Synthesis of 1,6-, 2,7-, 3,8-, and 4,9-isomers of didodecyl[1]benzothieno[3,2-b][1]benzothiophenes

J Org Chem. 2013 Aug 2;78(15):7741-8. doi: 10.1021/jo401134c. Epub 2013 Jul 23.

Abstract

The synthesis of 1,6-, 2,7-, 3,8-, and 4,9-isomers of dibromo- and didodecyl[1]benzothieno[3,2-b][1]benzothiophenes, via the stilbene pathway, is described. Starting from the synthesis of bromo-2-(methylthio)benzaldehydes, a series of functionalization, McMurry coupling, and finalising cyclization reactions were explored. The stereochemistry of the cyclization mechanism was investigated. Using this methodology didodecyl[1]benzothieno[3,2-b][1]benzothiophenes were formed in overall yields of 5-32%.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Molecular Structure
  • Stereoisomerism
  • Stilbenes / chemistry*
  • Thiophenes / chemistry*

Substances

  • Stilbenes
  • Thiophenes