Dynamic combinatorial chemistry with hydrazones: libraries incorporating heterocyclic and steroidal motifs
作者:Mark G. Simpson、Michael Pittelkow、Stephen P. Watson、Jeremy K. M. Sanders
DOI:10.1039/b917146k
日期:——
We expand the possibilities in hydrazone based dynamic combinatorial chemistry with a series of new building blocks incorporating heterocyclic motifs. The synthetic procedure allows efficient access to building blocks with the general structure (MeO)2CH-Heterocycle-C(O)NHNH2, originating from heterocycles with an amine and an ester functionality. The equilibrium distribution of macrocyclic N-acyl hydrazones formed upon deprotection of the building blocks with TFA in organic solvents is reported. The mixing behaviour of these heterocycle-based building blocks with our cholate-based building blocks is described, particularly the observation of kinetic intermediates that disappear following ‘proof-reading’.
[Problem to be Solved] To provide a fluorescent probe for ALDH3A1 detection that can be used in flow cytometry adaptable to live cells.
[Means of Resolution] A compound represented by general formula (I) or a salt thereof, wherein the compound or salt thereof has a retention time on an HPLC chromatogram measured under the following conditions of longer than 6.9 minutes when said compound is in aldehyde form and of 6.9 minutes or less when said compound is in carboxylic acid form.
Degradable Hybrid Materials Based on Cationic Acylhydrazone Dynamic Covalent Polymers Promote DNA Complexation through Multivalent Interactions
作者:Camille Bouillon、Delphine Paolantoni、Jennifer C. Rote、Yannick Bessin、Larryn W. Peterson、Pascal Dumy、Sébastien Ulrich
DOI:10.1002/chem.201403695
日期:2014.11.3
are capable of effectively complexing dsDNA in aqueous buffer and biological serum at N/P ratios comparable to polyethyleneimine polymers. The self‐assembly of dynamic covalent polymers through the incorporation of a reversible covalent bond within their main chain is therefore a promising strategy for generating degradable materials that are capable of establishing multivalent interactions and effectively
New and Efficient Arrays for Photoinduced Charge Separation Based on Perylene Bisimide and Corroles
作者:Lucia Flamigni、Barbara Ventura、Mariusz Tasior、Thomas Becherer、Heinz Langhals、Daniel T. Gryko
DOI:10.1002/chem.200700866
日期:2008.1
Excitation of the perylenebisimide unit is followed by competing reactions of: 1) energy transfer to the corrole unit, which subsequently deactivates to the charge-separated state and; 2) electron transfer to directly form the charge-separated state. The ratio of electron-to-energy-transfer rates is 9:1 and 1:1 for C3-PI and C3-PPI, respectively. The yield of chargeseparation is essentially 100