Pd–NHC Catalyzed Conjugate Addition versus the Mizoroki–Heck Reaction
作者:Aditya L. Gottumukkala、Johannes G. de Vries、Adriaan J. Minnaard
DOI:10.1002/chem.201003643
日期:2011.3.7
Ace of base: A catalytic system is presented that, solely by choice of the base, selectively switches between conjugateaddition and the Mizoroki–Heckreaction of aryl halides with Michael acceptors (see scheme; R, R′=alkyl, aryl). For conjugateadditionreactions, this avoids the preparation and use of organometallics.
Palladium(II) Acetate Catalyzed Reductive Heck Reaction of Enones; A Practical Approach
作者:Subramaniyan Mannathan、Saeed Raoufmoghaddam、Joost N. H. Reek、Johannes G. de Vries、Adriaan J. Minnaard
DOI:10.1002/cctc.201500760
日期:2015.12
A surprisingly practical Pd(OAc)2 or Pd(TFA)2‐catalyzed reductive Heckreaction between aryl iodides and α,β‐unsaturated ketones is described using N,N‐diisopropylethylamine (DIPEA, Hünigs base) as the reductant. In general, 1 mol % of Pd(OAc)2 is sufficient to afford good yields using electron‐rich or halogen‐substituted aryl iodides. Electron‐deficient aryl iodides preferentially give homocoupling