Novel Protoilludane Lead Structure for Veterinary Antibiotics: Total Synthesis of Pasteurestins A and B and Assignment of Their Configurations
作者:Marion Kögl、Lothar Brecker、Ralf Warrass、Johann Mulzer
DOI:10.1002/ejoc.200800074
日期:2008.6
bovine respiratory disease. These properties qualified 1 and 2 as potential lead structures for new veterinary antibiotics; however, neither the absolute nor the relative configurations had been determined, nor were the compounds available any longer. We thus developed total syntheses of 1 and 2 and clarified their structures and their biological profiles. Key steps were two [2+2+2] CpCo(CO)2-mediated
在最近的一项专利中公开了两种新的原油烷倍半萜类化合物,称为巴氏杀菌素 A 和 B(1 和 2)。据报道,这些化合物对某些溶血性曼海姆氏菌菌株表现出强烈的选择性活性,这些菌株是牛呼吸道疾病的病原体。这些特性使 1 和 2 成为新兽用抗生素的潜在先导结构;然而,既没有确定绝对构型也没有确定相对构型,化合物也不再可用。因此,我们开发了 1 和 2 的全合成,并阐明了它们的结构和生物学特征。关键步骤是两种合成中的两个 [2+2+2] CpCo(CO)2 介导的 Vollhardt 环加成,以及 2 合成中锡介导的不对称 Reformatsky 型缩合反应,产物分布随温度变化。