Selective Suzuki-Miyaura Monocouplings with Symmetrical Dibromoarenes and Aryl Ditriflates for the One-Pot Synthesis of Unsymmetrical Triaryls
作者:Corinne Minard、Carole Palacio、Kevin Cariou、Robert H. Dodd
DOI:10.1002/ejoc.201400090
日期:2014.5
parameters that would permit selectiveSuzuki–Miyauramonocouplings of symmetrical dihaloarenes were studied. High selectivity and efficiency can be obtained for a broad range of substrates by using operationally simple conditions and widely available reagents. The 38 different examples described provide a valuable toolbox for the rapid access to unsymmetricaltriaryls, as illustrated by the preparation
General Chemoselective Suzuki–Miyaura Coupling of Polyhalogenated Aryl Triflates Enabled by an Alkyl-Heteroaryl-Based Phosphine Ligand
作者:Chau Ming So、On Ying Yuen、Shan Shan Ng、Zicong Chen
DOI:10.1021/acscatal.1c02146
日期:2021.7.2
describes a general chemoselective Suzuki–Miyauracoupling of polyhalogenated aryl triflates with the reactivity order of C–Cl > C–OTf using a Pd/L33 catalyst. The methine hydrogen and the steric hindrance offered by the alkyl bottom ring of L33 were found to be key factors in reactivity and chemoselectivity. With the Pd/L33 catalyst, a wide range of polyhalogenated (hetero)aryl triflates, which were independent
Palladium-Catalyzed Coupling of Biphenyl-2-yl Trifluoromethanesulfonates with Dibromomethane to Access Fluorenes
作者:Yanghui Zhang、Shulei Pan、Qiongqiong Zhu
DOI:10.1055/a-1770-1078
日期:2022.11
A facile and efficient method has been developed for the synthesis of fluorenes by Pd-catalyzed C–H alkylation of biphenyl-2-yl trifluoromethanesulfonates. The trifluoromethanesulfonates are more readily available and more environmentally benign than biphenyl iodides, and are advantageous substrates for traceless directing-group-assisted C–H activation. The reaction generates C,C-palladacycles as the
<b>
<scp>Palladium‐Catalyzed</scp>
Desulfinative
<scp>Cross‐Coupling</scp>
of Polyhalogenated Aryl Triflates with Aryl Sulfinate Salts: Inversion of Traditional Chemoselectivity
</b>
<sup>
<b>†</b>
</sup>
作者:Miao Wang、On Ying Yuen、Chau Ming So
DOI:10.1002/cjoc.202200695
日期:2023.4.15
general examples of palladium-catalyzed desulfinative cross-coupling reaction of polyhalogenated aryl triflates with aryl sulfinate salts showing an inversion of the conventional reactivity order of C—Br > C—Cl > C—OTf. The catalyst system, comprising of Pd(OAc)2 and tBuPhSelectPhos, exhibited excellent catalytic reactivity and chemoselectivity toward this reaction. This reaction had a wide range of
Repetitive Two-step Method for Oligoarene Synthesis through Rapid Cross-coupling of Hydroxyphenylboronic Acids and Anhydrides
作者:Shunpei Ishikawa、Kei Manabe
DOI:10.1246/cl.2006.164
日期:2006.2
A two-step Suzuki–Miyaura coupling–triflation procedure, which features the use of hydroxyphenylboronic acids or anhydrides in the palladium-catalyzed cross-coupling step, has been developed for the synthesis of oligoarenes.