作者:Florian Glaus、Karl-Heinz Altmann
DOI:10.1002/anie.201409510
日期:2015.2.2
tiacumicin B, we have developed an efficient approach to the synthesis of the tiacumicin B aglycone. The synthesis features a high‐yielding intramolecular Suzuki cross‐coupling reaction to effect macrocyclic ring closure. Key steps in the synthesis of the macrocyclization precursor were a highly selective, one‐pot Corey–Peterson olefination and an ene–diene cross‐metathesis reaction. Depending on the
Tiacumicin B(脂霉素A3,非达索霉素)是一种非典型的大环内酯类抗生素,用于治疗艰难梭菌感染。Tiacumicin B也是结核分枝杆菌的有效抑制剂,但由于其口服生物利用度有限,因此不适合全身治疗。为提供结构活性研究的基础,该研究可能最终导致改进的头孢菌素B变异体,我们开发了一种有效的方法合成头孢菌素B糖苷配基。该合成具有高产量的分子内Suzuki交叉偶联反应,可实现大环闭环。合成大环化前体的关键步骤是高度选择性的一锅法Corey-Peterson烯烃化反应和ene-diene复分解反应。根据反应条件,