Synthesis, Characterization, and Bioactivity of the Lichen Pigments Pulvinamide, Rhizocarpic Acid, and Epanorin and Congeners
作者:Patrick J. C. James、Daniel Vuong、Stephen A. Moggach、Ernest Lacey、Matthew J. Piggott
DOI:10.1021/acs.jnatprod.2c01013
日期:2023.3.24
The lichen natural products pulvinamide, rhizocarpic acid, and epanorin have been synthesized and characterized spectroscopically and by X-ray crystallography. The syntheses, by ring-opening of pulvinic acid dilactone (PAD), may well be biomimetic, given the well-known occurrence of PAD in lichen. The enantiomers, ent-rhizocarpic acid and ent-epanorin, and corresponding carboxylic acids, norrhizocarpic
合成了地衣天然产物 pulvinamide、rhizocarpic Acid 和 epanorin,并通过光谱和 X 射线晶体学进行了表征。鉴于 PAD 在地衣中的存在,通过 PAD 开环进行的合成很可能是仿生的。类似地制备对映体,对映根果酸和对映-依帕诺林,以及相应的羧酸,去甲根果酸和去甲诺林。评估所有化合物对选定细菌、真菌、原生生物、哺乳动物肿瘤细胞系和正常细胞的生长抑制活性。根果酸具有弱抗菌作用(枯草芽孢杆菌MIC = 50 μg/mL),并具有适度但选择性的抗肿瘤活性(NS-1 鼠骨髓瘤 MIC = 3.1 μg/mL),相对于其对映体,其效力 >10 倍(MIC = 50 μg) /毫升)。