Beilstein J. Org. Chem.2017,13, 2690–2697, doi:10.3762/bjoc.13.267
the reaction medium. The results suggest that 1 could be used as fluorophore in OFF–ON-type fluorogenic probes.
Keywords: dipeptidyl peptidase-4; fluorogenic substrate; fluorometry; smallfluorescentmolecule; Introduction
Fluorescent organic probes have become indispensable for bio-imaging or
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Graphical Abstract
Figure 1:
(a) UV–vis absorption and (b) fluorescence spectra of 1–4 in THF.