Abstract
AbstractWe disclose an concise synthesis of alkynylcyclopropane derivatives containing adjacent quaternary carbon centers via a transition‐metal free cascade enyne rearrangement and cyclopropanation process. This methodology, started from a variety of allenylphosphine oxides and N‐tosylhydrazones, features the advantage of transition‐metal‐free, operational simplicity, wide substrate scope and good functional group tolerance.magnified image
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