WebOct 13, 2014 · The stereochemical outcome of glycosylation reactions of 2-deoxy-sugar trichloroacetimidates promoted by chiral Brønsted acids is shown to be dependent on both the chirality of the catalyst... WebJul 19, 2024 · Abstract. Herein, we reported on a highly efficient glycosylation reaction comprising two chronological meticulously designed catalytic cycles: (1) rhodium-catalyzed formation of sulfonium ylide and (2) Brønsted acid-catalyzed formation of sulfonium ion. This protocol highlighted an effective and robust tactic to prepare a glycosyl sulfonium ...
Chiral Brønsted acid mediated glycosylation with recognition of …
WebJan 19, 2024 · With the introduction of chiral BINOL-derived N-triflyl phosphoramides in 2006, asym. Bronsted acid catalysis is no longer restricted to reactive substrates. Also certain carbonyl compds. can be activated through these stronger Bronsted acid catalysts. In dealing with sensitive substrate classes, chiral dicarboxylic acids proved of particular ... WebFeb 26, 2016 · A new member of the recently developed class of chiral confined Brønsted acids finally enables this elusive transformation with excellent selectivity and scope, and illustrates the general difficulty of dealing with oxocarbenium ion intermediates in BrøNsted acid catalysis. 108 Chiral Brønsted acids for asymmetric organocatalysis. birthday vs anniversary
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WebApr 2, 2010 · The use of a chiral Brønsted acid catalyst for the activation of trichloroacetimidate glycosyl donors has been demonstrated for the first time. In toluene … WebJan 1, 2013 · Glycosylation mediated – Brønsted Acic Ionic Liquid in aqueous solution Carbohydrate Research Authors: Sébastien Delacroix SYNDIVIA SAS No full-text available Montmorillonite K-10 as a Reusable... WebNov 1, 2008 · Chiral Bronsted Acid: Innovations and Application to Regiodivergent Glycosylations Thesis Jan 2024 Tay Rosenthal View Show abstract Organocatalytic Enantioselective Friedel‐Crafts Alkylation... birthday vs born day