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.