作者:Hiroshi Tanaka、Yuji Nishiura、Takashi Takahashi
DOI:10.1021/ja0613613
日期:2006.6.1
elegant synthesis of α(2,8)-oligosialosides is described. The 5-N,4-O-carbonyl-protected sialyl donor undergoes α-sialylation in CH2Cl2 to give α(2,8)- and α(2,9)-disialosides in excellent yields. The 5-N,4-O-carbonyl protecting group was effective in improving the reactivity of the C8 hydroxyl groups toward glycosylation. Using the sialyl building block, the synthesis of tetra-α(2,8)-sialic acid was accomplished
描述了 α(2,8)-oligosialosides 的有效和优雅的合成。5-N,4-O-羰基保护的唾液酸供体在 CH2Cl2 中进行 α-唾液酸化,以优异的产率得到 α(2,8)- 和 α(2,9)-二唾液酸苷。5-N,4-O-羰基保护基团可有效提高 C8 羟基对糖基化的反应性。使用唾液酸构建块,四-α(2,8)-唾液酸的合成是通过使用简单的糖苷化和脱保护方案完成的。