17231-20-8Relevant academic research and scientific papers
Oxidation of stannylene derivatives of carbohydrates using 1,3-dibromo-5,5-dimethylhydantoin
Soederman, Peter,Widmalm, Goeran
, p. 184 - 186 (1999)
1,3-Dibromo-5,5-dimethylhydantoin (DBDMH) has been used to oxidize stannylene derivatives of monosaccharides to give hydroxy-ketones thereof. Oxidations could be performed rapidly and in good-to-excellent yields. The oxidizing reagent DBDMH thus provides
N-Thiocarbonyl iminosugars: Synthesis and evaluation of castanospermine analogues bearing oxazole-2(3H)-thione moieties
Silva, Sandrina,Sanchez-Fernandez, Elena M.,Ortiz Mellet, Carmen,Tatibouet, Arnaud,Pilar Rauter, Amelia,Rollin, Patrick
, p. 7941 - 7951 (2014/01/06)
A straightforward and efficient synthetic route to a new class of glycosidase inhibitors containing an oxazole-2(3H)-thione moiety has been devised. The approach involves the formation of α-hydroxy ketones, which, after condensation with thiocyanic acid, leads to the formation of the heterocycle. By exploiting the ability of the nitrogen atom of oxazoline-2-thione precursors to act as nucleophiles in intramolecular addition, castanospermine analogues could be readily prepared in good overall yields. Glycosidase inhibitory activity compared to oxazolidinethione analogues showed a strong influence of the double bond, for example with pseudoiminosugar 19, by suppressing α-glucosidase inhibition and introducing, to a moderate level, β-glucosidase inhibitory activity. Reactivities showed the propensity of oxazole-2(3H)-thiones - especially when fused on carbohydrate frames - to convert into 1,3-oxazolidine-2-thione aminals through nucleophilic addition to the double bond, leading to unexpected tricyclic structure 21. Oxazole-2(3H)-thione moieties have been anchored onto carbohydrates in a five-step sequence that allows access to castanospermine analogues. Copyright
Synthesis of pseudo-C-nucleosides from β-formyl-α,β- unsaturated ester bearing a β-furanosidic moiety
Pinheiro, Jorge M.,Isabel Ismael,Figueiredo, J. Albertino,Silva, Artur M. S.
experimental part, p. 1237 - 1244 (2011/09/30)
Pseudo-C-nucleosides have potential biological activity, and an efficient synthesis of new pseudo-C-nucleosides has been developed via the reaction of a β-formyl-α,β-unsaturated ester bearing a β-sugar moiety with hydrazines in neutral and acidic conditio
Synthesis and biological evaluation of sugars containing α,β-unsaturated γ-lactones
Xavier, Nuno M.,Silva, Sandrina,Madeira, Paulo J. A.,Helena Florencio,Silva, Filipa V. M.,Justino, Jorge,Thiem, Joachim,Rauter, Amelia P.
experimental part, p. 6134 - 6143 (2009/05/31)
The stereocontrolled synthesis of new sugar derivatives carrying the α,β-unsaturated δ-lactone (butenolide) moiety is described. Sugar-fused or sugar-linked butenolides can be constructed by an efficient reaction sequence involving Wittig olefination of 3- or 5-keto sugars and intramolecular cyclization of the intermediate γ-hydroxy α,β-unsaturated esters. The antimicrobial activities of the products and that of a known sugar-derived pyranoid α,β-unsaturated δ-lactone were investigated against six pathogenic bacteria and six fungi. The pyranoid α,β-unsaturated δ-lactone 29 proved to be the most active compound in this series towards the plant pathogenic fungi Colletotrichum coffeanum (coffee berry disease) and Pyricularia oryzae (rice blast disease). Wiley-VCH Verlag GmbH & Co. KGaA, 2008.
