Cycling between Au(i) and Au(iii) is challenging, so gold-catalyzed cross-couplings are rare. The (MeDalphos)AuCl complex, which we showed was prone to undergo oxidative addition, is reported here to efficiently catalyze the C-N coupling of aryl iodides and amines. The transformation does not require an externaloxidant or a directing group. It is robust and works with a wide scope of aryl iodides
Domino Aryne Annulation via a Nucleophilic–Ene Process
作者:Hai Xu、Jia He、Jiarong Shi、Liang Tan、Dachuan Qiu、Xiaohua Luo、Yang Li
DOI:10.1021/jacs.8b01005
日期:2018.3.14
1,2-Benzdiyne equivalents possess the unique property that they can react with two arynophiles through iteratively generated 1,2- and 2,3-aryne intermediates. Upon rational modification on the second leaving group of these aryne precursors, a domino aryne annulation approach was developed through a nucleophilic-ene reaction sequence. Various benzo-fused N-heterocyclic frameworks were achievable under transition metal-free conditions with a broad substrate scope.