作者:Dimitri Hirsch-Weil、Khalil A. Abboud、Sukwon Hong
DOI:10.1039/c0cc02211j
日期:——
C
1-symmetric isoquinoline-based chiral diaminocarbene ligands (MIQ) have been developed to block three quadrants of the metal coordination sphere, complementing C2-symmetric biisoquinoline-based ligands (BIQ). MIQ-Cu complexes catalyzed conjugate borylation of various α,β-unsaturated amides in good yields (82–99%) and enantioselectivities (75–87% ee).
Heterogeneous versus Homogeneous Copper(II) Catalysis in Enantioselective Conjugate-Addition Reactions of Boron in Water
作者:Taku Kitanosono、Pengyu Xu、Shū Kobayashi
DOI:10.1002/asia.201300997
日期:2014.1
reported for the conjugateaddition of boron. Heterogeneous cat. 1 also gave high yields and enantioselectivities with some substrates and also gave the highest TOF (43 200 h−1) for an asymmetric conjugate‐additionreaction of boron. In addition, the catalyst systems were also applicable to the conjugateaddition of boron to α,β,γ,δ‐unsaturated carbonyl compounds, although such reactions have previously
The iridium/f-diaphos L2 or L9 catalyzedasymmetrichydrogenation of β-aryl β-keto amides (esters), and β-amino ketones to afford two enantiomers of the desired chiral alcohols was realized with 90%-99% yield and 73%-99% ee. This protocol could be easily conducted on gram scale in the presence of low catalyst loading (up to 9900 TON). Moreover, the hydrogenated products are versatile building blocks
Copper-Catalyzed Conjugate Addition of Diboron Reagents to α,β-Unsaturated Amides: Highly Reactive Copper-1,2- Bis(diphenylphosphino)benzene Catalyst System
作者:Heesung Chea、Hak-Suk Sim、Jaesook Yun
DOI:10.1002/adsc.200900040
日期:2009.4
Abstractmagnified imageAn efficient copper catalyst system for the β‐boration of α,β‐unsaturated amides has been developed. Copper‐bisphosphine complexes with small bite angles generate efficient catalyst systems for the successful conjugate addition of bis(pinacolato)diboron to a variety α,β‐unsaturated amides under mild conditions. This method was utilized in the formal synthesis of (S)‐fluoxetine.