Beilstein J. Org. Chem.2012,8, 486–495, doi:10.3762/bjoc.8.55
orange–yellow in color. Azobenzene coupled DAN and DeUG modules were successfully used as colorimetric indicators for specific DAN–DeUG and DAN–UPy (2-ureido-4(1H)-pyrimidone) quadruply hydrogen-bonding interactions.
Keywords: azobenzene dye; colorimetric indicators; 7-deazaguanineurea (DeUG); 2,7
-diamido-1,8-naphthyridine (DAN) unit was linked to azobenzene dyes through one of its amide groups, giving compounds 5, 8, and 10, and the 7-deazaguanineurea (DeUG) unit was linked to an azobenzene dye by a Steglich esterification, giving 12, or by the copper-catalyzed azide–alkyne cycloaddition (click
Yagang Zhang Steven C. Zimmerman Department of Chemistry, 600 South Mathews Avenue, University of Illinois, Urbana, IL 61801, USA 10.3762/bjoc.8.55 Abstract The facile coupling of azobenzene dyes to the quadruply hydrogen-bonding modules 2,7-diamido-1,8-naphthyridine (DAN) and 7-deazaguanineurea
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Graphical Abstract
Figure 1:
Chemical structures of UPy dimer and DAN complexes with UG and DeUG.