Ambident effect of a p-sulfinyl group for the introduction of two carbon substituents to phenol rings: a convergent synthesis of diverse benzofuran neolignans

Org Lett. 2000 Jul 27;2(15):2279-82. doi: 10.1021/ol0001261.

Abstract

A convergent synthesis of diversely substituted benzofuran neolignans (8) is described employing a single p-sulfinyl group on the phenols (3) as an ambident functional group for two types of carbon-carbon bond-forming reactions: (i) the direct synthesis of the dihydrobenzofuran skeletons through an aromatic Pummerer-type reaction and (ii) the ipso-substitution of the sulfur functional group by carbon substituents through a ligand exchange reaction.

MeSH terms

  • Benzofurans / chemical synthesis*
  • Benzofurans / chemistry
  • Benzofurans / metabolism
  • Ligands
  • Lignans / chemical synthesis*
  • Lignans / chemistry
  • Lignans / metabolism
  • Lithium / metabolism
  • Phenols / chemistry
  • Phenols / metabolism
  • Sulfinic Acids / chemistry*
  • Sulfinic Acids / metabolism

Substances

  • Benzofurans
  • Ligands
  • Lignans
  • Phenols
  • Sulfinic Acids
  • kadsurenone
  • Lithium