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Nickela-2-oxazolidinones, formed by oxidative coupling of imines and CO 2 with Ni 0, react with LiCl under mild conditions (4 °C, 1 atm) to afford vicinal diamines in up to 89% yield. The reaction is the first organometallic example of reductive imine coupling requiring CO 2 . In this system, CO 2 is participatory and is not incorporated in the reaction products. These results represent an important addition to our understanding of the reactivity of metallacycles derived from CO 2 and unsaturated compounds.
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Graët et al. (2010) studied this question.
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