ation of functionalized aromatictriazenes is described. Using silver(I)-fluoride and different fluorinated (trimethyl)silyl substituted species, it was possible to synthesize various ortho-fluorinated triazenes in good yields via simple CH-substitution. Initial reactions under solvent-free (neat) conditions indicate a stabilizing interaction between “AgRf” and the triazene moiety, which may be responsible
Ortho-Trifluoromethylation of Functionalized Aromatic Triazenes
作者:Andreas Hafner、Stefan Bräse
DOI:10.1002/anie.201107414
日期:2012.4.10
A silver key to add CF3: In presence of in situ generated AgCF3, it is possible to trifluoromethylate aromatictriazenes in high ortho selectivity and good yields by means of a CH substitution (see scheme). Owing to the further transformation possibilities offered by triazenes, a variety of CF3‐substituted building blocks are then accessible.
Preparation of Aromatic Triazenes and Their Application in Silver-Mediated Perfluoroalkylation Reactions
作者:Stefan Bräse、Andreas Hafner、Christoph Hussal
DOI:10.1055/s-0033-1341249
日期:——
Herein, the syntheses of various functionalized 1,3-diisopropyltriaz-1-enes is described. This simple transformation tolerates a vast number of functional groups (e.g., halides) and allows the syntheses of 1,3-diisopropyltriaz-1-enes starting from commercially available aniline derivatives. These substrates are suitable for a range of silver-mediated perfluoroalkylation reactions.
Silver-Mediated Methoxycarbonyltetrafluoroethylation of Arenes
作者:Andreas Hafner、Thomas J. Feuerstein、Stefan Bräse
DOI:10.1021/ol401558z
日期:2013.7.5
of silver(I) fluoride, highly fluorinated olefins react readily under solvent-free conditions with arenes via CH-substitution. This transformation could be used to synthesize various methoxycarbonyltetrafluoroethylated aromatic triazenes and anisoles under high functional group tolerance. The method could be applied to the synthesis of a formal fluorinatedbioisostere of the NSAID flurbiprofen. To
Triazene as the Directing Group Achieving Highly <i>Ortho</i>-Selective Diborylation and Sequential Functionalization
作者:Shuai Mao、Bo Yuan、Xinyu Wang、Yahao Zhao、Lu Wang、Xue-Yan Yang、Yi-Ming Chen、San-Qi Zhang、Pengfei Li
DOI:10.1021/acs.orglett.2c00994
日期:2022.5.27
This study describes a regioselective ortho,ortho′-diborylation of aromatictriazenes catalyzed by [Ir(OMe)(cod)]2 in near-quantitative yields without an additional ligand. Aromatictriazenes act as both substrates and ligands. The X-ray structures of 2a and 2p indicate that the monoborylation products could promote the occurrence of diborylation. The synthesized triazene-substituted diboronate esters