Preparation of Ni- or Pt-Containing Cyclic Esters by Oxidative Addition of Cyclic Carboxylic Anhydrides and Their Properties
作者:Kenji Sano、Takakazu Yamamoto、Akio Yamamoto
DOI:10.1246/bcsj.57.2741
日期:1984.10
Metal containing cyclic ester complexes, (Remark: Graphics omitted.)(L=1,2-bis(diphenylphosphino)ethane (dpe) or 2,2′-bipyridine (bpy); R1, R2=H or CH3) and (Remark: Graphics omitted.) (L=tricyclohexylphosphine (PCy3) or dpe; n=1 or 2), have been prepared by oxidative addition of cyclic carboxylic anhydrides to zero-valent metal complexes. These complexes have been characterized by elemental analysis
Site‐Selective 1,2‐Dicarbofunctionalization of Vinyl Boronates through Dual Catalysis
作者:Shang‐Zheng Sun、Yaya Duan、Riccardo S. Mega、Rosie J. Somerville、Ruben Martin
DOI:10.1002/anie.201916279
日期:2020.3.9
A modular, site-selective 1,2-dicarbofunctionalization of vinylboronates with organic halides throughdualcatalysis is described. This reaction proceeds under mild conditions and is characterized by excellent chemo- and regioselectivity. It thus represents a complementary new technique for preparing densely functionalized alkyl boron architectures from simple and accessible precursors.
Controlled Photoredox Ring-Opening Polymerization of <i>O</i>-Carboxyanhydrides
作者:Quanyou Feng、Rong Tong
DOI:10.1021/jacs.7b01462
日期:2017.5.3
Poly(α-hydroxyacids) are important biodegradable polymers with wide applications. Attempts to synthesize them from O-carboxyanhydrides with pendant functional groups by various methods, including methods involving organocatalysts or organometallics, have been plagued by uncontrolled polymerization, including epimerization for some monomers, which hampers the preparation of stereoregular high-molecular-weight
electron-rich nickel(0) centres to form nickel(0) complexes, whereas the isomeric 4-cyclohexene-1,2-dicarboxylic acid-anhydride reacts with ring opening of the anhydride to yield thermally stable acyl-carboxylato-nickel(II) compounds. The structure of a typical compound with (TMED)Ni0 as a complex fragment was determined by single crystal X-ray structural analysis, the crystal also containing the product
Reductive elimination of CCN compounds from nickel complexes as a reverse reaction for oxidative addition of benzonitriles to nickel
作者:Takakazu Yamamoto、Isao Yamaguchi、Mahmut Abla
DOI:10.1016/s0022-328x(03)00093-7
日期:2003.4
Treatment of (bpy)Ni(CN)(C6H4CN-o or -m) with acrylonitrile led to reductiveelimination of CNC6H4CN from the complex. The reductiveelimination proceeded much faster for the C6H4CN-m complex.