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Transition-metal-carbene-like intermolecular insertion of a borylene into C-H bonds. 2020

Siyuan Liu, and Marc-André Légaré, and Alexander Hofmann, and Theresa Dellermann, and Holger Braunschweig
School of Materials Science and Engineering, China University of Petroleum, Qingdao, Shandong, 266580, P. R. China and Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. h.braunschweig@uni-wuerzburg.de and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.

We demonstrate that, in analogy to transition-metal carbene chemistry, [(OC)5Mo[double bond, length as m-dash]BN(SiMe3)2] facilitates intermolecular transfer of the borylene [:BN(SiMe3)2], which ultimately undergoes insertion into C-H bonds under very mild conditions. The one-pot multiple functionalization of the cyclopentadienyl rings of tungstenocene dihydride is demonstrated using this approach.

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