Preparation, Properties, and Applications of <i>n</i>-Pentenyl Arabinofuranosyl Donors
作者:Jun Lu、Bert Fraser-Reid
DOI:10.1021/ol0490680
日期:2004.9.1
development of n-pentenyl furanosyl donors has been tested using arabinose as a model. The readily prepared ortho ester (NPOE) is converted into disarmed (NPG(AC)) and thence armed (NPG(ALK)) n-pentenyl arabinofuranosides. The reactivities of these furanosyl donors and pyranosyl counterparts have been assessed by allowing pairs of both to compete for an acceptor. For the NPOE and armed (NPG(ALK)) pairs
[反应:见正文]已使用阿拉伯糖作为模型测试了正戊烯基呋喃糖基供体的发育。易于制备的原酸酯(NPOE)被转化为脱甲(NPG(ACK)),然后被武装(NPG(ALK))正戊烯基阿拉伯呋喃糖苷。这些呋喃糖基供体和吡喃糖基对应物的反应性已经通过允许两者成对竞争竞争受体来评估。对于NPOE和武装(NPG(ALK))对,从供体中获得偶联产物,而对于解除武装(NPG(AC))对,仅获得阿拉伯呋喃诺偶联产物。为了探究其合成用途,已证明NPOE是制备结核分枝杆菌复杂lipoarabinomannan细胞壁阵列的α-1,5-连接的阿拉伯聚糖片段所需的唯一前体。