A. Katritzky, Abdelmotaal Abdelmajeid, S. R. Tala
2011
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11
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Journal
Synthesis
Abstract
α-Aminoxy acid conjugates and hybrid α-aminoxy dipeptide conjugates showing blue to green fluorescence (with quantum yields 0.23―0.71) were synthesized (75―92% yield) from N-acylbenzotriazoles. 7-Methoxycoumarin derivatives were obtained (quantum yields ϕ 0.35―0.71) that could be suitable for peptide assays. The wavelengths of the absorption maxima (λ Abs ) and the fluorescence emission maxima (λ Em ) and the quantum yields (ϕ) of some coumarin-3-ylcarbonyl aminoxy acid conjugates were comparable to those of the analogous amino acid derivatives.