21524-36-7Relevant articles and documents
A Metal-Free Direct Arene C?H Amination
Wang, Tao,Hoffmann, Marvin,Dreuw, Andreas,Hasagi?, Edina,Hu, Chao,Stein, Philipp M.,Witzel, Sina,Shi, Hongwei,Yang, Yangyang,Rudolph, Matthias,Stuck, Fabian,Rominger, Frank,Kerscher, Marion,Comba, Peter,Hashmi, A. Stephen K.
supporting information, p. 2783 - 2795 (2021/04/05)
The synthesis of aryl amines via the formation of a C?N bond is an essential tool for the preparation of functional materials, active pharmaceutical ingredients and bioactive products. Usually, this chemical connection is only possible by transition metal-catalyzed reactions, photochemistry or electrochemistry. Here, we report a metal-free arene C?H amination using hydroxylamine derivatives under benign conditions. A charge transfer interaction between the aminating reagents TsONHR and the arene substrates enables the chemoselective amination of the arene, even in the presence of various functional groups. Oxygen was crucial for an effective conversion and its accelerating role for the electron transfer step was proven experimentally. In addition, this was rationalized by a theoretical study which indicated the involvement of a dioxygen-bridged complex with a “Sandwich-like” arrangement of the aromatic starting materials and the aminating agents at the dioxygen molecule. (Figure presented.).
Mechanistic insight into N=N cleavage by a low-coordinate iron(II) hydride complex
Sadique, Azwana R.,Gregory, Elizabeth A.,Brennessel, William W.,Holland, Patrick L.
, p. 8112 - 8121 (2008/02/05)
The reaction pathways of high-spin iron hydride complexes are relevant to the mechanism of N2 reduction by nitrogenase, which has been postulated to involve paramagnetic iron-hydride species. However, almost all known iron hydrides are low-spin
Pseudorotaxanes and rotaxanes incorporating cycloheptatrienyl stations - Synthesis and co-conformation
Grubert, Lutz,Jacobi, Dirk,Buck, Karin,Abraham, Werner,Muegge, Clemens,Krause, Eberhard
, p. 3921 - 3932 (2007/10/03)
Novel [2]rotaxanes containing the tetracationic cyclophane cyclobis(paraquat-4,4′-biphenylene), linked mechanically to a dumbbell-shaped molecular thread incorporating a pair of diaryl cycloheptatriene units, have been synthesised in moderate yields of up