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Synthesis 1993; 1993(9): 853-854
DOI: 10.1055/s-1993-25953
short paper
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A Facile Synthesis of Bis(ethylenedithio)tetrathiafulvalene

Harald Müller* , Yoshinobu Ueba
  • *R & D Group, Sumitomo Electric Industries, 1-1-3 Shimaya, Konohana-ku, Osaka 554, Japan
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Publication Date:
29 April 2002 (online)

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5,6-Dihydro-1,3-dithiolo[4,5-b][1,4]dithiin-2-one (3) was prepared in one step starting from thiapendione (1; [1,3]dithiolo[4, 5-d][1,3]dithiole-2,5-dione) in 55% yield via 4,5-dimercapto-1, 3-dithiol-2-one (2). Coupling of 3 in triethyl phosphite gave bis(ethylenedithio)tetrathiafulvalene [4; BEDT-TTF; 2,2′-bi-(5, 6-dihydro-1,3-dithiolo[4,5-b][1,4]dithiinylidene)] in 85% yield. The conditions for the formation of intermediates like 2 by basic cleavage of 1 are briefly discussed.