Tetrahedron Letters
Volume 48, Issue 48, 26 November 2007, Pages 8424-8429
A highly stereoselective transformation of carboxylic esters to trisubstituted olefins via cationic cyclopropyl–allyl rearrangement of sulfonates of cis-1,2-disubstituted cyclopropanols
Dzmitry G. Kananovicha, Alaksiej L. Hurskia and Oleg G. Kulinkovich
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http://dx.doi.org/10.1016/j.tetlet.2007.09.172