title: Efficient synthesis of methyl 3,5-di-O-benzyl-alpha-D-ribofuranoside and application to the synthesis of 2'-C-beta-alkoxymethyluridines.
abstract: Methyl 3,5-di-O-arylmethyl-alpha-D-ribofuranosides have been used extensively as synthons to construct 2'-C-branched ribonucleosides. Herein, we describe efficient access to methyl 3,5-di-O-arylmethyl-alpha-D-ribofuranosides (aryl: 2-ClC(6)H(4), 3-ClC(6)H(4), 4-ClC(6)H(4), 4-BrC(6)H(4), 2,4-Cl(2)C(6)H(3), Ph) in 72-82% yields from methyl D-ribofuranoside. We also demonstrate efficient access to the versatile precursor methyl 3,5-di-O-benzyl-alpha-D-ribofuranoside (3f) and the synthesis of 2'-C-beta-methoxymethyl- and 2'-C-beta-ethoxymethyluridine in six steps from 3f with overall yields of 18% and 32%, respectively.
authors.affiliation: Howard Hughes Medical Institute, Department of Biochemistry and Molecular Biology, University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, USA. nli@uchicago.edu
authors.forename: Nan-Sheng
authors.initials: NS
authors.lastname: Li
authors.forename: Jun
authors.initials: J
authors.lastname: Lu
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Piccirilli
mesh_terms: D006031:Glycosylation; D008697:Methane / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D012266:Ribose / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry; D013237:Stereoisomerism; D014529:Uridine / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D012266:Ribose; D008697:Methane; D014529:Uridine