<scp>Pd‐Catalyzed Site‐Selective</scp>
Borylation of Simple Arenes
<i>via</i>
Thianthrenation
<sup>†</sup>
作者:Xiao‐Yue Chen、Yu‐Hao Huang、Jian Zhou、Peng Wang
DOI:10.1002/cjoc.202000212
日期:2020.11
Site‐selective borylation of simple arenes was realized in one pot via an electrophilic thianthrenation/Pd‐catalyzed borylation sequence. The key to achieve this operatically simple process is the use of Pd catalysis, which could tolerate the solvent and acidic conditions used in the thianthrenation step. This protocol features mild conditions, broad functional group tolerance, and simple manipulations
Modular and Selective Arylation of Aryl Germanes (C−GeEt
<sub>3</sub>
) over C−Bpin, C−SiR
<sub>3</sub>
and Halogens Enabled by Light‐Activated Gold Catalysis
作者:Grant J. Sherborne、Avetik G. Gevondian、Ignacio Funes‐Ardoiz、Amit Dahiya、Christoph Fricke、Franziska Schoenebeck
DOI:10.1002/anie.202005066
日期:2020.9
rapid and programmable construction of bi‐ or multiaryls. To this end, the next frontier of synthetic modularity will likely arise from harnessing the coupling space that is orthogonal to the powerful Pd‐catalyzed coupling regime. This report details the realization of this concept and presents the fully selective arylation of aryl germanes (which are inert under Pd0/PdII catalysis) in the presence of
Flow synthesis of arylboronic esters bearing electrophilic functional groups and space integration with Suzuki–Miyaura coupling without intentionally added base
作者:Aiichiro Nagaki、Yuya Moriwaki、Jun-ichi Yoshida
DOI:10.1039/c2cc36197c
日期:——
We found that an integrated flowmicroreactor system enables the preparation of boronic esters bearing electrophilic functional groups using organolithium chemistry and that it allows for their use in Suzuki-Miyaura cross-coupling without intentionally added base. Based on this method, cross-coupling of two aryl halides bearing electrophilic functional groups was accomplished to obtain the corresponding
We have developed the divergent deaminative borylation and hydrodeamination of primaryaromaticamines using bis(pinacolato)diboron. These transformations can be switched by the reaction conditions. Mechanistic and computational studies have suggested that the cleavage of the C–N bond and the formation of C–B bond are unlikely to involve free aryl radical intermediates. However, hydrodeamination is
Light‐Induced Gold‐Catalyzed Hiyama Arylation: A Coupling Access to Biarylboronates
作者:Jin Xie、Kohei Sekine、Sina Witzel、Petra Krämer、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/anie.201806427
日期:2018.12.17
photochemical gold‐catalyzed chemo‐selective Hiyama arylation of B,Si bifunctionalized reagents with diazonium salts, which is orthogonal to common strategies and therefore a unique tool for synthesis of valuable biarylboronates. With this new methodology a wide array of diversely functionalized sp2‐ and sp3‐hybridized biarylboronates were obtained. Notably, the synergism of gold catalysis with copper catalysis