Parallel synthesis of a desketoraloxifene analogue library via iodocyclization/palladium-catalyzed coupling

ACS Comb Sci. 2011 Sep 12;13(5):501-10. doi: 10.1021/co200090p. Epub 2011 Jul 13.

Abstract

For a future structure-activity relationship (SAR) study, a library of desketoraloxifene analogues has been prepared by parallel synthesis using iodocyclization and subsequent palladium-catalyzed coupling reactions. Points of desketoraloxifene diversification involve the two phenolic hydroxyl groups and the aliphatic amine side chain. This approach affords oxygen-bearing 3-iodobenzo[b]thiophenes 4 in excellent yields, which are easily further elaborated using a two-step approach involving Suzuki-Miyaura and Mitsunobu coupling reactions to give multimethoxy-substituted desketoraloxifene analogues 6. Various hydroxyl-substituted desketoraloxifene analogues 7 were subsequently generated by demethylation with BBr(3).

Publication types

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

MeSH terms

  • Catalysis
  • Chemistry Techniques, Synthetic*
  • Cyclization
  • Molecular Structure
  • Palladium / chemistry*
  • Small Molecule Libraries / chemical synthesis*
  • Small Molecule Libraries / chemistry*
  • Stereoisomerism
  • Thiophenes / chemical synthesis*
  • Thiophenes / chemistry

Substances

  • Small Molecule Libraries
  • Thiophenes
  • Palladium