The dispiroketones 4–6 have been synthesized and rearranged by treatment with acids yielding the bicyclic enone 36 under kinetic control and the [3.3.3]propellane 37 under thermodynamic control. The corresponding alcohols 10–12 all yield the [3.3.3]propellane 41. The rearrangement of [7,7-D2]-12 to [8,8-D2]-41 proceeds stereospecifically and points to dispirane 42 as potential precursor of (6±)-modhephene
通过使用酸处理合成并重新排列了双螺酮4-6,在动力学控制下生成了双环烯酮36,在热力学控制下生成了[3.3.3]
丙炔37。相应的醇10-12均产生[3.3.3]
丙炔41。[7,7-d的重新排列2 ] - 12至[8,8-d 2 ] - 41点进行立体专一性和指向dispirane 42如(6±)-modhephene潜在前体43。同样,双螺环烷44和46是(±)-
异丁烯45的潜在前体。