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First examples of the catalytic asymmetric ring-opening of meso 1,2-dioxines utilising cobalt(II) complexes with optically active tetradentate Schiff base ligands: formation of enantio-enriched cyclopropanes. 2002

Thomas D Avery, and Natalie F Jenkins, and Marc C Kimber, and David W Lupton, and Dennis K Taylor
Department of Chemistry, Adelaide University, South Australia, Australia, 5005.

The combination of chiral cobalt beta-ketoiminato or cobalt salen complexes and meso 1,2-dioxines leads to catalytic asymmetric ring-opening affording enantio-enriched cis gamma-hydroxy enones; subsequent capture by an ylide affords enantio-enriched cyclopropanes.

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