Synthesis and fluorescence properties of environment-sensitive 7-(diethylamino)coumarin derivatives
摘要:
By linking 7-(diethylamino)coumarin and different aromatic groups via an oxazole moiety, a small series of new environment-sensitive fluorophores have been synthesized. They display varying degrees of environment-sensitivity, depending on the aromatic group present on the oxazole ring. Additionally, these coumarin-based fluorophores show considerably better photostability compared to the nitrobenzoxadiazole fluorophore, and offer a good starting point for the further development of these fluorophores into environment-sensitive membrane probes or for other applications requiring sensitivity to the environment. (C) 2014 Elsevier Ltd. All rights reserved.
Fluorescent Labeling Reagents. Part 3. Screening Search for Organic Fluorophores: Syntheses and Fluorescence Properties of 3-Azolyl-7-diethylaminocoumarin Derivatives.
been assessed for the synthesis of two coumarin fluorophores containing azides, 1a and 2, for subsequent “click” modification. In the case of 1a reported methods were successfully applied, but the resulting azide proved to be rather unstable and appears more suited to in-situ generation and conversion to the “click” triazole. In the case of 2, reported methods for the synthesis of precursor 5 were ineffective