Acylation of 5,13-di- tert-butyl-8,16-dimethyl[2.2]metacyclophane with acid anhydrides led to mono- ipso-acylation at the tert-butyl group to give 5-acyl-13- tert-butyl-8,16-dimethyl[2.2]metacyclophanes, from which the second electrophilic substitition with acid anhydrides can be strongly suppressed because of deactivation of the second aromatic ring by acyl group introduced by the through-space electronic interaction.
5,13-二叔丁基-8,16-二甲基[2.2]偏环烷与酸酐发生酰化反应后,在叔丁基上发生单-异-酰化反应,得到 5-酰基-13-叔丁基-8,16-二甲基[2.2]偏环烷,由于通过空间电子相互作用引入的酰基使第二个芳香环失去活性,因此与酸酐发生的第二次亲电取代反应受到强烈抑制。