“Bulky-Yet-Flexible” α-Diimine Palladium-Catalyzed Reductive Heck Cross-Coupling: Highly Anti-Markovnikov-Selective Hydroarylation of Alkene in Air
作者:Xu-Wen Yang、Dong-Hui Li、A-Xiang Song、Feng-Shou Liu
DOI:10.1021/acs.joc.0c01509
日期:2020.9.18
regioselective and efficient reductive Heck reaction, a series of moisture- and air-stable α-diimine palladium precatalysts were rationally designed, readily synthesized, and fully characterized. The relationship between the structures of the palladiumcomplexes and the catalytic properties was investigated. It was revealed that the“bulky-yet-flexible”palladiumcomplexes allowed highly anti-Markovnikov-selective
Pd-Catalyzed reductive heck reaction of olefins with aryl bromides for Csp<sup>2</sup>–Csp<sup>3</sup> bond formation
作者:Liqun Jin、Jiaxia Qian、Nan Sun、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.1039/c8cc02571a
日期:——
We developed a Pd-catalyzed intermolecular reductive Heck reaction to construct Csp2–Csp3 bonds between arylbromides and olefins. Various styrene derivatives, acyclic and cyclic alkenes, were well tolerated to couple with varied arylbromides in linear selectivity. Kinetic and deuterium labeling experiments suggested that i-PrOH provides a hydride through β-H elimination.
One catalyst fits all! One catalyst is active for a wide set of benzylating reactions (see scheme). A tandem process allows the use of aldehydes and ketones as benzylating agents.
The copper-catalysed Suzuki–Miyaura coupling of alkylboron reagents: disproportionation of anionic (alkyl)(alkoxy)borates to anionic dialkylborates prior to transmetalation
作者:Prakash Basnet、Surendra Thapa、Diane A. Dickie、Ramesh Giri
DOI:10.1039/c6cc05114f
日期:——
A novel Cu-catalyzed Suzuki–Miyaura cross-coupling of alkylboron reagents with aryl and heteroaryl iodides is reported.