219932-13-5Relevant articles and documents
Simple and mild stereoselective O-glycosidation using 1,2-anhydrosugars under neutral conditions
Somasundaram, Devaraj,Balasubramanain, Kalpattu K.,Shanmugasundaram, Bhagavathy
supporting information, p. 764 - 767 (2019/02/16)
The ring opening of α-D-1,2-anhydrohexapyranoses with phenols proceeded smoothly in ethyl acetate (neutral conditions) in the absence of metal ion catalysts or additives to stereoselectively furnish 1,2-cis-α-aryl glycosides as the major product and 1,2-t
β-glycosidation of sterically hindered alcohols
Szpilman, Alex M.,Carreira, Erick M.
supporting information; experimental part, p. 1305 - 1307 (2009/08/07)
The 2-chloro-2-methylpropanoic ester serves as a steering group in the Schmidt glycosidation reaction. Rapid and efficient glycosidation of a range of sterically hindered alcohols takes place under mild, acidic conditions to afford the glycoside products
Experimental evidence on the hydroxymethyl group conformation in alkyl β-D-mannopyranosides
Mayato, Carlos,Dorta, Rosa,Vazquez, Jesus
, p. 2385 - 2397 (2007/10/03)
A rotational population study of the hydroxymethyl group of alkyl β-D-mannopyranosides was performed by means of CD and NMR spectroscopy. Three different benzyl, acetyl, and p-bromobenzoyl series of alkyl β-D-mannopyranosides with different chiral and non
C2-hydroxyglycosylation with glycal donors. Probing the mechanism of sulfonium-mediated oxygen transfer to glycal enol ethers
Honda, Eiji,Gin, David Y.
, p. 7343 - 7352 (2007/10/03)
The C2-hydroxyglycosylation reaction employing the reagent combination of a diaryl sulfoxide and triflic anhydride offers a novel method for glycal assembly whereby a hydroxyl functionality is stereoselectively installed at the C2-position of a glycal donor with concomitant glycosylation of a nucleophilic acceptor. Mechanistic investigations into this reaction revealed a novel process for sulfonium-mediated oxidation of glycal enol ethers in which the sulfoxide oxygen atom is stereoselectively transferred to the C2-position of the glycal. 18O-labeling studies revealed that the S-to-C2 oxygen-transfer process involves initial formation of a C1-O linkage followed by O-migration to C2, leading to the generation of an intermediate glycosyl 1,2-anhydropyranoside that serves as an in situ glycosylating agent. These findings are consistent with the initial formation of a C2-sulfonium-C1-oxosulfonium pyranosyl species upon activation of the glycal donor with Aryl2SO·Tf2O.