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

DOI: 10.1016/0040-4039(93)88074-S

Source and publish data:

Tetrahedron Letters p. 4519 - 4522 (1993)

Update date:2022-08-04

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Authors:

Frere Frere

Belyasmine

Gorgues Gorgues

Duguay Duguay

Boubekeur

Batail Batail

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Article abstract of DOI:10.1016/0040-4039(93)88074-S

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.

Full text of DOI:10.1016/0040-4039(93)88074-S

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