scholarly journals The dark side of disulfide-based dynamic combinatorial chemistry

2020 ◽  
Vol 11 (31) ◽  
pp. 8151-8156
Author(s):  
Mélissa Dumartin ◽  
Jean Septavaux ◽  
Marion Donnier-Maréchal ◽  
Emeric Jeamet ◽  
Elise Dumont ◽  
...  
Keyword(s):  
Combinatorial Chemistry ◽  
Combinatorial Libraries ◽  
Dark Side ◽  
Dynamic Combinatorial Chemistry ◽  
Analytical Tools

We show that multiple analytical tools are necessary in order to describe the different phenomena within disulfide-based dynamic combinatorial libraries in terms of size, stereochemistry, affinity and selectivity.

scholarly journals Pyrroloindole-Based Dynamic Combinatorial Chemistry

Symmetry ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 726
Author(s):  
Tiberiu-Marius Gianga ◽  
Dora-Maria Răsădean ◽  
G. Dan Pantoș
Keyword(s):  
Ionic Strength ◽  
Combinatorial Chemistry ◽  
Building Block ◽  
Combinatorial Libraries ◽  
Building Blocks ◽  
Disulfide Exchange ◽  
Dynamic Combinatorial Chemistry ◽  
New Class ◽  
The Core

We report a new class of building blocks for Dynamic Combinatorial Chemistry (DCC) based on the pyrroloindole scaffold. The attachment of l-cysteine on the α, α′ positions of the core makes the molecule suitable for disulfide exchange in aqueous dynamic combinatorial libraries (DCLs). The synthesis of the core follows a modified version of the Knoevenagel–Hemetsberger approach. The new building block (l-PI) is fluorescent (Φ = 48%) and relatively stable towards thermal and photodegradation. The chirality of the cysteine is transferred to the electron-rich pyrroloindole core. Homo- and heterochiral DCLs of l-PI with electron-deficient l- and d-naphthalenediimide (NDI) lead to similar library distributions regardless of the enantiomer used. When no salt is present, the major component is a dimer, while dimers and tetramers are obtained at increased ionic strength.

Formation and Trapping of the Thermodynamically Unfavoured Inverted-Hemicucurbit[6]uril

2019 ◽  
Author(s):  
Elena Prigorchenko ◽  
Sandra Kaabel ◽  
Triin Narva ◽  
Anastassia Baškir ◽  
Maria Fomitšenko ◽  
...  
Keyword(s):  
Complex Formation ◽  
Combinatorial Chemistry ◽  
Trifluoroacetic Acid ◽  
Chloride Anion ◽  
Binding Affinities ◽  
Dynamic Covalent Chemistry ◽  
Reaction Selectivity ◽  
Low Concentration ◽  
Dynamic Combinatorial Chemistry ◽  
First Time

Amplification of a thermodynamically unfavoured macrocyclic product through the directed shift of the equilibrium between dynamic covalent chemistry library members is difficult to achieve. We show for the first time that during condensation of formaldehyde and <i>cis</i>-<i>N,N'</i>-cyclohexa-1,2-diylurea formation of <i>inverted-cis</i>-cyclohexanohemicucurbit[6]uril (<i>i-cis</i>-cycHC[6]) can be induced at the expense of thermodynamically favoured <i>cis</i>-cyclohexanohemicucurbit[6]uril (<i>cis</i>-cycHC[6]). The formation of <i>i-cis-</i>cycHC[6] is enhanced in low concentration of the templating chloride anion and suppressed in excess of this template. We found that reaction selectivity is governed by the solution-based template-aided dynamic combinatorial chemistry and continuous removal of the formed cycHC[6] macrocycles from the equilibrating solution by precipitation. Notably, the <i>i-cis</i>-cycHC[6] was isolated with 33% yield. Different binding affinities of three diastereomeric <i>i-cis</i>-, <i>cis</i>-cycHC[6] and their chiral isomer (<i>R,R</i>)-cycHC[6] for trifluoroacetic acid demonstrate the influence of macrocycle geometry on complex formation.

scholarly journals Adventures in molecular recognition. The ins and outs of templating

2000 ◽  
Vol 72 (12) ◽  
pp. 2265-2274 ◽  
Author(s):  
Jeremy K. M. Sanders
Keyword(s):  
Molecular Recognition ◽  
Combinatorial Chemistry ◽  
Biological Systems ◽  
Design Approach ◽  
Supramolecular Systems ◽  
Disulfide Exchange ◽  
Dynamic Combinatorial Chemistry ◽  
Evolutionary Features ◽  
Selection Approach ◽  
Porphyrin Dimers

Two different approaches are described for the creation of supramolecular systems potentially capable of recognition and catalysis. Using the design approach, we have been able to accelerate and influence two different Diels­Alder reactions within the cavities of porphyrin dimers and trimers; this is templating from the outside inwards. The selection approach is a synthetic chemical attempt to capture some of the key evolutionary features of biological systems: dynamic combinatorial chemistry is used to create equilibrating mixtures of potential receptors, and then a template is used to select and amplify the desired system. Five potential reactions for such dynamic chemistry are discussed: base-catalyzed transesterification, hydrazone exchange, disulfide exchange, alkene metathesis, and Pd-catalyzed allyl exchange, and preliminary templating results (inside outwards) are presented.

Structure-Based Design of Inhibitors of the Aspartic Protease Endothiapepsin by Exploiting Dynamic Combinatorial Chemistry

2014 ◽  
Vol 53 (12) ◽  
pp. 3259-3263 ◽  
Author(s):  
Milon Mondal ◽  
Nedyalka Radeva ◽  
Helene Köster ◽  
Ahyoung Park ◽  
Constantinos Potamitis ◽  
...  
Keyword(s):  
Combinatorial Chemistry ◽  
Aspartic Protease ◽  
Dynamic Combinatorial Chemistry

Dynamic combinatorial chemistry with diselenides and disulfides in water

2014 ◽  
Vol 50 (28) ◽  
pp. 3716-3718 ◽  
Author(s):  
Brian Rasmussen ◽  
Anne Sørensen ◽  
Henrik Gotfredsen ◽  
Michael Pittelkow
Keyword(s):  
Combinatorial Chemistry ◽  
Reversible Reaction ◽  
Dynamic Combinatorial Chemistry

Diselenide exchange is introduced as a reversible reaction in dynamic combinatorial chemistry in water at physiological pH.

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