Rhodium(III)-Catalyzed Kinetic Resolution of Racemic 1,6-Dienes via Asymmetric Borylative Cyclization

Org Lett. 2020 May 1;22(9):3661-3666. doi: 10.1021/acs.orglett.0c01156. Epub 2020 Apr 10.

Abstract

The rhodium(III)-catalyzed kinetic resolution of racemic nonactivated terminal alkene-tethered cyclohexadienones (1,6-dienes) has been developed with high to excellent selectivities (s up to 458) via asymmetric borylative cyclization, providing recovered cyclohexadienones and cis-hydrobenzofuranones with good to excellent yields and enantioselectivities (up to 99% ee). This reaction shows broad functional group tolerance and allows the further conversions of these two-type products to many optically active derivatives bearing multiple functionalities via Rh, Cu, Pd, and Ag catalysis.

MeSH terms

  • Alkenes
  • Catalysis
  • Cyclization
  • Polyenes
  • Rhodium*
  • Stereoisomerism

Substances

  • Alkenes
  • Polyenes
  • Rhodium