18 research outputs found
Synthesis of C-Linked immobized analogs of aloisine A by click chemistry
International audienceAn efficient approach for the immobilization of a series of analogs of aloisine A, an in vitro inhibitor of protein kinases, to polymeric supports via a [3+2] cycloaddition reaction is reported
Synthesis of C-Linked immobized analogs of aloisine A by click chemistry
International audienceAn efficient approach for the immobilization of a series of analogs of aloisine A, an in vitro inhibitor of protein kinases, to polymeric supports via a [3+2] cycloaddition reaction is reported
Modified Julia Olefination on anhydrides : extension and limitations. Application to the synthesis of maculalactone B
International audienceThe preparation of exo-enol esters from cyclic anhydrides is reported using a modified Julia olefination. The reaction is highly stereoselective. The Smiles rearrangement can be performed in a one-pot process, giving a straightforward access to exo-enol lactones. Furthermore, the reaction was extended to semistabilized sulfones, and this methodology was applied to the synthesis of maculalactone B
Development of a modified Julia olefination of imides for the synthesis of alkaloids
International audienceWe report the development of the intramolecular Julia olefination of imides. This original reaction produces N-fused bicyclic enamide compounds, which are interesting precursors in the synthesis of alkaloids. We show that this transformation enables access to [5,6], [6,5], and [6,6] fused bicyclic lactam enamides. The scope and the limitations of the reaction are presented as well as computational studies concerning novel mechanistic aspects of the title reaction
Glucosinolate chemistry : synthesis of O-glycosylated derivatives of glucosinalbin
International audienceThe synthesis of the major glucosinolate of Moringa oleifera and of other non-natural O-glycosylated derivatives of glucosinalbin is reported. The synthetic sequence applied, which involves the conversion of carbohydrate-based nitrostyrenes into the key thiohydroximates, appears to be sufficiently versatile to synthesize a range of glucosinolatesbearing a glycosylated phenolic function. We synthesizedanalogues of the naturally occurring L-rhamnoside 1 with a view to estimating the importance of this phenol-protecting sugar moiety in modulating the biological activity of the parent glucosinolate and related breakdown products
A convenient and versatile synthesis of Laurdan-like fluorescent membrane probes: characterization of their fluorescence properties
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Synthesis of new derivatives of 11-thiolupinine
International audienceA set of 11-thiofunctionalized derivatives of natural (â)-lupinine have been synthesized using phosphine-based redox type methods such as Hata and Mitsunobu reactions
Synthesis of new derivatives of 11-thiolupinine
International audienceA set of 11-thiofunctionalized derivatives of natural (â)-lupinine have been synthesized using phosphine-based redox type methods such as Hata and Mitsunobu reactions
Synthesis of exoâEnamides from Protected Lactams Using a Modified Julia Olefination Reaction: Application to the Synthesis of Spiroaminal Fragments
International audienceA modified Julia olefination (JuliaâKocienski) reaction involving lactams has been developed, which gives the corresponding substituted exo-enamides in moderate to good yields. An application of this versatile transformation in the synthesis of spiroaminal fragments is also demonstrated