A new method for translating the asymmetric Ni/Cr-mediated coupling reactions from stoichiometric to catalytic |
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| Authors: | Namba Kosuke Cui Sheng Wang Jiashi Kishi Yoshito |
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| Institution: | Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA. |
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| Abstract: | reaction: see text] A new method has been developed for effectively translating the degree of asymmetric induction and the chemical yield achieved in the stoichiometric asymmetric Ni/Cr-mediated coupling to a catalytic asymmetric process via a chiral sulfonamide ligand. It has also been shown that the Ni catalyst plays a central role. Among a number of the Ni catalysts, the 2,9-dimethylphenanthroline/NiCl(2) complex (7) has been found to be the most effective. |
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