Catalytic alkylation of arylGrignard reagents by iron(<scp>iii</scp>) amine-bis(phenolate) complexes
作者:Xin Qian、Louise N. Dawe、Christopher M. Kozak
DOI:10.1039/c0dt01239d
日期:——
[FeL2(μ-Cl)]2 (2) and [FeL3(μ-Cl)]2 (3). In the solid state, these complexes exist as chloride-bridged dimers giving distorted trigonal bipyramidal iron(III) ions. Reaction of H2L1 with FeBr3, however, results in the formation of a tetrahedral iron(III) complex possessing two bromide ligands. The amine-bis(phenolate) ligand is bidentate in this complex and bonds to the iron(III) ion via the phenolate O-donors
A Ball-Milling-Enabled Cross-Electrophile Coupling
作者:Andrew C. Jones、William I. Nicholson、Jamie A. Leitch、Duncan L. Browne
DOI:10.1021/acs.orglett.1c02096
日期:2021.8.20
cross-electrophile coupling of aryl halides and alkyl halides enabled by ball-milling is herein described. Under a mechanochemical manifold, the reductive C–C bond formation was achieved in the absence of bulk solvent and air/moisture sensitive setups, in reaction times of 2 h. The mechanical action provided by ball milling permits the use of a range of zinc sources to turnover the nickelcatalyticcycle, enabling
Iron(<scp>iii</scp>) amine-bis(phenolate) complexes as catalysts for the coupling of alkyl halides with aryl Grignard reagents
作者:Rajoshree Roy Chowdhury、Angela K. Crane、Candace Fowler、Philip Kwong、Christopher M. Kozak
DOI:10.1039/b713647a
日期:——
Catalytic cross-coupling of aryl Grignard reagents with primary and secondary alkyl halides bearing beta-hydrogens is achieved using Fe(III) amine-bis(phenolate) halide complexes.
Aryl bromides react with primary alkyl Grignardreagents in the presence of N,N,N′,N′-tetramethyl-1,3-propanediamine and catalytic amounts of cobalt(II) chloride and an N-heterocyclic carbene to yi...
在 N,N,N',N'-四甲基-1,3-丙二胺和催化量的氯化钴 (II) 和 N-杂环卡宾存在下,芳基溴化物与伯烷基格氏试剂反应生成...
Cobalt(diamine)-Catalyzed Cross-coupling Reaction of Alkyl Halides with Arylmagnesium Reagents: Stereoselective Constructions of Arylated Asymmetric Carbons and Application to Total Synthesis of AH13205
A cobalt-diamine complex catalyzes the cross-couplingreactions of primary and secondary alkyl halides with aryl Grignard reagents. It is confirmed that oxidative addition of alkyl halide to cobalt proceeds via a radical process. Optically pure Ueno-Stork halo acetals undergo diastereoselective cross-couplingreactions, the products of which are transformed into optically active THF derivatives. A