We report a remote arylation in less than 10 min reaction time at room temperature over a distance of up to 11 carbons. The unprecedentedspeed is enabled by the air-stable PdI dimer [Pd(μ-I)(PCy2tBu)]2.
efficient palladium‐catalyzed chlorocarbonylation of aryl (pseudo)halides that gives access to a wide range of carboxylic acid derivatives has been developed. The use of butyryl chloride as a combined CO and Cl source eludes the need for toxic, gaseous carbon monoxide, thus facilitating the synthesis of high‐value products from readily available aryl (pseudo)halides. The combination of palladium(0), Xantphos
Inverting Conventional Chemoselectivity in the Sonogashira Coupling Reaction of Polyhalogenated Aryl Triflates with TMS-Arylalkynes
作者:Miao Wang、Chau Ming So
DOI:10.1021/acs.orglett.1c04138
日期:2022.1.21
Sonogashira couplingreaction with excellent chemoselectivity, affording an inversion of the conventional chemoselectivity order of C–Br > C–Cl > C–OTf. This study also provided an efficient approach to the synthesis of polycyclic aromatic hydrocarbons (PAHs) and the natural product analogue trimethyl-selaginellin L by merging of chemoselective Sonogashira and Suzuki–Miyaura couplingreactions.
Palladium‐Catalyzed Chemoselective Borylation of (Poly)halogenated Aryl Triflates and Their Application in Consecutive Reactions
作者:Shan Shan Ng、Zicong Chen、On Ying Yuen、Chau Ming So
DOI:10.1002/adsc.202101501
日期:2022.4.26
This study reports the palladium-catalyzed chemoselective borylation of (poly)halogenated aryl triflates with a reactivity order of C−Cl>C−OTf. A catalyst system comprising Pd(OAc)2 and SelectPhos (L1) enables a reaction with high reactivity and chemoselectivity. The consecutively chemoselective borylation reaction followed by the chemoselective intermolecular Suzuki-Miyaura reaction can be performed
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