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Photochemical and thermal (2+2)-cycloaddition of thioxanthenethione to some aliphatic pentatetraenes

✍ Scribed by R.G Visser; E.A Oostveen; H.J.T Bos

Publisher: Elsevier Science
Year: 1981
Tongue: French
Weight: 119 KB
Volume: 22
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)90257-6

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✦ Synopsis

Reaction of thioxanthene-9-thione 1 with thealkyl substituted pentatetraenes 2a-g gives mixtures of the thietanes 3a-g and 4a-g. The ratio 3/4 in the thermal reaction is strongly dependent on the sub?tituents:-Ifi the case of 2a thermal rearrangement of the product leads to a stable thiete. __

During the last decade we investigated the photochemical reactions of thiocarbonyl compounds with acetylenes', allenes', ketenimines3 and butatrienes4(cf.5). Now, we wish to report on -

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