Superacidic Activation of Maleimide and Phthalimide and Their Reactions with Cyclohexane and Arenes
作者:Konstantin Yu. Koltunov、G. K. Surya Prakash、Golam Rasul、George A. Olah
DOI:10.1002/ejoc.200600486
日期:2006.11
When activated in the CF3SO3H/SbF5 acid system maleimide (1) and phthalimide (2) undergo selective ionic hydrogenation with cyclohexane to give 1,5-dihydropyrrol-2-one (3) and phthalimidine (11), respectively. When treated with aluminum halides, N-phenylmaleimide (4) reacts with cyclohexane to give N-phenylsuccinimide (5), whereas 2 still gives 11. Imide 1 also condenses with benzene in trifluoromethanesulfonic
当在 CF3SO3H/SbF5 酸体系中活化时,马来酰亚胺 (1) 和邻苯二甲酰亚胺 (2) 与环己烷进行选择性离子氢化,分别得到 1,5-二氢吡咯-2-酮 (3) 和邻苯二甲酰亚胺 (11)。当用卤化铝处理时,N-苯基马来酰亚胺 (4) 与环己烷反应生成 N-苯基琥珀酰亚胺 (5),而 2 仍然生成 11。酰亚胺 1 也在三氟甲磺酸 (CF3SO3H) 中与苯缩合生成 1,5-二氢- 5,5-diphenylpyrrol-2-one (7) 作为主要产品。然而,在卤化铝存在下,1 与苯、甲苯和邻二氯苯反应,分别生成 3-芳基琥珀酰亚胺 8-10。在三氟甲磺酸和卤化铝的作用下,酰亚胺 2 与苯反应生成 3,3-二苯基邻苯二甲酰亚胺 (12)。这些反应的机理,讨论了超亲电双阳离子中间体的潜在参与。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim