Generation and reactivities of organocerium reagents

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Abstract
Organocerium reagents, prepared in situ by the treatment of organolithium compounds with cerium(III) iodide, exhibit characteristic reactivities toward ketones; at –65 °C, nucleophilic additions give the corresponding tertiary alcohols in excellent yields, while, at 0 °C to ca. room temperature, reductive coupling and/or reduction of the ketones prevail.