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- W2887419164 abstract "Hypoxanthine-guanine-xanthine phosphoribosyltransferase (HGXPRT) is a key enzyme of the purine salvage pathway and its activity is crucial for the survival of certain parasites e.g. Plasmodium falciparum (Pf). Acyclic nucleoside phosphonates (ANPs) containing either guanine or hypoxanthine as the purine base are inhibitors of this enzyme. In this part of a SAR study, these two naturally-occurring nucleobases attached to an acyclic moiety were replaced by allopurinol or favipiravir. Both allopurinol and favipiravir ANPs were prepared via Mitsunobu reaction. The alkylation of favipiravir was optimized to yield both N- and O- regioisomers but the N-regioisomers were unstable under deprotection conditions. Thus, only the ANPs containing the O-isomer of favipiravir and those containing allopurinol were evaluated as potential inhibitors of human HGPRT and PfHGXPRT. Two ANPs with allopurinol as the base have Ki values of 10 μM and 30 μM for PfHGXPRT but do not inhibit human HGPRT activity at concentrations of 100–150 μM." @default.
- W2887419164 created "2018-08-22" @default.
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- W2887419164 date "2018-10-01" @default.
- W2887419164 modified "2023-10-02" @default.
- W2887419164 title "Acyclic nucleoside phosphonates with unnatural nucleobases, favipiravir and allopurinol, designed as potential inhibitors of the human and Plasmodium falciparum 6-oxopurine phosphoribosyltransferases" @default.
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- W2887419164 doi "https://doi.org/10.1016/j.tet.2018.08.014" @default.
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