2-divinylcyclododecan-1-ol, which was easily converted to 5-cyclohexadecen-1-one. This one-step divinylation was found to proceed not through a direct displacement of the Grignard reagent with the chlorine atom, but through a pinacol-like rearrangement of a vinyl group.
2-chlorocyclododecan-1-one 与
乙烯基氯化镁(摩尔比为 1:2)反应直接得到 1,2-divinylcyclododecan-1-ol,它很容易转化为 5-cyclohexadecen-1-one。发现这种一步二
乙烯基化不是通过用
氯原子直接置换
格氏试剂,而是通过
乙烯基的
频哪醇样重排进行。