119555-47-4Relevant articles and documents
4-Azido-2-pyrimidinone Nucleosides and Related Chemistry
Kotra, Lakshmi P.,Wang, Pingping,Bartlett, Michael G.,Shanmuganathan, Kirupa,Xu, Zusheng,Cavalcanti, Socrates,Gary Newton,Chu, Chung K.
, p. 7267 - 7271 (2007/10/03)
As a part of azide prodrug approach, we synthesized a 4-azido analog of ara-C (4) as a prodrug for ara-C. The compound 4 was obtained from 1-(β-D-arabinofuranosyl)uracil (1) in three steps. At pH 7.0 and 11.0, a loss of UV absorption of the compound 4 was observed resulting from a transformation that was proved by identifying the transformed product 5 by 1-D, and 2-D NMR as well as tandem mass spectral studies. In NMR studies, changes in the chemical shifts were observed at positions 5, 6, 1′, and 2′ between the compounds 4 and 5. A molecular peak at m/z 270.1 (MH+) was observed in the mass spectra of compounds 4 and the transformed product 5. A fragment at 180.2 was identified to be the compound 6, containing the 6,2′-anhydro linkage of compound 5. The X-ray analysis indicated that compound 4 exists as l-(β-D-arabinofuranosyl)tetrazolo[4,5-c]pyrimidin-2-one, with the azide moiety cyclized. To understand if the chemical instability of the nucleoside 4 was due to the arabino configuration of 2′-OH or due to the azido moiety, we also studied 1-(2,3-dideoxy-2-fluoro-β-D-arabinofuranosyl)tetrazolo[4,5-c]p3Timidin-2- one (11) and 4-azido-1-methyl-2-pyrimidinone (15). At pH 2.0 and 7.0, similar UV profiles were observed for compounds 11 and 15. However, at pH 11.0, λmax shifted slowly to lower wavelength for both compounds 11 and 15. In a separate kinetic study, they were stable at pH 7.4 for up to 2.45 h. From the NMR and high-resolution mass spectral studies, it was concluded that in the presence of ammonium hydroxide, an addition of amine occurred at 6-position of compound 11. Thus, the stability profiles of compounds 4, 11, and 15 were different. The instability and the formation of 2′,6-anhydro bond in compound 4 in nonacidic media was due to the presence of 2′-OH in the arabino configuration and probably not due to the azide group.
2'-fluorofuranosyl derivatives and novel method of preparing 2'-fluoropyrimidine and 2'-fluoropurine nucleosides
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, (2008/06/13)
A compound has the formula STR1 wherein R is selected from the group consisting of (C7 -C20)aroyl, (C6 -C20)aryl, aralkyl and alkylaryl, and (C1 -C10)alkyl-di(C6 -C20)aryl Si, R' is selected from the group consisting of (C1 -C10)alkyl, (C7 -C20)aroyl and (C2 -C12)acyl, all of which may be further substituted with O, S, N or alkyl, and R'" is selected from the group consisting of halogen, (C1 -C10)alkoxy, (C1 -C10)acyloxy, O-methane-sulfonyl and O-p-toluenesulfonyl. A composition of matter comprises 0.001 to 99.999 wt % of the above compound.
Chemistry and anti-HIV properties of 2'-fluoro-2',3'- dideoxyarabinofuranosylpyrimidines
Siddiqui,Driscoll,Marquez,Roth,Shirasaka,Mitsuya,Barchi Jr.,Kelley
, p. 2195 - 2201 (2007/10/02)
The synthesis, chemistry, biochemistry, and anti-HIV activity of a series of 1-(2,3-dideoxy-2-fluoro-β-D-threo-pentofuranosyl)pyrimidines have been studied in an attempt to find useful anti-AIDS drugs. Synthesis is carried out via a 2,3-dideoxyribose intermediate which facilitates the preparation of analogues by removing the sugar 3'-hydroxyl group prior to, rather than after, condensation with a uracil or cytosine aglycon. The 2'-F-dd-uridine analogues 7a-d (with H, F, Cl, and CH3 substitution in the 5-position) as well as the 4-deoxy compound (12b) are nonprotective to ATH8 or CEM cells infected with HIV-1. In the corresponding cytidine series, the 5-chloro analogue (11) is inactive. However, 2'-fluoro-2',3'- dideoxyarabinosylcytosine, 10a, and its 5-fluoro analogue, 10b, are both active. While neither compound is as potent as ddC or 5-F-ddC (2b), 10b gives complete protection against the cytopathic effects of HIV in both host cell lines. 2'-Fluoro substitution confers increased chemical and enzymatic stability on dideoxynucleosides. Even though dideoxy pyrimidine nucleosides are inherently more stable than the corresponding purine analogues toward acid-catalyzed cleavage of the glycosidic bond, 2'-fluoro substitution (10a) still increases stabilization relative to ddC (2b). No detectable deamination by partially purified cytidine deaminase is observed with the 2'-fluoro compounds 10a, 10b, or 11 under conditions which rapidly deaminate cytidine. A small amount of 2'-F-dd-ara-U (7a) is formed from 10a in monkey plasma after >24 h of exposure. The octanol-water partition coefficients for the dideoxynucleosides in this study indicate their hydrophilic character, with log P values varying from -0.28 to -1.18.
A more expedient approach to the synthesis of anti-HIV-active 2,3-dideoxy-2-fluoro-β-D-threo-pentofuranosyl nucleosides
Wysocki Jr.,Siddiqui,Barchi Jr.,Driscoll,Marquez
, p. 1005 - 1008 (2007/10/02)
Starting with 1,3,5-tri-O-benzoyl-2-deoxy-2-fluoro-α-D-arabinofuranose, a versatile method for the synthesis of 2,3-dideoxy-2-fluoro-β-D-threo-pentofuranosyl nucleosides is described and illustrated with the synthesis of 9-(2,3-dideoxy-2-fluoro-β-D-threop
Synthesis and anti-HIV activity of several 2'-fluoro-containing pyrimidine nucleosides
Sterzycki,Ghazzouli,Brankovan,Martin,Mansuri
, p. 2150 - 2157 (2007/10/02)
Several 2'-fluoroarabino-2',3'-dideoxy- and 2'-fluoro-2',3'-unsaturated 2',3'-dideoxy pyrimidine nucleoside analogues are reported. The saturated analogues 1-(2,3-dideoxy-2-fluoro-β-D-threo-pentofuranosyl)thymine (2'-threo-FddT, 33), 1-(2,3-dideoxy-2-fluoro-β-D-threo-pentofuranosyl)uracil (2'-threo-FddU, 22) were readily prepared from the corresponding 2'-deoxy-2'-fluoroarabinosyl nucleoside analogue by radical deoxygenation of the 3'-OH. The unsaturated compounds 1-(2,3-dideoxy-2-fluoro-β-D-glycero-pent-2-enofuranosyl)thymine (2'-Fd4T, 40) and 1-[5-O-(monomethoxytrityl)-2-fluoro-2,3-dideoxy-β-D-glycero -pent-2-enofuranosyl]uracil (39) were synthesized by an elimination reaction of the O-2,3'-anhydro-2'-fluoro-lyxo derivatives under basic conditions. The cytidine analogues 28 and 41 were prepared by amination of the corresponding uridine derivatives; compounds 28 and 41 were deprotected to give 1-(2,3-dideoxy-2-fluoro-β-D-arabinofuranosyl)cytidine (2'-threo-FddC, 29) and 1-(2,3-dideoxy-2-fluoro-β-D-glycero-pent-2-enofuranosyl)cytosine (2'-Fd4C, 42), respectively. All of these novel compounds were evaluated in vitro against human immunodeficiency virus (HIV) (LAV isolate). 2'-threo-FddC (29) was the most active of the newly synthesized substances against HIV with an ID50 of 0.8 μg/mL; ddC had an ID50 of 0.007 μg/mL. Because of its potency in the initial tests, 29 was further evaluated in both T cells and macrophage/monocyte cell lines, with several different isolates of HIV. Although 2'-threo-FddC (29) exhibited good antiviral activity in these systems, it was less active than AZT in these assays. At 1 μM the inhibition of CFU-GM by 29 was found to be 35-40%; this is slightly higher than seen with AZT.
Synthesis and anti-HIV-1 activity of 2'-'up'-fluoro analogues of active anti-AIDS nucleosides 3'-azido-3'-deoxythymidine (AZT) and 2',3'-dideoxycytidine (DDC)
Watanabe,Harada,Zeidler,Matulic-Adamic,Takahashi,Ren,Cheng,Fox,Chou,Zhu,Polsky,Gold,Armstrong
, p. 2145 - 2150 (2007/10/02)
1-(3-Azido-2,3-dideoxy-2-fluoro-β-D-arabinofuranosyl)thymine (6, F-AZT) and 1-(2,3-dideoxy-2-fluoro-β-D-threopentofuranosyl)cytosine (12, F-DDC) were synthesized from the potent antiherpes virus nucleosides 1-(2-deoxy-2-fluoro-β-D-arabinofuranosyl)thymine
Synthesis and antiviral activity of monofluoro and difluoro analogues of pyrimidine deoxyribonucleosides against human immunodeficiency virus (HIV-1)
Martin,Bushnell,Duncan,Dunsdon,Hall,Machin,Merrett,Parkes,Roberts,Thomas,Galpin,Kinchington
, p. 2137 - 2145 (2007/10/02)
A range of 2'-fluoro and 2',3'-difluoro analogues of pyrimidine deoxyribonucleosides have been synthesized and evaluaed against human immunodeficiency virus (HIV-1) in a human lymphoblastoid cell line. Among these compounds, 1-(2,3-dideoxy-2-fluoro-β-D-threopentofuranosyl)cytosine (12), 2',3'-didehydro-2',3'-dideoxy-2'-fluorocytidine (35), 1-(2,3-dideoxy-2,3-difluoro-β-D-arabinofuranosyl)cytosine (41), and 3'-deoxy-2',3'-didehydro-2'-fluorothymidine (45) were found to have significant antiviral activity, with IC50 values of 0.65, 10, 10, and 100 μM, respectively. The structure-activity relationships are discussed.
3'-Fluoro-2',3'-dideoxy-5-chlorouridine: most selective anti-HIV-1 agent among a series of new 2'- and 3'-fluorinated 2',3'-dideoxynucleoside analogues.
Van Aerschot,Herdewijn,Balzarini,Pauwels,De Clercq
, p. 1743 - 1749 (2007/10/02)
A series of 2'- and 3'-fluorinated 2',3'-dideoxynucleosides and 3'-azido-2',3'-dideoxynucleosides were synthesized and evaluated for their inhibitory activity against human immunodeficiency virus-1 (HIV-1) replication in MT-4 cells. Neither conversion of
