2003.4.23
Three building blocks of general structure (MeO)2 CH-aromatic linker-Pro-amino acid-NHNH2 have been prepared and tested in acid-catalysed dynamiccombinatoriallibraries. Exposure of these libraries to LiI and NaI led to the amplification of three macrocyclic pseudopeptide receptors. The receptors were isolated and their interactions with LiI and NaI were analysed using NMR, IR and ITC. Binding of
Synthesis of Cyclic Oligomers from Histidine-Derived Building Blocks Using Dynamic Combinatorial Chemistry
作者:Masaomi Matsumoto、Kenneth M. Nicholas
DOI:10.1021/jo701832m
日期:2007.11.1
(3-dimethoxymethylbenzoyl)-τ-benzyl-l-histidine methyl ester 2 were prepared from a histidine methyl ester and a τ-benzyl-histidine methyl ester by N-acylation with 3-(dimethoxymethyl)benzoic acid (3) followed by hydrazinolysis. Acid-promoted hydrolysis of each acetal hydrazide initially produced a library of cyclic oligomers that eventually converted to a cyclic dimer. The cyclic dimers 12 and 22 were
组氨酸衍生的酰肼缩醛单体(3- dimethoxymethylbenzoyl) -升-组氨酸甲基酯1(3-dimethoxymethylbenzoyl)-τ苄基升组氨酸甲基酯2从一个组氨酸甲酯和τ苄基组氨酸甲基制备由N个酯-酰化与3-(二甲氧基甲基)苯甲酸(3随后肼解)。每个缩醛酰肼经酸促进的水解反应最初产生了一个环状低聚物库,该文库最终转化为环状二聚体。循环二聚体1 2和2 2进行了光谱表征,并发现其带有咪唑的侧链向外(exo)定向。使用各种金属离子和阴离子底物均未观察到模板化环状低聚物的证据。通过电位滴定法确定二聚体1 2的p K a 1和p K a 2的平均值为6.6。发现二聚体1 2催化对硝基苯乙酸酯的水解比4-甲基咪唑快10倍。
Identification and Isolation of a Receptor forN-Methyl Alkylammonium Salts: Molecular Amplification in a Pseudo-peptide Dynamic Combinatorial Library
作者:Graham R. L. Cousins、Ricardo L. E. Furlan、Yiu-Fai Ng、James E. Redman、Jeremy K. M. Sanders
A cyclic pseudo-peptide receptor for acetylcholine has been amplified and isolated from a dynamiccombinatoriallibrary by virtue of templated stabilization under thermodynamic control (see scheme, TFA=trifluoroacetic acid). This is a demonstration of significant molecular amplification in dynamic systems to evolve a novel receptor.
Piperazine derivative or its salt, process for producing the same and
申请人:Toyama Chemical Co., Ltd.
公开号:US04948796A1
公开(公告)日:1990-08-14
A piperazine derivative represented by the following formula or a salt thereof: ##STR1## which is useful for curing cerebro-vascular disease and post-cerebro-vascular disease.
Photoswitchable Dynamic Combinatorial Libraries: Coupling Azobenzene Photoisomerization with Hydrazone Exchange
作者:Lindsey A. Ingerman、Marcey L. Waters
DOI:10.1021/jo801783w
日期:2009.1.2
The novel azobenzene-based monomer 1 was prepared, equipped with the necessary functionality to undergo simultaneous dynamic exchange processes: hydrazone exchange and photoisomerization. Acid-promoted hydrolysis of the azobenzene building block produced a dynamic combinatorial library of cyclic oligomers, while multibuilding block libraries were also generated upon addition of proline-based monomers. Libraries equilibrated under thermal conditions were dominated by trans isomers of the azobenzene macrocycles, whereas light-induced isomerization resulted in a conformational change of the library members to their corresponding cis-azo form. In the presence of a pentaproline template, a slower rate of thermal relaxation of the cis-azobenzene species 1(c) was observed, resulting in stabilization and amplification of this receptor due to favorable binding interactions. The facile identification and application of such photoswitchable receptors have the potential to allow for greater control over molecular recognition events.