Acid-base and spectral properties of 3 (benzothiazolyl-2)cumarins and their imino analogs
Abstract
Systematic series of 3-(benzothiazolyl-2)coumarin derivatives and their imino analogs were synthesized. Spectral-luminescent properties in acetonitrile solutions, acid-base equilibria in water-alcohol media, reaction of imino-group hydrolysis were investigated for the title compounds. Tautomerism of 7-hydroxy-2-iminochromens in water-alcohol solutions and possibility of practical application of 7-methoxycumarin as fluorescence quantum yield reference compound are discussed as well.
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