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The development of a new method for the diamination of alkenes is reported. It is based on a reaction in the presence of stoichiometric or catalytic amounts of chiral auxiliaries, which permits the direct synthesis of enantiomerically enriched osmaimidazolidines. The combined application of a catalyst‐directing oxazolidinone group and a titanium catalyst results in enantioselective alkene diamination with enantiomer ratios of up to 95:5. Absolute configurations of representative osmaimidazolidine products were established unambiguously by solid‐state structure analyses. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
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Almodóvar et al. (2005) studied this question.
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