Silica-immobilized chiral dirhodium(II) catalyst for enantioselective carbenoid reactions

Org Lett. 2013 Dec 20;15(24):6136-9. doi: 10.1021/ol403006r. Epub 2013 Nov 19.

Abstract

A silica-supported dirhodium(II) tetraprolinate catalyst was synthesized in four steps from l-proline and used in a range of enantioselective transformations of donor/acceptor carbenoids. These include cyclopropenation, cyclopropanation, tandem ylide formation/[2,3] sigmatropic rearrangement, and a variety of combined C-H functionalization/Cope rearrangement reactions. The products of these transformations were obtained in yields and levels of enantioselectivity comparable to those obtained with its homogeneous counterpart, Rh2(S-DOSP)4. The silica-supported Rh2(S-DOSP)4 derivative was successfully recycled over five reactions.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Catalysis
  • Methane / analogs & derivatives*
  • Methane / chemistry
  • Molecular Conformation
  • Organometallic Compounds / chemical synthesis
  • Organometallic Compounds / chemistry*
  • Proline / chemistry
  • Rhodium / chemistry*
  • Silicon Dioxide / chemistry*
  • Stereoisomerism

Substances

  • Organometallic Compounds
  • carbene
  • Silicon Dioxide
  • Proline
  • Rhodium
  • Methane