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Beilstein J. Org. Chem. 2019, 15, 1032–1045, doi:10.3762/bjoc.15.101
Graphical Abstract
Figure 1: 2-Aminoimidazole alkaloids from marine sponges.
Figure 2: The Knoevenagel–Michael adduct [24] and expected products.
Scheme 1: The three component condensation of imidazo[1,2-a]pyridine, aldehydes and Meldrum’s acid described ...
Figure 3: Molecular structure of 1-([1,1'-biphenyl]-4-yl)-5-oxo-7-phenyl-6,7-dihydro-5H-pyrrolo[1,2-c]imidazo...
Scheme 2: Two forms of cation 9i.
Figure 4: Molecular structure of 3-(2-amino-4-phenyl-1H-imidazol-5-yl)-3-(p-tolyl)propanoic acid 11b accordin...
Scheme 3: Three forms of the compound 11b in the crystal phase.
Scheme 4: Synthesis of the mixture of compounds 13 and 14.
Figure 5: Molecular structure of aminoimidazo[1,2-c]pyrrole 16a according to X-ray diffraction data. Thermal ...
Scheme 5: Resonance structures of 16a.
Figure 6: 3,3’-Spirooxindole alkaloids.
Figure 7: Molecular structure of aminoimidazo[1,2-c]pyrrole 19a according to X-ray diffraction data. Thermal ...
Scheme 6: Resonance structures of 19a.
Beilstein J. Org. Chem. 2014, 10, 117–126, doi:10.3762/bjoc.10.8
Figure 1: The NOE correlations of the signals in 1H NMR spectra of compounds 4b–4d.
Figure 2: Molecular structure of spirooxindole 4a according to X-ray diffraction data.
Figure 3: The NOE correlations of the signals in 1H NMR spectrum of compound 6c.
Figure 4: Molecular structure of spirooxindole 6a observed in crystal phase as solvate with methanol accordin...
Scheme 1: The mechanism of the regioselective synthesis of compounds 4 and 6.
Figure 5: Conformations of acrylamide and benzoylacrylic acid.
Figure 6: The Fukui function indices of acrylamide, azomethine ylide and benzoylacrylic acid.
Scheme 2: The synthesis of compounds 7a–7c.
Figure 7: The selected COSY, NOESY and HMBC correlations of the signals in the 1H and 13C NMR spectra of comp...
Scheme 3: Tentative reaction mechanism for the decarboxylative cyclative rearrangement of the initial three-c...