A Synthesis of (1E,3E)-TMS Dienes from Keto-Xanthates via Chugaev-Type Elimination

Abstract : An efficient route leading to exclusively (1E,3E)-TMS dienes is described. Radical xanthate addition of keto-xanthates to vinyltrimethylsilane followed by one-pot Chugaev elimination/cyclization and in situ oxidation with m-CPBA afforded the corresponding TMS 2-sulfolenes. Isomerization to 3-sulfolenes by the action of DBU with the extrusion of sulfur dioxide in refluxing toluene gave the titled (1E,3E)-TMS dienes.
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Article dans une revue
Journal of Organic Chemistry, American Chemical Society, 2013, 78 (23), pp.12274-12279. 〈10.1021/jo402169v〉
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Contributeur : Denis Roura <>
Soumis le : mercredi 26 mars 2014 - 21:52:03
Dernière modification le : jeudi 11 janvier 2018 - 06:18:30

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Kelvin Kau Kiat Goh, Sunggak Kim, Samir Zard. A Synthesis of (1E,3E)-TMS Dienes from Keto-Xanthates via Chugaev-Type Elimination. Journal of Organic Chemistry, American Chemical Society, 2013, 78 (23), pp.12274-12279. 〈10.1021/jo402169v〉. 〈hal-00966617〉

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