Hydroxyhopanone (1) was converted via two alternative routes (1→9→11a→12→14→15→16 and 1→10→17→18→19→20) to A-neohop-21-ene (16) and A-neohop-3-ene (20), respectively. These unsaturated hydrocarbons (16 and 20) were found to be identical; this provided evidence to confirm the 21β-H configuration for 1.
羟基
茄酮(1)通过两种替代途径(1→9→11a→12→14→15→16 和 1→10→17→18→19→20 )分别转化为 A-neohop-21-ene (16) 和 A-neohop-3-ene (20)。这些不饱和碳氢化合物(16 和 20)被发现是相同的;这为证实 1 的 21β-H 构型提供了证据。