152265-70-8Relevant academic research and scientific papers
4,5-Diformyl-1,3-dithiol-2-ylidene substituted ethanals or ethanones and vinylogs of tetraformyltetrathiafulvalene from acetylenedicarbaldehyde and 3-thioxo-1,2-dithioles
Frere, Pierre,Belyasmine, Ahmed,Gouriou, Yvon,Jubault, Michel,Gorgues, Alain,et al.
, p. 975 - 984 (2007/10/02)
The cycloaddition of 3-thioxo-1,2-dithioles onto mono-(diEt)-acetal of acetylenedicarbaldehyde gives stable thials or thiones 5'.The thials are readily converted into 2 by dimerization with loss of sulfur, and the trans-configuration at the central C=C bond is demonstarated by UV-visible spectroscopy.For thiones or thials 5('), the conversion of the C=S to C=O group with mercutic acetate-acetic acid leads to trialdehydes 1.The X-ray structure and spectroscopic studies reveal a δ-cis conformation in all our X=S or X=O compounds due to S...S or S...O 1,5-interactions. cycloaddition / but-2-ynedial / 3-thioxo-1,2-dithiole / intramolecular interaction / TTF
Vinylogs of Tetrathiafulvalene (TTF) Bearing four 1,4-Dithiafulven-6-yl Substituents : Novel Highly Extended and Sulfur-rich ?-Donors
Belyasmine, Ahmed,Frere, Pierre,Gorgues, Alain,Jubault, Michel,Duguay, Guy,Hudhomme, Pietrick
, p. 4005 - 4008 (2007/10/02)
The title compounds 1 were synthesized from the mono-diEt-acetal of acetylenedicarbaldehyde and 2-thioxo-1,3-dithioles through three key steps: cyloaddition, dimerization-desulphurization of the resulting thials, and after deketalization, fourfold Wittig olefination of the tetraformyl TTF-vinylogs 4 with the P-ylids Wα-γ bearing the 1,3-dithiol-2-ylidene moiety.Cyclic voltammetry shows that these compounds are very strong ?-donors and good precursors of conducting cation-radical salts.
