Synthesis of 4,6-dideoxy-3-fluoro-2-keto-beta-D-glucopyranosyl analogues of 5-fluorouracil, N6-benzoyl adenine, uracil, thymine, N4-benzoyl cytosine and evaluation of their antitumor activities.

Abstract:

:The synthesis of the unsaturated 4,6-dideoxy-3-fluoro-2-keto-beta-d-glucopyranosyl nucleosides of 5-fluorouracil (6a), N(6)-benzoyl adenine (6b), uracil (6c), thymine (6d) and N(4)-benzoyl cytosine (6e), is described. Monoiodination of compounds 1a,b, followed by acetylation, catalytic hydrogenation and finally regioselective 2'-O-deacylation afforded the partially acetylated dideoxynucleoside analogues of 5-fluorouracil (5a) and N(6)-benzoyl adenine (5b), respectively. Direct oxidation of the free hydroxyl group at the 2'-position of 5a,b, with simultaneous elimination reaction of the beta-acetoxyl group, afforded the desired unsaturated 4,6-dideoxy-3-fluoro-2-keto-beta-D-glucopyranosyl derivatives 6a,b. Compounds 1c-e were used as starting materials for the synthesis of the dideoxy unsaturated carbonyl nucleosides of uracil (6c), thymine (6d) and N(4)-benzoyl cytosine (6e). Similarly a protection-selective deprotection sequence followed by oxidation of the free hydroxyl group at the 2'-position of the dideoxy benzoylated analogues 9c-e with simultaneous elimination reaction of the beta-benzoyl group, gave the desired nucleosides 6c-e. None of the compounds was inhibitory to a broad spectrum of DNA and RNA viruses at subtoxic concentrations. The 5-fluorouracil derivative 6a was more cytostatic (50% inhibitory concentration ranging between 0.2 and 12 microM) than the other compounds.

journal_name

Bioorg Chem

journal_title

Bioorganic chemistry

authors

Manta S,Tsoukala E,Tzioumaki N,Kiritsis C,Balzarini J,Komiotis D

doi

10.1016/j.bioorg.2009.11.001

subject

Has Abstract

pub_date

2010-04-01 00:00:00

pages

48-55

issue

2

eissn

0045-2068

issn

1090-2120

pii

S0045-2068(09)00091-1

journal_volume

38

pub_type

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