Synthesis of Virgatol and Virgatenol, Two Naturally Occurring Coumarins from <i>Pterocaulon virgatum</i> (L.) DC, and 7-(2,3-Epoxy-3-methylbutoxy)-6-methoxycoumarin, Isolated from <i>Conyza obscura</i> DC
作者:Norbert De Kimpe、Jan Demyttenaere、Stijn Vervisch、Silvia Debenedetti、Jorge Coussio、Dominick Maes
DOI:10.1055/s-2004-829139
日期:——
The synthesis of a number of naturally occurring cou- marins from Pterocaulon virgatum (L.) and Conyza obscura DC is described for the first time. It concerns the synthesis of 7-(2-hy- droxy-3-methoxy-3-methylbutoxy)-6-methoxycoumarin (virgatol, 1), 7-(2-hydroxy-3-methyl-3-butenyloxy)-6-methoxycoumarin (virgatenol, 2) and 7-(2,3-epoxy-3-methylbutoxy)-6-methoxycou- marin (3). In addition, a straightforward
首次描述了从 Pterocaulon virgatum (L.) 和 Conyza obscura DC 合成许多天然存在的香豆素。它涉及 7-(2-羟基-3-甲氧基-3-甲基丁氧基)-6-甲氧基香豆素 (virgatol, 1)、7-(2-羟基-3-甲基-3-丁烯氧基)-6-的合成甲氧基香豆素 (virgatenol, 2) 和 7-(2,3-epoxy-3-methylbutoxy)-6-methoxycoumarin (3)。此外,报道了东莨菪碱 (4) (7-hydroxy-6-methoxycoumarin) 的直接合成和新香豆素衍生物 6-methoxy-7-(2-oxo-3-methylbutoxy)coumarin 的合成。 7), 描述。众多香豆素的一个重要分类是基于核氧原子数量的任意但与生物遗传相关的系统。因此香豆素通常根据它们的氧化模式细分。7-(2-Hydroxy-