Spatial Anion Control on Palladium for Mild C–H Arylation of Arenes
作者:Jyoti Dhankhar、Elisa González-Fernández、Chao-Chen Dong、Tufan K. Mukhopadhyay、Anthony Linden、Ilija Čorić
DOI:10.1021/jacs.0c09611
日期:2020.11.11
C-H arylation of arenes without the use of directing groups is a challenge, even for simple molecules, such as benzene. We describe spatial anion control as a concept for the design of catalytic sites for C-H bond activation, thereby enabling nondirected C-H arylation of arenes at ambient temperature. The mild conditions enable late-stage structural diversification of biologically relevant small molecules
AgOC(CF3)3, a soluble source, was found to be a convenient reagent for the one-pot preparation of Ag-NHC and M-NHC complexes starting from imidazoliums (M = Au, Ir, Pd and Ru).
AgOC(CF<sub>3</sub>)<sub>3</sub>: Synthesis and Applications of the First Donor-Free Silver(I) Alkoxide
作者:Andreas Reisinger、Nils Trapp、Ingo Krossing
DOI:10.1021/om061046p
日期:2007.4.1
The Li alkoxide LiORF (1) (RF = C(CF3)3) was quantitatively prepared by reacting stoichiometric amounts of LiH and HORF. Upon reaction of 1 with 1 equiv of AgBF4, the first donor-free Ag(I) alkoxide AgORF formed in 86% yield. The Ag alkoxide was then used for the preparation of trigonal bipyramidal [(AgL)3(ORF)2]+ cage cations (L = C2H4 (3), C4H8 (4)) stabilized by weakly coordinating [Al(ORF)4]- counterions
通过使化学计量的LiH和HOR F反应定量地制备Li醇盐LiOR F(1)(R F = C(CF 3)3)。当1与1当量的AgBF 4反应时,形成的第一个无供体的Ag(I)醇盐AgOR F的产率为86%。然后将醇银用于制备三角双锥体[[AgL)3(OR F)2 ] +笼型阳离子(L = C 2 H 4(3),C 4 H 8(4))通过弱配位[Al(OR F)4 ] -抗衡离子来稳定。图1至图4的特征在于多核NMR,IR和拉曼光谱以及它们的单晶X射线结构和附加的量子化学计算。
Investigation of Bis(Perfluoro‐
<i>tert</i>
‐Butoxy) Halogenates(I/III)
作者:Patrick Pröhm、Willi R. Berg、Susanne M. Rupf、Patrick Voßnacker、Sebastian Riedel
DOI:10.1002/chem.202103325
日期:2021.12.15
Chemistry with halogens in positiveoxidation states, especially the lighter halogens, is challenging due to their high oxidation potential. An ensemble of halogen +I and +III compounds with a comparatively large ligand system was synthesized and characterized with experimental and quantum-chemical methods. This study is envisioned as an example for the diverse but sometimes overlooked chemistry of
Site‐Selective C−H Arylation of Diverse Arenes Ortho to Small Alkyl Groups
作者:Jyoti Dhankhar、Micha D. Hofer、Anthony Linden、Ilija Čorić
DOI:10.1002/anie.202205470
日期:2022.9.26
pharmaceutically relevant arene classes were shown to undergo site-selective C−Harylationortho to endocyclic methylene groups. These results suggest that there might be a tendency for C−H activation next to alkylgroups, which could be seen as a general selectivity mode for C−H activation. This site-selectivity appears to be distinct from more common sterically and electronically dominated selectivity modes.