期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 75, 期 9, 页码 2798-2805出版社
AMER CHEMICAL SOC
DOI: 10.1021/jo902485m
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A new template of C-4'-truncated phosphonated nucleosides (TPCOANs) has been obtained in good yields according to two different routes which exploit the reactivity of a phosphonated nitrone. The one-step procedure based on the 1,3-dipolar cycloaddition of a phosphonated nitrone with vinyl nucleobases leads to the unnatural alpha-nucleosides as the main adducts. On the other hand, the target beta-anomers have been obtained in high yield by a two-step procedure based on the 1,3-dipolar cycloaddition of a phosphonated nitrone with vinyl acetate followed by nucleosidation reaction. The reactivity of the phosphonated nitrone has been investigated trough quantum mechanical DFT calculations at the B3LYP/D95+(d,p) theory level. Preliminary biological assays show that beta-anomers of TPCOANs are able to inhibit the reverse trancriptase of different retroviruses at concentrations in the nanomolar range, with a potency comparable with that of tenofovir.
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