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- W2046576510 abstract "A novel series of exomethylene- and keto-exomethylene-d-glucopyranonucleosides with thymine, uracil, and 5-fluorouracil as heterocyclic bases have been designed and synthesized. Wittig condensation of the 3-keto glucoside 1 gave the corresponding 1,2:5,6-di-O-isopropylidene-3-deoxy-3-methylene-d-glucofuranose (2), which after hydrolysis and acetylation led to the precursor 1,2,4,6-tetra-O-acetyl-3-deoxy-3-methylene-d-glucopyranose (4). Compound 4 was condensed with silylated thymine, uracil, and 5-fluorouracil, respectively, deacetylated and acetalated to afford 1-(3′-deoxy-4′,6′-O-isopropylidene-3′-methylene-β-d-glucopyranosyl)pyrimidines 7a–c. Oxidation of the free hydroxyl group in the 2′-position of the sugar moiety led to the formation of the labile 1-(3′-deoxy-4′,6′-O-isopropylidene-3′-methylene-β-d-glucopyranosyl-2′-ulose)pyrimidines 8a–c. Finally, deisopropylidenation of the resulted derivatives 8a–c afforded the diol nucleosides 9a–c. The target keto-exomethylene analogs 9a–c were more cytostatic against a variety of tumor cell lines than the corresponding saturated-hydroxy-exomethylene derivatives 6. In particular, the 5-fluorouracil derivative 9c was highly cytostatic at an IC50 (50% inhibitory concentration) ranging between 0.56 and 9.4 μg/mL, which was comparable to the free parental 5-fluorouracil base." @default.
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- W2046576510 date "2011-02-01" @default.
- W2046576510 modified "2023-09-23" @default.
- W2046576510 title "Efficient synthesis of exomethylene- and keto-exomethylene-d-glucopyranosyl nucleoside analogs as potential cytotoxic agents" @default.
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- W2046576510 doi "https://doi.org/10.1016/j.carres.2010.10.019" @default.
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