title: Introduction of vinyl and hydroxymethyl functionalities at C-4 of glucose-derived substrates: synthesis of spirocyclic, bicyclic, and tricyclic nucleosides.
abstract: Installing hydroxymethyl and hydroxyethyl substitutions at C-4 through vinylation and hydroboration-oxidation reactions of the C-4 bis-hydroxymethyl derivative of d-glucose based substrate, and inserting heteroatoms thereafter permitted formation of N-, O-, or S-heterocycles leading to [4,5]- or [5,5]-spirocycles and a bicyclo[3.3.0]octane product. Some of the spirocycles were converted to spironucleosides under Vorbruggen glycosidation reaction conditions. Similarly, the bicyclic product was elaborated to the corresponding bicyclic nucleoside as well as an unexpected tricyclic nucleoside.
authors.affiliation: Department of Chemistry, Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata, India.
authors.forename: Joy Krishna
authors.initials: JK
authors.lastname: Maity
authors.forename: Ramprasad
authors.initials: R
authors.lastname: Ghosh
authors.forename: Michael G B
authors.initials: MG
authors.lastname: Drew
authors.forename: Basudeb
authors.initials: B
authors.lastname: Achari
authors.forename: Sukhendu B
authors.initials: SB
authors.lastname: Mandal
mesh_terms: D003500:Cyclization; D005947:Glucose / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D009705:Nucleosides / Q000138:chemical synthesis* / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D009705:Nucleosides; D005947:Glucose