asymmetric catalysis on the intramolecular cyclopropanation of α-diazo-β-keto sulfones

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2003 Cyclopropanation reactions Cyclopropanation reactions O 0138 Asymmetric Catalysis on the Intramolecular Cyclopropanation of α-Diazo-β-keto Sulfones. — A highly stereoselective approach to chiral fused cyclopropanes is devel- oped. This ring system is present in many natural products. — (HONMA, M.; SAWADA, T.; FUJISAWA, Y.; UTSUGI, M.; WATANABE, H.; UMINO, A.; MATSUMURA, T.; HAGIHARA, T.; TAKANO, M.; NAKADA*, M.; J. Am. Chem. Soc. 125 (2003) 10, 2860-2861; Dep. Chem., Sch. Sci. Eng., Waseda Univ., Shinjuku, Tokyo 169, Japan; Eng.) — Jannicke 28- 041

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Page 1: Asymmetric Catalysis on the Intramolecular Cyclopropanation of α-Diazo-β-keto Sulfones

2003 Cyclopropanation reactions

Cyclopropanation reactionsO 0138 Asymmetric Catalysis on the Intramolecular Cyclopropanation of α-Diazo-β-keto

Sulfones. — A highly stereoselective approach to chiral fused cyclopropanes is devel-oped. This ring system is present in many natural products. — (HONMA, M.; SAWADA, T.; FUJISAWA, Y.; UTSUGI, M.; WATANABE, H.; UMINO, A.; MATSUMURA, T.; HAGIHARA, T.; TAKANO, M.; NAKADA*, M.; J. Am. Chem. Soc. 125 (2003) 10, 2860-2861; Dep. Chem., Sch. Sci. Eng., Waseda Univ., Shinjuku, Tokyo 169, Japan; Eng.) — Jannicke

28- 041

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