Rh(III)-Catalyzed C-H Bond Addition/Amine-Mediated Cyclization of Bis-Michael Acceptors

Org Lett. 2016 Aug 5;18(15):3838-41. doi: 10.1021/acs.orglett.6b01846. Epub 2016 Jul 20.

Abstract

A Rh(III)-catalyzed C-H bond addition/primary amine-promoted cyclization of bis-Michael acceptors is reported. The C-H bond addition step occurs with high chemoselectivity, and the subsequent intramolecular Michael addition, mediated by a primary amine catalyst, sets three contiguous stereocenters with high diastereoselectivity. A broad range of directing groups and both aromatic and alkenyl C-H bonds were shown to be effective in this transformation, affording functionalized piperidines, tetrahydropyrans, and cyclohexanes.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Amines / chemistry*
  • Catalysis
  • Cyclization
  • Cyclohexanes / chemical synthesis*
  • Cyclohexanes / chemistry
  • Molecular Structure
  • Piperidines / chemical synthesis*
  • Piperidines / chemistry
  • Pyrans / chemical synthesis*
  • Pyrans / chemistry
  • Rhodium / chemistry*

Substances

  • Amines
  • Cyclohexanes
  • Piperidines
  • Pyrans
  • Rhodium