ChemInform Abstract: Enantioselective [2,3]-Sigmatropic and [1,2]-Stevens Rearrangements via Intramolecular Formation of Allylic Oxonium Ylides Catalyzed by Chiral Dirhodium(II) Carboxylates.
Abstract
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ChemInform Abstract
Decomposition of diazoesters under optimized conditions A) generates allylic oxonium ylides which undergo enantioselective [2,3]-sigmatropic rearrangement yielding benzofuranones with moderate e.e.