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
摘要在酸性,中性和碱性pH值和恒定离子强度的缓冲液中,采用
液相色谱法跟踪六
吡喃糖基化
胞嘧啶核苷的降解情况。发现该化合物通过
水解成
胞嘧啶和/或通过脱
氨基成相应的尿
嘧啶核苷而降解。酸的降解受糖羟基数量,糖双键的存在和端基异构体类型的影响。将某些化合物的稳定性与相关胸腺
嘧啶核苷的稳定性进行了比较。温度研究支持在pH 1.22下
水解的单分子机理。