Nickel-Catalyzed Enantioselective Coupling of Aldehydes and Electron-Deficient 1,3-Dienes Following an Inverse Regiochemical Course

J Am Chem Soc. 2022 Oct 19;144(41):18817-18822. doi: 10.1021/jacs.2c09328. Epub 2022 Oct 4.

Abstract

The nickel catalyzed reductive coupling of aldehydes with sorbate esters and related electron-deficient 1,3-dienes are known in the literature to occur at the π-bond proximal to the ester to afford aldol-type products. In stark contrast to this established path, a VAPOL-derived phosphoramidite ligand in combination with a bench-stable nickel precatalyst brokers a regiocomplementary course in that C-C bond formation proceeds exclusively at the distal alkene site to give deoxypropionate type products carrying an acrylate handle; they can be made in either anti- or syn-configured form. In addition to this enabling reverse pathway, the reaction is distinguished by excellent levels of chemo-, diastereo-, and enantioselectivity; moreover, it can be extended to the catalytic formation of F3C-substituted stereogenic centers. The use of a dienyl pinacolboronate instead of a sorbate ester is also possible, which opens access to valuable chiral borylated building blocks in optically active form.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acrylates
  • Aldehydes / chemistry
  • Alkenes / chemistry
  • Catalysis
  • Electrons*
  • Esters
  • Ligands
  • Nickel* / chemistry
  • Polyenes
  • Stereoisomerism

Substances

  • Nickel
  • Ligands
  • Aldehydes
  • Alkenes
  • Esters
  • Polyenes
  • Acrylates