Journal
ORGANIC LETTERS
Volume 9, Issue 16, Pages 3009-3012Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol071075b
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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-ClC6H4, 3-ClC6H4, 4-ClC6H4, 4-BrC6H4, 2,4-Cl2C6H3, 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.
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