Investigation of The Kinetics of Degradation of Hexopyranosylated Cytosine Nucleosides Using Liquid Chromatography
作者:Grace N. Thoithi、Ann Van Schepdael、Roger Busson、Gerard Janssen、Arthur Van Aerschot、Piet Herdewijn、EugÈNe Roets、Jos Hoogmartens
DOI:10.1080/15257770008033003
日期:2000.1
Abstract Liquid chromatography was used to follow the degradation of hexopyranosylated cytosine nucleosides in buffers of acid, neutral and alkaline pH and of constant ionic strength. The compounds were found to degrade by hydrolysis to cytosine and/or by deamination to the corresponding uracil nucleosides. Degradation in acid is influenced by the number of sugar hydroxyl groups, presence of sugar double
Nucleosides and nucleotides. LXII. Synthesis and optical properties of 2,3-dideoxy-D-erythro-hex-2-enopyranosyl nucleosides.
作者:TOHRU UEDA、SHINICHI WATANABE
DOI:10.1248/cpb.33.3689
日期:——
Condensation of 3, 4, 6-tri-O-acetyl-D-glucal and trimethylsilylated nucleobases in the presence of stannic chloride or trimethylsilyl trifluoromethanesulfonate gave anomeric mixtures of 2, 3-dideoxy-D-erythro-hex-2-enopyranosyl nucleosides. The signs of the circular dichroism (CD) spectra of the anomeric 2-hexenopyranosyl nucleosides are opposite to those of usual nucleosides or glucopyranosyl nucleosides. Other examples illustrating the contribution of an unsaturated bond in the sugar portion of nucleosides to the CD spectra are also presented.