recently discovered antibiotic, has become a highly competitive synthetic target, due to its promising bioactivity and its unusual complex molecular architecture. Herein, a particularly concise total synthesis of platencin starting from inexpensive perillaldehyde is described. The key features of this approach are (1) a highly diastereoselective Diels−Alder reaction with Rawal’s diene—forming the first
在一年之内,由于其有希望的
生物活性和不寻常的复杂分子结构,最近发现的抗生素Platencin已成为极具竞争力的合成靶标。在此,描述了从廉价的
紫苏醛开始的特别简洁的全模板素的全合成。该方法的关键特征是:(1)与拉瓦尔的二烯发生非对映选择性的Diels-Alder反应,形成第一个全碳四元中心,(2)闭环易位生成应变的三齿骨架,(3)
水合/脱
水策略以有效地将环内烯烃转移至暴露位置,以及(4)将受阻酮烯酸酯1,4-加成至
丙烯酸甲酯以创建第二个全碳季中心。考虑到简洁(九个线性步骤)和10%的总产率,