116514-50-2Relevant articles and documents
Pillar[5]arene-Based Polycationic Glyco[2]rotaxanes Designed as Pseudomonas aeruginosa Antibiofilm Agents
Coenye, Tom,De Winter, Julien,Diaconu, Andrei,Fransolet, Maude,Gillon, Emilie,Imberty, Anne,Jimmidi, Ravikumar,Michiels, Carine,Mohy El Dine, Tharwat,Vincent, Stéphane P.
supporting information, p. 14728 - 14744 (2021/10/12)
Pseudomonas aeruginosa (P.A.) is a human pathogen belonging to the top priorities for the discovery of new therapeutic solutions. Its propensity to generate biofilms strongly complicates the treatments required to cure P.A. infections. Herein, we describe the synthesis of a series of novel rotaxanes composed of a central galactosylated pillar[5]arene, a tetrafucosylated dendron, and a tetraguanidinium subunit. Besides the high affinity of the final glycorotaxanes for the two P.A. lectins LecA and LecB, potent inhibition levels of biofilm growth were evidenced, showing that their three subunits work synergistically. An antibiofilm assay using a double δlecAδlecB mutant compared to the wild type demonstrated that the antibiofilm activity of the best glycorotaxane is lectin-mediated. Such antibiofilm potency had rarely been reached in the literature. Importantly, none of the final rotaxanes was bactericidal, showing that their antibiofilm activity does not depend on bacteria killing, which is a rare feature for antibiofilm agents.
Total synthesis of LewisX using a late-stage crystalline intermediate
Munneke, Stefan,Painter, Gavin F.,Gainsford, Graeme J.,Stocker, Bridget L.,Timmer, Mattie S.M.
, p. 1 - 7 (2015/07/15)
Abstract Herein, we report on a highly efficient synthesis of a crystalline protected LewisX trisaccharide that was converted to LewisX following global deprotection. The trisaccharide was prepared in a highly convergent synthesis (seven steps, longest linear sequence) and in a 38% overall yield using a strategy that involved the regioselective glycosylation of a GlcNAc acceptor with a galactose thioglycoside donor, followed by fucosylation of the remaining free GlcNAc hydroxyl as key steps. The core trisaccharide also has the potential to be converted to other members of the Type-2 Lewis family of antigens due to the orthogonal nature of the protecting groups employed.
Synthesis of L-altrose and some derivatives
Lunau, Nathalie,Meier, Chris
, p. 6260 - 6270 (2013/01/15)
A convenient approach to the chemical synthesis of L-altrose (1) and its 6-deoxy derivative 2 has been developed by starting from D-galactose (9) and D-fucose (10), respectively. The 5-epimerization by a Mitsunobu inversion of the open-chain D-hexoses was the key step for these routes. Furthermore, the conversion of 2 into peracetylated TDP-6-deoxy-α-L-altrose (3a) was achieved by the cycloSal approach. However, the final deacetylation led to an unexpected side-reaction resulting in the previously unknown 6-deoxy-α-L-altropyranose 1,3-cyclophosphate (4).
