A New Route to Annulated Oligothiophenes

A new convenient method for the construction of thiophene-annulated thieno[2,3-b]thiophenes has been proposed. The key step of the method is ring closure of 10H-bisthienodithiocin-10-one by strong bases. The syntheses of two previously unknown annulated oligothiophenes, thieno[2,3-b]thieno[3‘,2‘:4,5...

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Bibliographic Details
Published in:Organic letters 2004-09, Vol.6 (20), p.3437-3439
Main Authors: Nenajdenko, Valentine G, Sumerin, Viktor V, Chernichenko, Konstantin Yu, Balenkova, Elizabeth S
Format: Article
Language:English
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Summary:A new convenient method for the construction of thiophene-annulated thieno[2,3-b]thiophenes has been proposed. The key step of the method is ring closure of 10H-bisthienodithiocin-10-one by strong bases. The syntheses of two previously unknown annulated oligothiophenes, thieno[2,3-b]thieno[3‘,2‘:4,5]thieno[3,2-d]thiophene (1a) and thieno[3,2-b]thieno[2‘,3‘:4,5]thieno[3,2-d]thiophene (1b), have been described to illustrate the success of the method.
ISSN:1523-7060
1523-7052
DOI:10.1021/ol048835s