A semisynthetic strategy to access novel kauroxane or beyeroxane compounds from ‑kauranal or ‑beyerenal, respectively, is described. A Prins cyclization was used as a key step reaction to synthesize diterpene-tetrahydropyran hybrid compounds with high stereoselectivity by using 3-buten-1-ol as oxane precursor and indium trichloride as the Lewis acid catalyst. The absolute configurations of new compounds
描述了一种分别从 ‐kauranal 或 ‐beyerenal 中获取新型贝叶氧烷或贝叶兰化合物的半合成策略。以
3-丁烯-1-醇为氧烷前驱体,
三氯化铟为Lewis酸催化剂,以Prins环化反应为关键步骤,合成了高立体选择性的二萜-
四氢吡喃杂化化合物。新化合物的绝对构型通过机械方法确定,并通过 DFT 计算支持,并考虑与二萜手性纯度及其构象限制相关的立体选择性行为。这些结构通过其物理和光谱数据得以阐明。最后,目标分子的抗增殖活性完成,具有中等的
生物活性。