Synthetic studies toward Swinhoeisterol A: Synthesis of the 6/6/5/7 tetracyclic core
作者:Volha V. Kazlova、Alaksiej L. Hurski
DOI:10.1016/j.tetlet.2023.154840
日期:2024.1
6/6/5/7 Tetracyclic core of Swinhoeisterol A was constructed starting from Wieland-Miescher ketone and silylated ethyl 5–hydroxyvalerate. After modification, the bicyclic and linear subunits were assembled by means of cross-metathesis reaction. Then, cyclopentane C ring was formed by the intramolecular aldol condensation. C17-stereocenter was constructed using Claisen rearrangement followed by the
6/6/5/7 Swinhoeisterol A 的四环核心是从 Wieland-Miescher 酮和甲硅烷基化 5-羟基戊酸乙酯开始构建的。修饰后,通过交叉复分解反应组装双环和线性亚基。然后,通过分子内羟醛缩合形成环戊烷C环。C17-立体中心是使用克莱森重排和脱羰步骤构建的。最后,应用烯反应同时形成环庚烷D环和B环和C环之间的四取代双键。