6 article(s) from Giannis, Athanassios
Graphical Abstract
Figure 1: Structures of the natural (+)-artemisinin (1) and the synthesized (+)-3-hydroxymethylartemisinin (2...
Scheme 1: Synthesis of the Diels–Alder precursor 8 over four steps in 71% yield, starting from aldehyde 3 and...
Scheme 2: Synthesis of (+)-3-hydroxymethyl-9-desmethylartemisinin (16), starting from Diels–Alder derivatives ...
Scheme 3: Synthesis of (+)-3-hydroxymethyl-9-epi-artemisinin (18) and (+)-3-hydroxymethylartemisinin (2). Rea...
Graphical Abstract
Figure 1: Mortality of V. destructor (number of mites) after 12 h treatment with 20, 60, or 100 μL dose of ac...
Figure 2: Time dependence of the mortality (%) of V. destructor after a 60 μL dose. The number in parenthesis...
Figure 3: Field test results on application of extract B, bayvarol and oxalic acid to bee populations.
Figure 4: Structures of costic acid, 7-O-methylaromadendrin and 7-O-methylaromadendrin-3-acetate.
Graphical Abstract
Scheme 1: Synthesis of hexasaccharide 10. Conditions: a) TfOH, NIS, 4 Å molecular sieves, DCM, 0 °C to rt; b)...
Graphical Abstract
Figure 1: Structures of cyclopamine (1) and carbacyclopamine analog 2.
Scheme 1: Retrosynthetic analysis of carbacyclopamine analog 2.
Scheme 2: Synthesis of carbacyclopamine analog 2.
Graphical Abstract
Scheme 1: Proposed steps for DNA demethylation (for details see text).
Figure 1: Structures of the synthesized compounds.
Scheme 2: Synthesis of the 2'-deoxycytidine analogues.
Scheme 3: Reactions of TCBoc-protected aldehydes 4 and 5 with organometallic reagents.
Scheme 4: Proposed mechanism for the formation of 3,6-dihydrodeoxycytidine derivatives 8a–d (M = Li, Mg).
Graphical Abstract
Figure 1: Structures of cyclopamine and exo-cyclopamine.
Scheme 1: Synthesis of 25-epi-exo-cyclopamine 5, bis-exo-cyclopamine 6, and derivatives 8 and 9. Reaction con...
Scheme 2: Synthesis of 20-demethyl-bis-exo-cyclopamine 19 and F-nor-20,25-bis-demethyl-exo-cyclopamine 23. Re...
Figure 2: IC50 values of Shh inhibition by compounds 5, 6 and 23 in a Gli1-reporter gene assay. Data were obt...