Direct Dehydrative Pyridylthio-Glycosidation of Unprotected Sugars in Aqueous Media Using 2-Chloro-1,3-dimethylimidazolinium Chloride as a Condensing Agent
enzyme inhibitors in sugar chemistry, have been synthesized directly from the corresponding unprotected sugars in good yields by using 2‐chloro‐1,3‐dimethylimidazolinium chloride (DMC) as dehydrativecondensingagent. The reaction proceeds in aqueous media without using any protecting groups, affording 2‐pyridyl 1‐thioglycosides with β‐configuration selectively. According to the present method, not
Aryl 1-thioglycosides have directly been synthesized in good yields from the corresponding unprotected sugars and thiols without protection of the hydroxy groups by using 2-chloro-1,3-dimethylimidazolinium chloride (DMC) as dehydrative condensing agent. The reaction proceeded in a mixed solvent of water and acetonitrile under mild reaction conditions, leading to the predominant formation of β-anomers.