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(a) A general mechanistic scheme for the decarboxylative chlorination of β-ketocarboxylic acids. (b) Neither C1 nor C1′ mediated the chlorination of ketone 5a even in the presence of c-Hex-CO2H (c-Hex=cyclohexyl). (c) C1 was chlorinated during the course of decarboxylative chlorination to yield C1′. (d) Control experiments to identify the catalytic species and chlorination species.
