A Convergent Total Synthesis of the Mucin Related F1<i>α</i>Antigen by One-Pot Sequential Stereoselective Glycosylation
作者:Teruaki Mukaiyama、Kazuhiro Ikegai、Hideki Jona、Takashi Hashihayata、Kazuya Takeuchi
DOI:10.1246/cl.2001.840
日期:2001.8
A convergent total synthesis of F1α antigen, a member of the tumor-associated O-linked mucin glycosyl amino acids, was accomplished by one-pot sequential glycosylation. In the first step, the corresponding disaccharide was formed from galactosyl phenylcarbonate 2 or fluoride 3 and thioglycoside 4 by the promotion of TrB(C6F5)4 or TfOH, and following glycosylation of glycosyl amino acid 5 by further
F1α 抗原是肿瘤相关 O 联粘蛋白糖基氨基酸的一个成员,通过一锅顺序糖基化完成了会聚全合成。在第一步中,通过 TrB(C6F5)4 或 TfOH 的促进,由半乳糖基苯基碳酸酯 2 或氟化物 3 和硫糖苷 4 形成相应的二糖,然后通过进一步添加 N-碘代琥珀酰亚胺 (NIS) 使糖基氨基酸 5 糖基化分别以 80% 或 89% 的总产率提供受保护的 F1α。通过随后的去保护,F1α抗原以良好的产量获得。