Journal
CHEMISTRYSELECT
Volume 6, Issue 41, Pages 11331-11336Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.202102455
Keywords
Allenes; Organosulfur; Sigmatropic rearrangement; N-Sulfanylimides; Sulfoxide
Categories
Funding
- Natural Sciences and Engineering research Council (NSERC) of Canada
- NSERC
- Ontario Government
- University of Guelph
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Sulfenyl chlorides can be used to access allenyl sulfoxides through sulfenate ester formation and [2,3]-sigmatropic rearrangement reactions. Thiosuccinimides are shown to be a viable alternative to sulfenyl chlorides for the synthesis of a variety of compounds.
Sulfenyl chlorides are a reliable starting material to access allenyl sulfoxides with aryl or haloalkyl groups by way of sulfenate ester formation followed by [2,3]-sigmatropic rearrangement. Application of the chemistry of alkanesulfenyl chlorides is much less common due to competing fates along the reaction pathway. In this paper, N-sulfanylsuccimides (thiosuccinimides) are shown to be a viable replacement for sulfenyl chlorides. A number of allenyl alkyl sulfoxides are prepared in fair to good yields (21-73 %, 21 examples). In addition, some butyn-1,4-diols can be selectively monofunctionalized to form allenyl sulfoxides (26-71 %) with a hydroxyalkyl group geminal to the sulfur. Butynediols also permit synthetic access to dienes via successive sulfenate ester formation and [2,3]-sigmatropic rearrangement reactions. N-2-Trimethylsilylethylthosucinimides were among the highest yielding of the thioimides.
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