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Beilstein J. Org. Chem. 2022, 18, 580–587, doi:10.3762/bjoc.18.60
Graphical Abstract
Scheme 1: Syntheses of pyrido[1,2-a]pyrrolo[3,4-d]pyrimidine 3a and N-methyl-4-((5-bromopyridin-2-yl)amino)-s...
Figure 1: Presumed reaction mechanism to produce 3a.
Figure 2: Fluorescence spectral profiles of (a) 4a (10−5 M, Exmax = 413 nm) and (b) 4e (10−5 M, Exmax = 415 n...
Figure 3: Fluorescence spectral changes of (a) 4a (10−5 M, Exmax = 413 nm) and (b) 4e (10−5 M, Exmax = 415 nm...
Figure 4: Protonation of N-methyl-4-((pyridin-2-yl)amino)-substituted maleimides 4 by 0.1 M HCl.
Figure 5: Frontier molecular orbitals and HOMO–LUMO energy gaps of compounds 3a, 4a, and 4e for ground-state ...
Beilstein J. Org. Chem. 2012, 8, 266–274, doi:10.3762/bjoc.8.28
Scheme 1: Syntheses of benzo[4,5]thieno[3,2-d]pyrimidine 5,5-dioxides (3a–f).
Scheme 2: Syntheses of 3g, 6, and 7.
Figure 1: (a) HOMO and (b) LUMO for 3a, computed with TD-DFT(B3LYP)/6-31+G(d,p). The pink (blue) lobes indica...
Figure 2: The distribution of the HOMO minus LUMO density for 3a, computed with TD-DFT(B3LYP)/6-31+G(d,p). Th...
Figure 3: Schematic diagram of 3a.