21740-23-8Relevant articles and documents
PROCESSES FOR PRODUCING DECITABINE
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Page/Page column 4-5, (2010/10/19)
New processes for producing decitabine are provided.
Synthesis of 1-(2-deoxy-β-D-ribofuranosyl)-2,4-difluoro-5- substituted-benzene thymidine mimics, some related α-anomers, and their evaluation as antiviral and anticancer agents
Wang,Duan,Wiebe,Balzarini,De Clercq,Knaus
, p. 11 - 40 (2007/10/03)
A group of unnatural 1-(2-deoxy-β-D-ribofuranosyl)-2.4-difluorobenzenes having a variety of C-5 substituents (H, Me, F, Cl, Br, I, CF3, CN, NO2, NH2), designed as thymidine mimics, were synthesized for evaluation as anticancer and antiviral agents. The coupling reaction of 3,5-bis-O-(p-chlorobenzoyl) 2-deoxy-α-D-ribofuranosyl chloride with an organocadmium reagent [(2,4-difluorophenyl)2Cd] afforded a mixture of the α- and β-anomeric products (α:β = 3:1 to 10:1 ratio). Treatment of the α-anomer with BF3·Et2O in nitroethane at 110-120°C for 30 min was developed as an efficient method for epimerization of the major α-anomer to the desired β-anomer. The 5-substituted (H, Me, Cl, I, NH2) β-anomers exhibited negligible cytotoxicity in a MTT assay (CC50 = 10-3-10-4 M range), relative to thymidine (CC50 = 10-3-10-5 M range), against a variety of cancer cell lines. In contrast, the 5-NO2 derivative was more cytotoxic (CC50 = 10-5-10-6 M range). A number of 5-substituted β-anomers, and some related α-anomers, that were evaluated using a wide variety of antiviral assay systems [HSV-1, HSV-2, varicella-zoster virus (VZV), vaccinia virus, vesicular stomatitis, cytomegalovirus (CMV) and human immunodeficiency (HIV-1, HIV-2) viruses], showed that this class of unnatural C-aryl nucleoside mimics are inactive antiviral agents.
Synthesis and hybridization studies of oligonucleotide sequences with modified fluorescent nucleoside analogs
Pandey, Rajendra K.,Tripathi, Snehlata,Misra, Krishna
, p. 1937 - 1948 (2007/10/03)
Two complementary oligodeoxynucleotide hexamers CATGAA and TTCATG and a pentamer with a fluorescent nucleoside analog viz. 9-N-(2'-deoxy-β-D- ribofuranosyl) carbazole (C*) incorporated into it, TTC*ATG were synthesized and characterised by spectroscopic and chromatographic studies. The comparative fluorescent studies of the two nucleoside analogs viz. 9-N- (2'-deoxy-β-D-ribofuranosyl) acridone and its carbazole analog (C*) have been carried out under different experimental conditions. The effect on fluorescence by incorporation of (C*) into the sequence and its subsequent hybridization with the complementary sequence have been studied.
Process for Producing 1-(2'-deoxy-beta-D-erythropentofuranosyl)-5-trifluoromethyluracil Derivatives
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, (2008/06/13)
A process for producing 1-(2'-deoxy-β-D-erythro-pentofuranosyl)-5-trifluoromethyluracil derivative of the formula (3) by which the desired compound can be produced easily at a low cost with high selectivity is disclosed. The process according to the present invention comprises (a) reacting 5-trifluoromethyl-5,6-dihydrouracil with alkylsulfoxide in the presence of a halogen and an acid catalyst to obtain 5-trifluoromethyluracil; (b) reacting the obtained 5-trifluoromethyluracil with a silylating agent to obtain 5-trifluoromethyl-2,4-bis(trimethylsilyloxy)pyrimidine of the formula (1) and (c) reacting the obtained 5-trifluoromethyl-2,4-bis(trimethylsilyloxy)pyrimidine with 2-deoxy-α-D-erythro-pentofuranosyl halide derivative of the formula (2) in chloroform solvent in the presence of fluoride ion and in the presence of a copper compound as a catalyst.