Volume 41, Issue 16 pp. 2953-2956
Communication

An Efficient and Highly Enantio- and Diastereoselective Cyclopropanation of Olefins Catalyzed by Schiff-Base Ruthenium(II) Complexes

Jason A. Miller

Jason A. Miller

Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL 60208-3113 (USA) Fax: (+1) 847-467-5123

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Wiechang Jin Dr.

Wiechang Jin Dr.

Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL 60208-3113 (USA) Fax: (+1) 847-467-5123

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SonBinh T. Nguyen Prof. Dr.

SonBinh T. Nguyen Prof. Dr.

Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL 60208-3113 (USA) Fax: (+1) 847-467-5123

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We thank the reviewers for their helpful comments. Support from the DuPont Company and the Beckman, Dreyfus, and Packard Foundations are gratefully acknowledged. S.T.N. is an Alfred P. Sloan Fellow.

Graphical Abstract

Both electron-rich and electron-deficient olefins—such as styrene and methyl methacrylate—undergo efficient (yields >90 %) cyclopropanation with ethyl diazoacetate as the carbene source to give predominantly trans products with exceptionally high enantioselectivity when the (salen)Ru catalyst shown is used (see scheme).

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