Abstract

Palladium pop rocks: Hold on to your CO2! Enantioselective palladium-catalyzed decarboxylative alkylation of ketone enolates proceeds via η1-σ-allyl palladium–carboxylate complexes, such as 1 (Pd yellow, O red, N blue, P purple), by slow loss of CO2. Reminiscent of pop rock candy, impure samples of 1 expel a gas (presumably CO2) in the solid state and effervesce in solution.

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