title: Enantioselective iron-catalyzed intramolecular cyclopropanation reactions.
abstract: An iron-catalyzed asymmetric intramolecular cyclopropanation was realized in high yields and excellent enantioselectivity (up to 97% ee) by using the iron complexes of chiral spiro-bisoxazoline ligands as catalysts. The superiority of iron catalysts exhibited in this reaction demonstrated the potential abilities of this sustainable metal in asymmetric carbenoid transformation reactions.
authors.affiliation: State Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071 (China).
authors.forename: Jun-Jie
authors.initials: JJ
authors.lastname: Shen
authors.forename: Shou-Fei
authors.initials: SF
authors.lastname: Zhu
authors.forename: Yan
authors.initials: Y
authors.lastname: Cai
authors.forename: Huan
authors.initials: H
authors.lastname: Xu
authors.forename: Xiu-Lan
authors.initials: XL
authors.lastname: Xie
authors.forename: Qi-Lin
authors.initials: QL
authors.lastname: Zhou
keywords: asymmetric catalysis; diazo compounds; iron; small ring systems; spiro compounds