
Tetrahedron Letters p. 4519 - 4522 (1993)
Update date:2022-08-04
Topics:
Frere
Belyasmine
Gorgues
Duguay
Boubekeur
Batail
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.
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Doi:10.1248/cpb.47.1326
(1999)Doi:10.1016/j.bmc.2016.05.067
(2016)Doi:10.1016/0022-328X(93)83296-8
(1993)Doi:10.1002/chem.201501314
(2015)Doi:10.1016/S0040-4039(00)61562-9
(1993)Doi:10.1039/DT9930003829
(1993)