Total synthesis of (±) -solavetivone (1), a spirovetivane phytoalexin, was achieved. The metal catalyzed decomposition of the phenolic diazoketone (8) gave the spiro-dienone (6), selective reduction of which afforded the hydroxy-enone (5). The regio-and stereo-selective Birch reduction of 5 provided a high yield of the hydroxy-spiro-enone (9), whose structure was determined by X-ray crystal analysis. Compound 9 was transformed to (±) -1 and the aglycone A3 in several steps.
实现了(±)-solavetivone (1)的全合成,这是一种螺烷植物毒素。在
金属催化下,
酚类重
氮酮(8)分解得到螺二酮(6),选择性还原得到羟基烯酮(5)。对 5 进行区域和立体选择性的桦木还原,得到了高产率的羟基螺烯酮(9),并通过 X 射线晶体分析确定了其结构。化合物 9 通过几个步骤转化为 (±) -1 和苷元 A3。