One-pot approach to 1,2-disubstituted indoles via Cu(II)-catalyzed coupling/cyclization under aerobic conditions and its application for the synthesis of polycyclic indoles

J Org Chem. 2014 Oct 3;79(19):9000-8. doi: 10.1021/jo501250u. Epub 2014 Sep 22.

Abstract

A straightforward assembly of 1,2-disubstituted indoles has been developed through a Cu(II)-catalyzed domino coupling/cyclization process. Under aerobic conditions, a wide range of 1,2-disubstituted indole derivatives were efficiently and facilely synthesized from 2-alkynylanilines and boronic acids. 2-(2-Bromoaryl)-1-aryl-1H-indoles, which were selectively generated in one pot under the Cu catalysis, afforded the indolo[1,2-f]phenanthridines via Pd-catalyzed intramolecular direct C(sp(2))-H arylation. The one-pot tandem approaches to the polycyclic indole derivatives were also successfully achieved.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aniline Compounds / chemistry*
  • Boronic Acids / chemistry*
  • Copper / chemistry
  • Cyclization
  • Indoles / chemical synthesis*
  • Indoles / chemistry
  • Molecular Structure
  • Polycyclic Compounds / chemical synthesis*
  • Polycyclic Compounds / chemistry

Substances

  • Aniline Compounds
  • Boronic Acids
  • Indoles
  • Polycyclic Compounds
  • Copper