ChemInform Abstract: Synthesis of CF3‐Containing 3,3′‐Cyclopropyl Spirooxindoles by Sequential [3 + 2] Cycloaddition/Ring Contraction of Ylideneoxindoles with 2,2,2‐Trifluorodiazoethane.
Abstract:This is the first example of [3 + 2] cycloaddition/ ring contraction sequence under transition‐metal‐free conditions yielding the title spiro compounds.
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