Sesquiterpene Cyclizations inside the Hexameric Resorcinarene Capsule: Total Synthesis of δ‐Selinene and Mechanistic Studies
作者:Qi Zhang、Konrad Tiefenbacher
DOI:10.1002/anie.201906753
日期:2019.9.2
capsule was utilized as an artificial cyclase to catalyze the cyclization of sesquiterpenes. With the cyclization reaction as the key step, the first total synthesis of the sesquiterpene natural product δ-selinene was achieved. This represents the first total synthesis of a sesquiterpene natural product that is based on the cyclization of a linear terpene precursor inside a supramolecular catalyst
由于此类化合物的巨大结构多样性,萜烯天然产物的合成仍然是一项艰巨的任务。合成催化剂无法复制环化酶的从头到尾的萜烯环化,仅通过一些简单的线性萜烯底物即可形成这种多样性。最近,超分子结构已经成为有前途的酶模拟物。在本研究中,六聚间苯二甲烯胶囊被用作人工环化酶来催化倍半萜的环化。以环化反应为关键步骤,实现了倍半萜烯天然产物δ-selinene的首次全合成。这代表了倍半萜烯天然产物的第一个全合成,该合成基于超分子催化剂内部线性萜烯前体的环化。为了阐明反应机理,进行了详细的动力学研究和动力学同位素测量。令人惊讶地,获得的动力学数据表明限速包封步骤在倍半萜的环化中是可操作的。