Synthesis 2009(12): 1960-1962  
DOI: 10.1055/s-0029-1216808
SHORTPAPER
© Georg Thieme Verlag Stuttgart ˙ New York

An Efficient Synthesis of Tetraalkyl 2,3,4,5-Thiophenetetracarboxylate Derivatives

Abdolali Alizadeh*, Reza Hosseinpour
Department of Chemistry, Tarbiat Modares University, P. O. Box 14115-175, Tehran 18716, Iran
Fax: +98(21)88006544; e-Mail: abdol_alizad@yahoo.com; e-Mail: aalizadeh@modares.ac.ir;
Further Information

Publication History

Received 8 February 2009
Publication Date:
12 May 2009 (online)

Abstract

A facile and direct synthetic entry to tetraalkyl 2,3,4,5-thiophenetetracarboxylate derivatives is described. This involves the reaction of dialkyl acetylenedicarboxylates with elemental sulfur in the presence of triethyl phosphite or an N-heteroaromatic compound such as isoquinoline, 1-methyl-1H-imidazole, or pyridine as catalyst.