6742-07-0Relevant articles and documents
BIOREDUCTIVELY-ACTIVATED PRODRUGS
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Page/Page column 25, (2010/10/20)
The present invention relates to a compound of formula (1), or a pharmaceutically acceptable salt thereof, Formula: (1); wherein: R1 is a substituted aryl or heteroaryl group bearing at least one nitro or azido group or is an optionally substituted benzoquinone, optionally substituted naphthoquinone or optionally substituted fused heterocycloquinone; R2 is H, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted cycloalkyl, optionally substituted heterocycloalkyl, aryl or heteroaryl; and R3 is selected such that R3NH2 represents a cytotoxic nucleoside analogue or an ester or phosphate ester prodrug of a cytotoxic nucleoside analogue, with the proviso that if R1 is an aryl group then R2 is not H.
Transformations of thiopyrimidine and thiopurine nucleosides following oxidation with dimethyldioxirane
Saladino, Raffaele,Mincione, Enrico,Crestini, Claudia,Mezzetti, Maurizio
, p. 6759 - 6780 (2007/10/03)
A general and convenient method for the synthesis of several pyrimidine and purine nucleosides by selective oxidation of thionucleosides with dimethyldioxirane is reported. Thioketo moieties in the C-4 position of the pyrimidine ring, and in the C-6, and C-8 positions of the purine ring are the domain of oxidative nucleophilic substitution. Thioketo moieties in the C-2 position of both purine and pyrimidine rings are the domain of desulfurization or formation of disulfides.
Acetylenic nucleosides. 4. 1-β-D-arabinofuranosyl-5-ethynylcytosine. Improved synthesis and evaluation of biochemical and antiviral properties
Bobek,Kavai,Sharma,Grill,Dutschman,Cheng
, p. 2154 - 2157 (2007/10/02)
5-Ethynyl-1-β-D-arabinofuranosylcytosine (EAC) was prepared from 1-(2,3,5-tri-O-acetyl-β-D-arabinofuranosyl)cytosine by iodination followed by coupling with (trimethylsilyl)acetylene and deblocking. At 50 μM, EAC was found to inhibit the in vitro replication of herpes simplex virus type 1 and type 2 by >99%. EAC also showed activity against a strain of HSV-1 resistant to (E)-5-(2-bromovinyl)-2'-deoxyuridine which has an alteration of the virus-induced thymidine kinase (TK).. At 100 μM, EAC did not inhibit the in vitro growth of leukemia L1210 and HeLa cells. EAC was resistant to the action of dCR-CR deaminase, its rate of deamination being approximately 2% that of dCR. The compound was a poor substitute for dCR kinase, but it was phosphorylated by HSV-1- and HSV-2-induced TKs at 50% and 30%, respectively, the rate of thymidine.
4-(1,2,4-Triazol-1-yl)- and 4-(3-Nitro-1,2,4-triazol-1-yl)-1-(β-D-2,3,5-tri-O-acetylarabinofuranosyl)pyrimidin-2(1H)-ones. Valuable Intermediates in the Synthesis of Derivatives of 1-(β-D-Arabinofuranosyl)cytosine (Ara-C)
Divakar, K.J.,Reese, Colin B.
, p. 1171 - 1176 (2007/10/02)
Treatment of the acetylated derivative (3b), which was prepared from uridine in 86 percent overall yield, with tri(1H-1,2,4-triazol-1-yl)phosphine oxide gave compound (6a) in high yield, and with 3-nitro-1,2,4-triazole and diphenyl phosphorochloridate it gave compound (6b) in high yield.When the former product (6a) was allowed to react with ammonia, methylamine, dimethylamine, and morpholine at room temperature, and the products further deacetylated if necessary, ara-C (1; R1=R2=H) and its corresponding 4-N-alkyl derivatives (1; R1=H, R2=Me), (1: R1=R2=Me), and 1,R2= -(CH2)2O(CH2)2-> were obtained in very high yields. 4-N-Phenyl-ara-C (1; R1=H, R2=Ph) was obtained in high yield when compound (6a) or (6b) was heated with aniline in pyridine solution and the products then deacetylated.The nitro-compound (6b) was converted into the ara-C derivative (1; R1=H, R2=CH2CO2Me), and the sulphide (7) was obtained following the deacetylation of the products of the reaction between the 1,2,4-triazolyl derivative (6a), toluene-p-thiol, and triethylamine.