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Beilstein J. Org. Chem. 2012, 8, 441–447, doi:10.3762/bjoc.8.50
Graphical Abstract
Scheme 1: 2,6-Dihydropyridine-3,5-dicarboxylates as useful organic dyads.
Scheme 2: Synthesis of dihydropyridine derivatives from enaminones.
Scheme 3: Dihydropyridine derivatives 4–7 and enaminone 8.
Figure 1: ORTEP of compounds 4b, 6d, 6f and 7a.
Figure 2: Absorption spectra of compounds 2j, 6a–f and 7a,b in acetonitrile (1 × 10−4 M).
Figure 3: Emission spectra of compounds 4a, 6a–f and 7a,b after excitation at their absorption λmax in the ra...
Figure 4: Emission spectra of compounds 2j, 4a, 6a–f and 7a,b after excitation at their absorption λmax in th...
Scheme 4: Synthesis of dihydropyridines from an enamino aldehyde, an enamino ester and an enaminonitrile.
Scheme 5: Nitric acid oxidation of dihydropyridines 2a–c and 6a.
Figure 5: ORTEP of compound 15d.