Gold-Catalyzed Synthesis of Dibenzopentalenes - Evidence for Gold Vinylidenes
作者:A. Stephen K. Hashmi、Marcel Wieteck、Ingo Braun、Pascal Nösel、Linda Jongbloed、Matthias Rudolph、Frank Rominger
DOI:10.1002/adsc.201200086
日期:2012.3
converted to dibenzopentalenes in good yields by gold(I) catalysts. The participation of gold acetylides could be proven by the direct conversion to the corresponding gem‐diaurated dibenzopentalenes with a gold catalyst. From an experiment with a gold acetylide complex and stoichiometric amounts of the gold “catalyst” the corresponding gem‐diaurated complex of a dibenzopentalene could be obtained and characterized
Cascade Reactions of Aryl‐Substituted Terminal Alkynes Involving in Situ‐Generated α‐Imino Gold Carbenes
作者:Qiaoying Sun、Christopher Hüßler、Justin Kahle、Alexandra V. Mackenroth、Matthias Rudolph、Petra Krämer、Thomas Oeser、A. Stephen K. Hashmi
DOI:10.1002/anie.202313738
日期:2024.1.25
was achieved. It proceeds via an intermolecular gold carbene generation/C−H annulation followed by a 6-endo-dig cyclization or Pictet–Spengler reactions to selectively form fused indoles. The formation of 2-substitutedindoles and imidazoles derivatives through gold-catalyzed cyclization is also presented.
Synthesis of Naphthalenyl Triflates via the Cationic Annulation of Benzodiynes with Triflic Acid
作者:Chenxin Ge、Guohua Wang、Panpan Wu、Chao Chen
DOI:10.1021/acs.orglett.9b01590
日期:2019.7.5
A highly efficient and regioselective annulation of benzodiynes promoted by triflic acid has been developed. This protocol provides a step and atom-economic access to a series of naphthalenyl triflates. Furthermore, direct synthetic applications of this reaction are also elaborated through cross-coupling reactions to generate synthetically useful multisubstituted naphthalenes.