Preparation and bactericidal activity of oxidation derivatives of austroeupatol, an ent-nor-furano diterpenoid of the labdane series from Austroeupatorium inulifolium
作者:Pablo A. Chacón-Morales、Juan M. Amaro-Luis、Luis Beltrán Rojas Fermín、Philippe A. Peixoto、Denis Deffieux、Laurent Pouységu、Stéphane Quideau
DOI:10.1016/j.phytol.2018.11.007
日期:2019.2
From aerial parts of Austroeupatorium inulifolium was obtained austroeupatol (1). The treatment of 1 with IBX generated the ketone 2 and keto-aldehyde 3. Due to the structural features of 1, the hydroxy group corresponding to the primary alcohol (at C-19) is less reactive than the oxymethine hydroxy groups of the structure. The oxidative cleavage of 1 produced the hemiacetal 4, since this reaction
从大叶菊属植物的空中部分获得奥古帕特罗(1)。用IBX处理1产生了酮2和酮醛3。由于1的结构特征,与伯醇相对应的羟基(在C-19处)的反应性比结构中的甲氧烷基羟基低。的氧化裂解1产生的半缩醛4,因为该反应是定量的,并仅检测到该化合物中,提出了涉及一个过渡状态的解释的产生形成了反应机理4。评估了这些氧化衍生物对四(4)个细菌菌株[两个革兰氏阳性(+)和两个革兰氏阴性(-)]的杀菌活性:金黄色葡萄球菌,粪肠球菌,大肠杆菌和铜绿假单胞菌。