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Beilstein J. Org. Chem. 2020, 16, 2795–2806, doi:10.3762/bjoc.16.230
Graphical Abstract
Scheme 1: The structures and numbering of berberine (1a) and the alkyl-substituted derivatives 1an–en and the...
Scheme 2: Synthesis of the berberine–adenine conjugates 4a–e.
Figure 1: Representative spectrophotometric (A) and spectrofluorimetric (B) titration of compound 4c with 22AG...
Figure 2: Melting temperatures, ΔTm, of G4-DNA (cDNA = 0.2 µM) F21T (black), F21T plus ds26 (15 equiv, red), ...
Figure 3: CD spectra of 22AG (A) and a2 (B) in the presence of the ligands 4c (in K+-phosphate buffer (pH 7.0...
Figure 4: The simplified structure of the complex between 1e3 and quadruplex DNA (left; [38]) and the proposed or...
Beilstein J. Org. Chem. 2019, 15, 2822–2829, doi:10.3762/bjoc.15.275
Scheme 1: Synthesis of hemi-indigo derivatives Z-1a–c.
Scheme 2: Synthetic routes to alkylamino-substituted dimethoxy hemi-indigo Z-1c.
Figure 1: Photoswitching of hemi-indigo derivatives: (A) Z-1a, c = 20 μM in H2O with 10% (v/v) DMSO, λex = 42...
Scheme 3: Photoswitching of hemi-indigo derivatives.
Figure 2: Absorption spectra of the Z-isomer (black), two photostationary states obtained upon irradiation wi...
Beilstein J. Org. Chem. 2017, 13, 203–212, doi:10.3762/bjoc.13.23
Figure 1: Structures of quinolizinium derivatives 1a–c and 2.
Scheme 1: Synthesis of 3-hydroxynaphtho[1,2-b]quinolizinium bromide (2).
Figure 2: Absorption (A, c = 100 µM) and normalized emission spectra (B, c = 10 µM or Abs. = 0.1 at λex) of d...
Figure 3: Photometric (A) and fluorimetric (B) acid–base titration (λex = 380 nm) of naphthoquinolizinium 2 (c...
Figure 4: Absorption spectra of 2 (c = 100 µM) in MeOH (A) and MeCN (B). Black lines: without additive, red: ...
Figure 5: Normalized emission spectra of 2 (c = 10 µM) in MeOH (A, λex = 400 nm) and MeCN (B, λex = 398 nm). ...
Figure 6: Photometric titration of CB[7] (c = 0.45 mM) to 2 (c = 15 µM) in BPE buffer (with 10% v/v DMSO) at ...
Figure 7: Photometric (A) and fluorimetric (B) acid–base titration (λex = 380 nm) of 2 (c = 15 µM) in the pre...
Scheme 2: Acid–base equilibrium of hydroxynaphthoquinolizinium 2.
Figure 8: Structures of quinolizinium derivatives 6–8.