title: The Wittig-cyclization procedure: acid promoted intramolecular formation of 3-C-branched-chain 3,6-anhydro furano sugars via 2'-oxopropylene derivatives.
abstract: Some olefinic Wittig products, 3-deoxy-5,6-O-isopropylidene-3-C-(2'-oxopropylene)-1,2-O-alkylidene hexofuranose derivatives were converted to the branched-chain 3,6-anhydro-3-C-(2'-oxopropyl) derivatives on treatment with ion exchange resin Amberlite 120 (H(+)) in methanol-water at room temperature. Hydrolysis of 5,6-isopropylidene groups and intramolecular ring-closures took place in one pot reactions.
authors.affiliation: Celal Bayar University, Faculty of Art and Sciences, Chemistry Department, Manisa 45040, Turkey.
authors.forename: Kadir
authors.initials: K
authors.lastname: Ay
authors.forename: Fatma
authors.initials: F
authors.lastname: Cetin
authors.forename: Levent
authors.initials: L
authors.lastname: Yüceer
mesh_terms: D000475:Alkenes; D000812:Anhydrides; D005663:Furans / Q000737:chemistry*; D005947:Glucose / Q000737:chemistry; D006601:Hexoses / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation
chemical_list: D000475:Alkenes; D000812:Anhydrides; D005663:Furans; D006601:Hexoses; C057406:gulose; C013658:propylene; D005947:Glucose