6 article(s) from Sandjo, Louis P.
Graphical Abstract
Figure 1: Structure of fusaricidins E (1) and F (2).
Figure 2: NOESY /COSY and HMBC correlations of compound 1.
Figure 3: Fragmentation pattern of compounds 1 and 2.
Scheme 1: Retrosynthetic plan for the depsipeptide and GHPD side chain.
Scheme 2: a) LiAlH4, THF, reflux, 12 h, quant.; b) Fmoc-OSu, NaHCO3, 1,4-dioxane, H2O, 0 °C to rt, 87%; c) 1:...
Scheme 3: Ester bond formation with 2,2-dimethylated pseudoproline including peptide 16.
Scheme 4: Cyclization with 2,2-dimethylated pseudoproline including peptide 16.
Scheme 5: Depsipeptide cyclization and coupling with GHPD side chain.
Figure 4: Byproducts from removal of Cbz group in THF and DMF.
Graphical Abstract
Figure 1: UPLC profile of the butanol fraction of the leaves of Jungia sellowii after shaking the flask with ...
Figure 2: Structures of compounds 1–3.
Figure 3: COSY and HMBC correlations of compounds 1–3.
Figure 4: NOESY correlations of compounds 1–3.
Figure 5: ECD spectra of compounds 1–3.
Graphical Abstract
Figure 1: Fragments produced by the FAB–MS of dehydrokuanoniamine B (20) [42].
Figure 2: Fragments produced by the EIMS of sagitol (26) [55].
Figure 3: Fragments produced by the EIMS of styelsamine B (4) [45].
Figure 4: Fragments produced by the EIMS of styelsamine D (6) [45].
Figure 5: Fragments produced by the EIMS of subarine (37) [40].
Scheme 1: Synthesis of styelsamine B (4) and cystodytin J (1) [58].
Scheme 2: Synthesis of sebastianine A (38) and its regioisomer 39 [59].
Scheme 3: Synthesis route A of neoamphimedine (12) [61].
Scheme 4: Synthesis route B of neoamphimedine (12) [62].
Scheme 5: Synthesis of arnoamines A (40) and B (41) [63].
Scheme 6: Synthesis of ascididemin (42) [65].
Scheme 7: Synthesis of subarine (37) [66,67].
Scheme 8: Synthesis of demethyldeoxyamphimedine (9) [68].
Scheme 9: Synthesis of pyridoacridine analogues related to ascididemin (42) [70].
Scheme 10: Synthesis of analogues of meridine (56) [71].
Scheme 11: Synthesis of bulky pyridoacridine as eilatin (58) [72].
Scheme 12: Synthesis of AK37 (59), analogue of kuanoniamine A (60) [73].
Figure 6: Biosynthesis pathway I [74].
Figure 7: Reaction illustrating catechol and kynuramine as possible biosynthetic precursors [75].
Figure 8: Biosynthesis pathway B deduced from the feeding experiment A using labelled precursors [76].
Figure 9: Proposed biosynthesis pathway [47].
Figure 10: 4H-Pyrido[2,3,4-kl]acridin-4-one as a cytotoxic pharmacophore.
Figure 11: 7H-Pyrido[2,3,4-kl]acridine as a cytotoxic pharmacophore.
Figure 12: 9H-Quinolino[4,3,2-de][1,10]phenanthrolin-9-one as a cytotoxic pharmacophore.
Figure 13: 8H-Benzo[b]pyrido[4,3,2-de][1,7]phenanthrolin-8-one as a cytotoxic pharmacophore.
Figure 14: Pyrido[4,3,2-mn]pyrrolo[3,2,1-de]acridine as a cytotoxic pharmacophore.
Figure 15: 9H-Pyrido[4,3,2-mn]thiazolo[4,5-b]acridin-9-one and 8H-pyrido[4,3,2-mn]thiazolo[4,5-b]acridine: cyt...
Figure 16: 9H-quinolino[4,3,2-de][1,10]phenanthrolin-9-one as an anti-mycobacterial pharmacophore.
Figure 17: 9H-Quinolino[4,3,2-de][1,10]phenanthrolin-9-one as an antibacterial pharmacophore.
Figure 18: Saturated and less saturated pyridine moieties as aspartyl inhibitor cores.
Figure 19: Iminobenzoquinone and acridone cores as intercalating and TOPO inhibitor motifs found in pyridoacri...
Graphical Abstract
Figure 1: HMBC, COSY and NOESY correlations of compound 1.
Figure 2: HMBC, COSY and NOESY correlations of compound 2.
Figure 3: HMBC, COSY and NOESY correlations of compound 3.
Figure 4: HMBC, COSY and NOESY correlations of compound 4.
Figure 5: Structures of the isolated compounds.
Figure 6: Crystal structures (ORTEP plot) of arohynapene A (5, left) and tanzawaic acid E (8, right). Thermal...
Graphical Abstract
Figure 1: Structure of SF002-96-1.
Figure 2: COSY (bold) and HMBC (arrow) correlations of SF002-96-1.
Figure 3: NOESY correlations of SF002-96-1.
Figure 4: Effect of SF002-96-1 on survivin promoter activity, survivin mRNA levels and expression. (A) Colo 3...
Figure 5: Effect of SF002-96-1 on Sat3 and NF-κB binding to the survivin promoter in Colo 320 cells analyzed ...
Figure 6: SF002-96-1 induces apoptosis of Colo 320 cells. (A) Colo 320 cells were treated without (control) o...
Figure 7: Single-quadrupole mass spectrumof SF002-96-1 obtained using an atmospheric pressure chemical ioniza...
Graphical Abstract
Figure 1: Known compound sesamin (1) isolated from methylene extract of stem bark of Z. paracanthum.
Figure 2: COSY, HMBC and NOE correlations of compounds 2, 3 and 4.