Enantiomerically Pure Copper(I) and Zinc(II) Complexes of a Novel C3-Symmetric Polypyrazole Ligand

Christopher J. Tokar, Peter B. Kettler, William B Tolman

Research output: Contribution to journalArticlepeer-review

70 Scopus citations


We report the synthesis and characterization of the first enantiomerically pure C3-symmetric polypyrazole ligand, tris[(4S,7R)-7,8,8-trimethyl-4,5,6,7-tetrahydro-4,7-methano-2-indazolyl] phosphine oxide (OP-(camphpz)3, 2). The new optically active complexes [(η3-2)Cu(CH3CN)]BF4 (3), [(η3-2)Cu(X)] (X = Cl (4), X = O3SCF3 (5)), and [(η2-Zncl2] (6) were prepared. Complex 3 catalyzed the cyclopropanation of styrene with ethyl and 2,6-di-tert-butyl-4-methylphenyl diazoacetates with ee's of up to 60%.

Original languageEnglish (US)
Pages (from-to)2737-2739
Number of pages3
Issue number8
StatePublished - Aug 1 1992

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