Beilstein J. Org. Chem.2017,13, 564–570, doi:10.3762/bjoc.13.55
arylation of aminocholanes has been described for the first time. While this Cu-catalyzed protocol provides high yields in reactions of aminocholanes with iodoarenes, Pd catalysis was found to be preferable for the reactions of aminocholanes with dichloroanthraquinones. UV–vis titration of bis(cholanylamino
)anthraquinones with a series of cations demonstrated their high binding affinity to Cu2+, Al3+, and Cr3+.
Keywords: amination; aminocholanes; bile acids; cation complexation; Cu-catalysis; diaminoanthraquinone; Pd-catalysis; Introduction
Bile acids are known to ensure vital processes in vertebrate organisms
saturated with hydroxy groups was inconvenient for the syntheses of bis(polyoxamino) derivatives by Pd-catalyzed amination [34][35].
Direct metal-catalyzed arylation of aminocholanes has not yet been employed in the synthesis of cholane-based ligands. Here, we report a new and efficient synthesis of
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Graphical Abstract
Figure 1:
A tripodal molecular pocket (a) [12] or jellyfish resembling receptors (b) [11,16].