Homopetasinic acid isolated from Diaporthe sp. strain 1308-05
作者:Atsushi Ito、Ikuya Kumagai、Miku Maruyama、Hayato Maeda、Akio Tonouchi、Tatsuo Nehira、Ken-ichi Kimura、Masaru Hashimoto
DOI:10.1016/j.tetlet.2016.01.095
日期:2016.3
Homopetasinic acid (1) was isolated from fungi of the Diaporthe sp. strain 1308-05. NMR spectroscopic structural analysis revealed a petasol (3) substructure and a (4E,6E)-7-carboxy-3-hydroxy-2-methylhepta-4,6-dienoate side chain. The absolute configuration of the petasol moiety was established by the specific rotation value after basic hydrolysis. The (2′S,3′S)-configuration of the side chain was
同丁香酸(1)是从Diaporthe sp。的真菌中分离的。株1308-05。NMR光谱结构分析显示,petasol(3)子结构和(4 E,6 E)-7-羧基-3-羟基-2-甲基庚基-4,6-二烯酸酯侧链。通过碱性水解后的比旋转值来确定petasol部分的绝对构型。侧链的(2'S,3'S)-构型是通过NMR经验方法以及光谱数据与相关模型化合物的比较确定的。侧链部分的绝对结构是在涉及理论计算的ECD光谱分析的基础上建立的。1的生物活性 也进行了讨论。