Stereoselective synthesis of indoline, tetrahydroquinoline, and tetrahydrobenzazepine derivatives from o-bromophenyl N-tert-butylsulfinyl aldimines

J Org Chem. 2014 Feb 7;79(3):1356-67. doi: 10.1021/jo402759v.

Abstract

The diastereoselective addition of an allylic indium intermediate to chiral o-bromophenyl sulfinyl imine 4 proceeded with good levels of diastereoselectivity. The resulting homoallylic amine derivatives were transformed into lactams 7 and 12, which upon copper-mediated intramolecular N-arylation led to the formation of benzo-fused 1-azabicyclo[j.k.0]alkanes 8 and 13. Benzo-fused 2-allyl-substituted heterocycles 14 could also be prepared by means of a palladium-catalyzed N-arylation of the corresponding free amines. The synthesis of the alkaloid (−)-angustureine was easily accomplished from (S)-2-allyltetrahydroquinoline (14b).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkanes / chemistry
  • Benzazepines / chemical synthesis*
  • Benzazepines / chemistry
  • Copper / chemistry
  • Imines / chemistry*
  • Indoles / chemical synthesis*
  • Indoles / chemistry
  • Lactams / chemistry*
  • Molecular Structure
  • Quinolines / chemical synthesis*
  • Quinolines / chemistry
  • Stereoisomerism
  • Sulfhydryl Compounds / chemistry*

Substances

  • Alkanes
  • Benzazepines
  • Imines
  • Indoles
  • Lactams
  • Quinolines
  • Sulfhydryl Compounds
  • indoline
  • Copper
  • 1,2,3,4-tetrahydroquinoline