The thermal cyclisation of the butynylbicyclooctanone is non regiospecific, and leads to products having a propellane or a cedrane skeleton. Conditions allowing exclusive formation of either type of products are given.
丁炔基双
环辛酮的热环化是非区域特异性的,并导致产生具有
丙炔或a烷骨架的产物。给出了允许任意形成任何一种产品的条件。