radical-mediated intramolecular coupling of two C–H bonds of N,N-diisopropyl benzamides was developed. The reactions can proceed in moderate to high yield and with excellent chemoselectivity. A reaction sequence of the formation of an alkyl radical via oxidative cleavage of alkyl C–H bond and the formation of lactam ring via intramolecular homolytic aromatic substitution was proposed.
开发了一种通过自由基介导的 N,N-二异丙基苯甲酰胺的两个 C-H 键分子内偶联来构建 3,3-二甲基
异吲哚啉酮的无
金属方法。反应可以以中等到高产率进行,并具有出色的
化学选择性。提出了通过烷基C-H键氧化裂解形成烷基自由基和通过分子内均裂芳族取代形成内酰胺环的反应顺序。