New Copper and Rhodium Cyclopropanation Catalysts Supported by Chiral Bis(pyrazolyl)pyridines. A Metal-Dependent Enantioselectivity Switch

David L. Christenson, Christopher J. Tokar, William B. Tolman

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

Copper and rhodium complexes of new optically pure bis(pyrazolyl)pyridines catalyze the cyclopropanation of styrene with moderate to high enantioselectivities, but the sense of asymmetric induction observed depends on the nature of the metal ion, implicating interesting mechanistic differences between the copper- and rhodium-based systems.

Original languageEnglish (US)
Pages (from-to)2148-2150
Number of pages3
JournalOrganometallics
Volume14
Issue number5
DOIs
StatePublished - May 1995

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