25442-42-6Relevant articles and documents
A new reagent for the formation of anhydronucleosides
Bennua-Skalmowski,Vorbrueggen
, p. 739 - 742 (1996)
5'-O-Trityl-thymidine reacts with excess perfluorobutanesulfonyl fluoride/DBU in toluene to 5'-O-trityl-2,3'-anhydrothymidine in 75% yield. Free thymidine gives rise to 4',5'-dehydro-2,3'-anhydrothymidine and to 5'-fluoro-2,3'-anhydrothymidine.
Synthesis, structure, and biological evaluation of C-2 sulfonamido pyrimidine nucleosides
Krizmani?, Irena,Vi?njevac, Aleksandar,Lui?, Marija,Glava?-Obrovac, Ljubica,?ini?, Mladen,?ini?, Biserka
, p. 4047 - 4057 (2007/10/03)
The C-2 sulfonamido pyrimidine nucleosides were prepared by opening the 2,2′- or 2,3′-bond in anhydronucleosides under nucleophilic attack of sulfonamide anions. Reaction of the sodium salt of p-toluenesulfonamide or 2-(aminosulfonyl)-N,N-dimethylnicotinamide with 2,2′-anhydro-1-(β-D-arabinofuranosyl)cytosine gave the C-2 sulfonamido derivatives in excellent yields. Ring opening of the less reactive 2,2′-anhydrouridine and 2,3′-anhydrothymidine could be accomplished with DBU/CH3CN activation of p-toluenesulfonamide, giving moderate yields for C-2 sulfonamido derivatives. The action of acetic acid or ZnBr2/CH2Cl2 on 5-methyl-N2-tosyl-1-(2-deoxy-5-O-trityl-β-D-threo- pentofuranosyl)isocytosine led to the cleavage of both the protection group and the nucleoside bond, yielding 5-methyl-N2-tosylisocytosine as the major product. Structures of the prepared C-2 sulfonamido nucleosides were confirmed by the 1D and 2D NMR experiments, and X-ray structural analysis of 4-imino-N2-tosylamino-1-(β-D-arabinofuranosyl)pyrimidine. Both methods confirmed β-configuration and anti-conformation of the 2-sulfonamido nucleosides. The investigated compounds displayed moderate inhibition of tumor cell growth in vitro, as determined by the MTT assay using six different human tumor cell lines.
A facile one-pot synthesis of 2,3'-anhydro-2'-deoxyuridines via 3'-O-imidazolylsulfonates
No,Dong Seong Shin,Bok Ju Song,Ahn,Ha
, p. 3873 - 3882 (2007/10/03)
Continued interests in the novel synthetic methods of the pivotal compound, 2,3'-anhydro-2'-deoxyribonucleosides (7) uncovered a facile one-pot conversion of 5 with 1,1'-sulfonyldiimidazole in basic conditions to 7 with almost quantitative yields (91-99%).