The thio-Claisen rearrangement is a general and facile process that is often advantageous over the standard Claisen rearrangement. Several asymmetric variants of the thio-Claisen rearrangement have been reported. The rearrangement of sulfonium salts and sulfoxides takes place even more readily. Alkenyl sulfoxides and sulfilimines undergo a highly stereocontrolled cyclization to lactones and lactams, respectively, upon reaction with haloketenes; this synthetically useful process entails a [3,3]-sigmatropic rearrangement of a zwitterionic intermediate. Sulfur-containing functionalities located at the periphery of the Claisen substrates exert a powerful influence on the outcome of the process. © Springer-Verlag 2006.
CITATION STYLE
De La Pradilla, R. F., Tortosa, M., & Viso, A. (2007, February 13). Sulfur participation in [3,3]-sigmatropic rearrangements. Topics in Current Chemistry. https://doi.org/10.1007/128_059
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