ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 19, Number 6
JKCSEZ 19(6)
December 20, 1975 

The syntheses of anomeric mixtures of 1-(4-thio-α,β-D-ribofuranosyl)-5-fluoro-and 5-chlorouracils from their corresponding bis(trimethylsilyl) derivatives of 5-halogenouracils and 2,3,5-tri-O-acetyl-4-thio-α,β-D-ribofuranosyl chloride are described. Preliminary biochemical studies showed that in leukemia 1210 cells and Streptococcus faecium, the β-anomeric 5-chloro-4'-thionucleoside is not greatly different from the corresponding 4'-oxygen analog. However, the 5-fluoro-4'-thionucleoside showed a growth inhibitory effect more than that of the oxygen counterpart. The potential chemotherapeutic use of the analog is to warrant further study.