Transformations of Aryl Ketones via Ligand‐Promoted C−C Bond Activation
作者:Hanyuan Li、Biao Ma、Qi‐Sheng Liu、Mei‐Ling Wang、Zhen‐Yu Wang、Hui Xu、Ling‐Jun Li、Xing Wang、Hui‐Xiong Dai
DOI:10.1002/anie.202006740
日期:2020.8.17
The coupling of aromatic electrophiles (aryl halides, aryl ethers, aryl acids, aryl nitriles etc.) with nucleophiles is a core methodology for the synthesis of aryl compounds. Transformations of arylketones in an analogous manner via carbon–carbon bond activation could greatly expand the toolbox for the synthesis of aryl compounds due to the abundance of arylketones. An exploratory study of this
Synthesis of Aryl Trimethylstannanes from Aryl Amines: A Sandmeyer-Type Stannylation Reaction
作者:Di Qiu、He Meng、Liang Jin、Shuai Wang、Shengbo Tang、Xi Wang、Fanyang Mo、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201304579
日期:2013.10.25
Sandmeyer‐type stannylation: Stille coupling is one of the most powerful coupling reactions for CC bond formation, whereas there are only limited methods to access aryl stannane compounds. A mild stannylation process based on a Sandmeyer‐type transformation using aromatic amines as the starting materials is described. DCE: 1,2‐dichloroethane.
Transition-Metal-Free, Visible-Light-Enabled Decarboxylative Borylation of Aryl <i>N</i>-Hydroxyphthalimide Esters
作者:Lisa Candish、Michael Teders、Frank Glorius
DOI:10.1021/jacs.7b03127
日期:2017.6.7
Herein, we report a conceptually novel borylation reaction proceeding via a mild photoinduced decarboxylation of redox-activated aromatic carboxylic acids. This work constitutes the first application of cheap and easily prepared N-hydroxyphthalimideesters as aryl radical precursors and does not require the use of expensive transition metals or ligands. The reaction is operationally simple, scalable
demonstrated in the selective borylation of a variety of aromatics (>50 examples). This strategy was used in the late‐stage derivatization of pharmaceuticals and natural products. Computations reveal the mechanistic details of the unprecedented C−O bond activation of carboxylic acids. By circumventing the challenging decarboxylation, this strategy provides a general synthetic platform to access arylpalladium
Triaryl boron derivatives of pyridine as electron transporting materials for blue phosphorescent organic light-emitting diodes
作者:Jiewon Lee、Sunhee Lee、Jin-Hyoung Kim、Sang Ook Kang、Won-Sik Han
DOI:10.1016/j.orgel.2018.07.014
日期:2018.11
Two duryl borane derivatives, tris(2,3,5,6-tetramethyl-4-(pyridin-3-yl)phenyl)borane (TDPB) and tris(2,3,5,6-tetramethyl-4'-(pyridin-3-yl)biphenyl-4-yl)borane (TDPPB), which contain heteroaromatic pyridine rings at peripheral positions were synthesized to investigate the effects of bridging phenyl group on their thermal, photophysical, and electrochemical properties. Upon adding a phenyl unit between
两种duryl硼烷衍生物,三(2,3,5,6-四甲基-4-(吡啶-3-基)苯基)硼烷(TDPB)和三(2,3,5,6-四甲基-4'-(吡啶合成了在外围位置含有杂芳族吡啶环的-3-基)联苯基-4-基)硼烷(TDPPB),以研究桥联苯基对它们的热,光物理和电化学性质的影响。在duryl和吡啶单元之间添加苯基单元后,TDDPB的热稳定性(T d = 446°C,T g = 166°C)比TDPB(T d = 439°C和T g = 142°C)略高。无论TDPB和TDPPB具有较高的最高占据分子轨道能级来阻挡空穴/激子,并具有适当的最低未占据分子轨道能级,以实现平稳的电子注入。值得注意的是,TDPB和TDPPB分别具有相对较高的三线态能量,分别为2.84 eV和2.69 eV。因此,TDPB的三重态能级足以用于基于双[2-(4,6-二氟苯基)吡啶基-C 2,N ](吡啶并铱)铱(III)