Synthesis of 2 H-Chromenes via Hydrazine-Catalyzed Ring-Closing Carbonyl-Olefin Metathesis
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The catalytic ring-closing carbonyl-olefin metathesis (RCCOM) of O-allyl salicylaldehydes to form 2H-chromenes is described. The method utilizes a [2.2.1]-bicyclic hydrazine catalyst and operates via a [3+2]/retro-[3+2] metathesis manifold. The nature of the a... ...
