title: Phosphinite-iminopyridine iron catalysts for chemoselective alkene hydrosilylation.
abstract: A series of new pincer iron complexes with electron-donating phosphinite-iminopyridine (PNN) ligands has been prepared and characterized. These iron compounds are efficient and selective catalysts for the anti-Markovnikov alkene hydrosilylation of primary, secondary, and tertiary silanes. More importantly, the system exhibits unprecedented functional group tolerance with reactive groups such as ketones, esters, and amides. Furthermore, the iron-catalyzed alkene hydrosilylation was successfully applied to the synthesis of a valuable insecticide, silafluofen. The electronic properties and structures of the iron complexes have been studied by spectroscopies and computational methods. Overall, the iron catalysts may provide a low-cost and environmentally benign alternative to currently employed precious metal systems for alkene hydrosilylation.
authors.affiliation: State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Science , 345 Lingling Road, Shanghai 200032, P.R. China.
authors.forename: Dongjie
authors.initials: D
authors.lastname: Peng
authors.forename: Yanlu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Du
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Xuebing
authors.initials: X
authors.lastname: Leng
authors.forename: Marc D
authors.initials: MD
authors.lastname: Walter
authors.forename: Zheng
authors.initials: Z
authors.lastname: Huang