The spiroenone (7), stereoselectively prepared from (+)-p-menth-1-ene (3) in four steps, was converted by two different reaction sequences into the natural sesquiterpenes (–)-acorenone (1) and (–)-acorenone B (2), respectively, thus establishing the absolute configuration of (1).
由(+)-对-薄荷1-烯(3)分四步立体选择制备的螺螺酮(7)通过两个不同的反应序列转化为天然
倍半萜(-)-烯酮(1)和(-) -aco烯酮B(2)分别建立(1)的绝对构型。