152572-47-9

Upstream product

• 136057-45-9 5-Diethoxymethyl-2-[2-thioxo-1-p-tolyl-eth-(Z)-ylidene]-[1,3]dithiole-4-carbaldehyde 
• 3467-29-6 4-p-tolyl-1,2-dithiol-3-thione 
• 152547-66-5 5-Diethoxymethyl-2-[2-oxo-1-p-tolyl-eth-(Z)-ylidene]-[1,3]dithiole-4-carbaldehyde 

Downstream Products

• 153782-01-5 [4,5-bis-(4,5,6,7-tetrahydro-benzo[1,3]dithiol-2-ylidenemethyl)-[1,3]dithiol-2-ylidene]-p-tolyl-acetaldehyde 

Relevant 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

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

Cycloaddition of 3-thioxo-1,2-dithioles onto acetylenedicarbaldehyde and its mono-diethylacetal: Ready access to intermediates in the tetrathiafulvalene (TTF) series

The 4,5-diformyl-1,3-dithiol-2-ylidene ethanals and ethanones 4 are prepared by a three-step sequence from acetylenedicarbaldehyde mono-diEt-acetal and 3-thioxo-1,4-dithioles. Their X-ray diffraction structure, 1H nmr and IR properties, reveal a δ-cis conformation in the solid state and in solution, due to strong S...O 1,5-internal bonding interactions.