and 2, respectively) have been synthesized by Au(I)-catalyzed intramolecular hydroarylation (IMHA) of the relevant aryl propiolate esters (e.g., 13), which were themselves formed by reaction of the corresponding phenols with either 3-(trimethylsilyl)propiolic acid or propiolic acid and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride or dicyclohexylcarbodiimide. (±)-Purpurasol (3) was readily
标题
天然产物(分别为1和2)是通过Au(I)催化的相关
丙酸芳基酯(例如13)的分子内氢芳基化反应(I
MHA)合成的,它们本身是由相应的
酚与以下任何一种反应生成的3-(三甲
硅烷基)
丙炔酸或
丙炔酸和ñ - (3-二甲基
氨基丙基) - ñ '-ethylcarbodiimide盐酸盐或二环己基。(±)-Purpurasol(3)很容易通过既定程序从fraxetin(2)衍生而来。