Synthesis of coumarin derivatives containing 2-aminothiazole moiety and their recognition of metal ions

Two new coumarin derivatives bearing 2-aminothiazole moiety were synthesized and the molecular structures were confirmed by NMR and HRMS. In acetonitrile, C1 exhibited a selective fluorescence enhancement effect to Mg2+ among the metal ions examined. C2 showed a selective fluorescence quenching effect to Co2+.