H. Stahl, J. Appenzeller, et al.
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Paper
'Organic metals': Synthesis of dithiolylidenetetrathiapentalenones and their higher analogues
Abstract
Reaction of the tetrathiapentalene-2,5-dione (1) and 4,5-dimethoxycarbonyl- 1,3-dithiole-2-thione (2) with trimethylphosphite in refluxing benzene provides, along with the expected self-coupled products, the dithiolylidenetetrathiapentalenone (4; R = CO2Me) and its higher analogue (6; R = CO2Me).
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