Bc. Pan et al., SYNTHESIS OF 5-HALOGENO-6-AMINO-2'-DEOXYURIDINES AND THEIR ANALOGS ASPOTENTIAL INHIBITORS OF THYMIDINE PHOSPHORYLASE, Nucleosides & nucleotides, 17(12), 1998, pp. 2367-2382
5-Halogeno-6-amino-2'-deoxyuridines were synthesized from 2'-deoxyurid
ine as potential thymidine phosphorylase (ThdPase) inhibitors. Among t
he compounds synthesized, 5-bromo-6-amino-2'-deoxyuridine (6) and 5-io
do-6-amino-2'-deoxyuridine (9) were found to inhibit ThdPase activity
with IC50 values of 1.3 mu M and 6.5 mu M, respectively. In vitro cell
culture studies showed that compound (6) can significantly enhance th
e cytotoxic effects of 5-fluoro-2'-deoxyuridine against a human colon
cancer HCT-8 cell line.