Abstract
A highly stereoselective 3 + 2 annulation has been developed by cyclopropanation of vinyl ethers with rhodium(II)-stabilized vinylcarbenoids to generate vinylcyclopropanes followed by a Et 2 AlCl-catalyzed 1,3-sigmatropic rearrangement. The success of this methodolgy rests on the remarkably stereoselectivity that is exhibited in both the cyclopropanation step and also the Et 2 AlCl-catalyzed vinylcyclopropane rearrangement
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