Dynamic Combinatorial Chemistry with Novel Dithiol Building Blocks: Towards New Structurally Diverse and Adaptive Screening Collections
摘要:
We describe the synthesis of a range of novel dithiol-functionalized building blocks and demonstrate how they can be used to generate new structurally diverse dynamic combinatorial libraries. A proof-of-principle experiment using the catecholamine dopamine revealed that molecular recognition changed the library composition under biocompatible conditions and identified new promising candidate receptors of this biologically important neurotransmitter.
Dynamic Combinatorial Chemistry with Novel Dithiol Building Blocks: Towards New Structurally Diverse and Adaptive Screening Collections
摘要:
We describe the synthesis of a range of novel dithiol-functionalized building blocks and demonstrate how they can be used to generate new structurally diverse dynamic combinatorial libraries. A proof-of-principle experiment using the catecholamine dopamine revealed that molecular recognition changed the library composition under biocompatible conditions and identified new promising candidate receptors of this biologically important neurotransmitter.
Synthesis and Self-Inclusion of Bipyridine-Spaced Cyclodextrin Dimers
作者:Hubertus F. M. Nelissen、Martinus C. Feiters、Roeland J. M. Nolte
DOI:10.1021/jo0256641
日期:2002.8.1
The synthesis and conformational behavior of two cyclodextrindimers containing aromatic bipyridine spacers is presented. The proton NMR spectra of these dimers in aqueous solution show a doubling of signals in the aromatic region due to complete or partial self-inclusion of the spacer. The degree and the strength of self-inclusion is dependent on the substitution pattern of the bipyridine unit. This
Synthesis and binding properties of novel cyclodextrin dimers
作者:Fokke Venema、Chantal M. Baselier、Erik van Dienst、Bianca H.M. Ruël、Martinus C. Feiters、Johan F.J. Engbersen、David N. Reinhoudt、Roeland J.M. Nolte
DOI:10.1016/0040-4039(94)88343-2
日期:1994.3
The synthesis of three cyclodextrindimers from the novel building block 3-amino-3-deoxy-heptakis(6-O-tert-butyldimethylsilyl)-β-cyclodextrin is reported. The cyclodextrins are linked with an amide bond on their secondary sides to an ethylene, octamethylene, or a metal binding bipyridyl group. Complexation studies with the substrate 6-(p-toluidino)-2-naphthalenesulfonic acid are presented and discussed
The synthesis of homo- and heterocyclodextrin (CD) dimers, containing two CD moieties that are linked through their secondary sides by aliphatic or 2,2'-bipyridyl spacers is described. In these dimers, the glucose units to which the spacers are linked have been transformed into altrose units. The dimers with an octamethylene spacer show self-complexation of the spacer in one of the CD moieties in aqueous solution, as revealed by H-1 and C-13 NMR spectroscopy. Using high-resolution (600 and 800 MHz) NMR spectroscopy and a variety of 2D NMR techniques, an assignment of nearly all of the H-1 NMR signals of two of the CD dimers was made, affording detailed information about the structure of these compounds in water. The self-inclusion of the spacers leads to lower binding affinities for ditopic guest molecules like p-toluidino-6-naphthalene sulfonate (TNS) derivatives and porphyrins. When a rigid 2,2'-bipyridyl group is used to connect the two CD moieties, self-inclusion of the spacer is not possible. This results in the formation of different complexes with ditopic guest molecules, for example, a 2:2 complex with a porphyrin.The CD heterodimers described in this paper contain an alpha-CD and a beta-CD moiety. These dimers display site-specific binding of guest molecules.