A Protection-Free Synthetic Access to (±)-1-Deoxy-6-<i>epi</i>-castanospermine and (±)-1-Deoxy-6,8a-di-<i>epi</i>-castanospermine
作者:Angeliki-Theodora Serafidou、Efthymia G. Yioti、John K. Gallos
DOI:10.1002/ejoc.201201334
日期:2013.2
A new synthesis of (±)-1-deoxy-6-epi-castanospermine and (±)-1-deoxy-6,8a-di-epi-castanospermine has been developed, starting from the hetero-Diels–Alder adduct of ethyl 2-nitrosoacrylate and ethyl vinyl ether. Appropriate terminal dienes were prepared by standard manipulations, which, upon RCM followed by dihydroxylation and catalytic Raney Ni hydrogenation, led to the title compounds, which are of
已经开发了 (±)-1-deoxy-6-epi-castanospermine 和 (±)-1-deoxy-6,8a-di-epi-castanospermine 的新合成,从乙基的杂 Diels-Alder 加合物开始2-亚硝基丙烯酸酯和乙基乙烯基醚。通过标准操作制备合适的末端二烯,在 RCM 之后进行二羟基化和催化 Raney Ni 氢化,产生具有重要生物学意义的标题化合物。整个合成分八步完成,任何一步都不需要保护基团。