Epimerization at C2 of Methyl 5-O-Benzyl-2-deoxy-2-fluoro-α-D-pentofuranosides upon Oxidation
作者:Igor Mikhailopulo、Grigorii Sivets、Nicolai Poopeiko、Natalia Khripach
DOI:10.1080/15257779508012388
日期:1995.5.1
Oxidation of 1 with DMSO-acetic anhydride resulted in the formation of a mixture of epimeric ketones 2 and 3 in the ratio of approximate to 3:1 in high combined yield. Acetolysis of methyl glycoside 5 afforded 1-O-acetyl-3,5-di-O-benzoyl-2-deoxy-2-fluoro-beta-D-ribofuranoside (6)(83%). The latter was reacted with silylated N-6-benzoyladenine to give alpha- and beta-ribosides (1:3.7; 61%, combined).