Direct remote asymmetric bisvinylogous 1,4-additions of cyclic 2,5-dienones to nitroalkenes

Org Lett. 2014 May 2;16(9):2370-3. doi: 10.1021/ol500700d. Epub 2014 Apr 24.

Abstract

Here we report that cyclic 2,5-dienones can act as bisvinylogous precursors through in situ generation of linear trienamine species with a cinchona-derived primary amine, and exclusively remote ε-regioselective 1,4-additions to nitroalkenes were accomplished in moderate to high enantioselectivity. Moreover, a diversity of complex spirocyclic frameworks could be efficiently constructed in an enantioenriched manner from these multifunctional 1,4-adducts via subsequent vinylogous iminium and even cascade iminium catalysis of the same amine.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkenes / chemistry*
  • Amines / chemistry*
  • Catalysis
  • Molecular Structure
  • Nitro Compounds / chemistry*
  • Stereoisomerism

Substances

  • Alkenes
  • Amines
  • Nitro Compounds