Revisiting Arene C(sp<sup>2</sup>
)−H Amidation by Intramolecular Transfer of Iridium Nitrenoids: Evidence for a Spirocyclization Pathway
作者:Yeongyu Hwang、Yoonsu Park、Yeong Bum Kim、Dongwook Kim、Sukbok Chang
DOI:10.1002/anie.201808892
日期:2018.10.8
Two mechanistic pathways, that is, electrocyclization and electrophilic aromatic substitution, are operative in most intramolecular C−H amination reactions proceeding by metal nitrenoid catalysis. Reported here is an alternative mechanistic scaffold leading to benzofused δ‐lactams selectively. Integrated experimental and computational analysis revealed that the reaction proceeds by a key spirocyclization
在通过金属类固醇催化进行的大多数分子内CH胺化反应中,有两种机理途径,即电环化和亲电子芳族取代。此处报道的是另一种机制性支架,可以选择性地导致苯并稠合的δ-内酰胺。综合的实验和计算分析表明,该反应通过关键的螺环化步骤进行,然后进行骨架重排。基于这种机理的见解,已开发出合成螺内酰胺的新途径。