A facile formation of 2,5-anhydro sugars by ring contraction in methyl hexopyranoside 2-triflates under conditions of nucleophilic displacement

Article abstract of DOI:10.1016/0008-6215(89)80056-4

Reaction of methyl 3,4-O-isopropylidene-2-O-(trifluoromethylsulfonyl)-α-L-fucopyranoside and its β anomer with a variety of nucleophilic reagents under mild conditions led to displacement of the triflic ester group, with migration of the ring-oxygen atom