Synthesis of thiophenes and pyranone fused thiophenes by base induced inter and intramolecular C–S and C–C bond formation: a non-catalytic approach

• Tetrahedron Letters
  Volume 53, Issue 9, 29 February 2012, Pages 1056–1059

• Pushyamitra Mishra, 
• Hardesh K. Maurya, 
• Brijesh Kumar, 
• Vishnu K. Tandon, 
• Vishnu Ji Ram

•  
http://dx.doi.org/10.1016/j.tetlet.2011.12.066,

Abstract

An efficient and concise one pot synthesis of highly functionalized thiophenes and pyranone fused thiophenes has been delineated through base induced ring transformation of suitably functionalized 2H-pyran-2-ones by ethyl thioglycolate by inter and intramolecular C–S and C–C bond formation.