The absolute configuration of boschnaloside was established by chemical correlation of asperuloside tetraacetate with boschnaloside tetraacetate. During this work it was also found that catalytic reduction of asperuloside tetraacetate gave either of the two C-8 epimers (4) and (5), depending upon the kind of catalyst used, PtO2 or Pd-C. The absolute structure of boschnaloside was also confirmed by its degradation to 3(R)-cis, cis-boschnialinic acid. Finall, conversion of genipin into boschnaloside was also achieved.
通过阿peruloside tetraacetate 和boschnaloside tetraacetate 的
化学关联建立了boschnaloside 的绝对构型。在这项工作中,我们还发现,根据所使用的催化剂 PtO2 或 Pd-C 的类型,
四乙酸阿芦苷的催化还原可产生两种 C-8 差向异构体 (4) 和 (5)。 Boschnaloside 的绝对结构也通过其降解为 3(R)-cis,cis-Boschnialinic Acid 得到证实。最后还实现了
京尼平向博施那洛苷的转化。