Dynamic combinatorial libraries ligand

L., Granata, C., O Reilly, M., Wyatt, P.G., Jhoti, H. Detection of ligands from a dynamic combinatorial library by X-ray crystallography. Angew. Chem. Int. Ed. Engl. 2003, 42, 4479-4482. 

Figure 3.5 Disulfide-based dynamic combinatorial library selects for peptidic tiomodi-sulfide P-P and acridone-peptide heterodisulfide A-P G-quadruplex DNA ligands.

Figure 3.11 Left Fluorescence-based RBDCC screen. One pool of resin (pool 7) from the screen exhibits significant fluorescence, and as such a small-molecule ligand for the target DNA. Right Selected homodisulfide resin-bound dynamic combinatorial library member that selectively binds DNA Sequence 2.

Nielsen, M. C. Ulven, T. Selective extraction of G-quadruplex ligands from a rationally designed scaffold-based dynamic combinatorial library. Chem. Ear. J. 2008,14, 9487-9490. 

McNaugton, B. R. Gareiss, P. C. Miller, B. L. Identification of a selective small-molecule ligand for HIV-1 frameshift-inducing stem-loop RNA from an 11,325 member resin bound dynamic combinatorial library. J. Am. Chem. Soc. 2007, 129(37), 11306-11307. 

Bugaut, A. Bathany, K. Scmitter, J.-M. Rayner, B. Target-induced selection of ligands from a dynamic combinatorial library of mono- and bi-conjugated oligonucleotides. Tetrahedron Lett. 2005, 46, 687-690. 

Kay Severin s group has previously investigated the preparation of dynamic combinatorial libraries of metallo-macrocycles for use as sensors for Li+ at physiologically relevant conditions [59]. For example, they have found that ligand 62 and metal complexes 63 undergo a self-assembly process to yield the trimeric complexes depicted in Scheme 4.15 [60]. Mixtures of 64 and... 

Milanesi, L., Hunter, C.A., Sedelnikova, S.E., Waltho, J.P. Amplification of bifunctional ligands for calmodulin from a dynamic combinatorial library. Chem. Eur. J. 2006, 12, 1081-1087. 

Figure 12.22 HPLC trace of a disulfide dynamic combinatorial library (a) with and (b) without addition of calmodulin. Dots indicate the peaks enhanced by the protein (Copyright Wiley VCH Verlag GmbH Co. KGaA. Reproduced by permission) (c) the chemical structure of the amplified ligand.

Certain ligand structures are certain to be favored, and others not present at all ( virtual ) [26]. Likewise, certain metal complexes are thermodynamically more stable than others. Since dynamic interconversion is possible on both covalent and supramolecular levels, both ligand and metal preferences may act in concert to amplify a limited subset of structures out of the dynamic library of all possible structures. The preparation of 1 thus represents a sorting of the dynamic combinatorial library of Figure 1.2. 

Scheme 1.13 The formation of a dynamic combinatorial library of ligands, and the collapse of this library into complexes 14 and 15 following the addition of Cu1 and Fe".

Figure 8.53 Dynamic combinatorial libraries receptor-driven ligand library selection (top) and ligand-driven receptor library selection (bottom).

Fig. 4. A virtual dynamic combinatorial library of oligomeric circular helicates generated from a tritopic tris(2,2 -bipyridine) ligand and metal ions of octahedral coordination. AH constituents of the dynamic library are potentially accessible at any time by reversible interconversion.

Abstract This review presents an overview of the area of anion-templated synthesis of molecules and supramolecular assemblies. The review is divided into two main sections the first part deals with anion-templated systems where the final products are linked by bonds that are not reversible under the conditions of the experiment Several recent examples of macrocycles, cages and interlocked species are presented in this section. The second part of the chapter, presents a discussion of anion-templation in systems containing reversible bonds that give rise to dynamic combinatorial libraries (either by formation of coordination metal-ligand bonds or by reversible covalent bonds). 

Fig. 5 Mixing di- and tripyridyl ligands (7-11) with Pd(en) produces a diverse dynamic combinatorial library of cyclic and cage coordination compounds. Exposure of this library to sodium trichloroacetate (12) results in the amplification of a new receptor. (Adapted from Ref. [17].)...

Constable. E.C. Housecroft. C.E. Kulke, T. Lazzarini. C. Schofield, E.R. Zimmermann, Y. Redistribution of terpy ligands—Approaches to new dynamic combinatorial libraries. J. Chem. Soc.. Dalton Trans. 2001. 2864-2871. 

ESI-MS/MS using an FT-ICR mass spectrometer also enables direct screening of dynamic combinatorial library (DCL) [106]. The protein-Ugand complexes are selectively trapped and dissociated to facilitate selective identification of the DCL ligands. 

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