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Boryl substitution of functionalized aryl-, heteroaryl- and alkenyl halides with silylborane and an alkoxy base: expanded scope and mechanistic studies

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Title: Boryl substitution of functionalized aryl-, heteroaryl- and alkenyl halides with silylborane and an alkoxy base: expanded scope and mechanistic studies
Authors: Yamamoto, Eiji Browse this author
Ukigai, Satoshi Browse this author
Ito, Hajime Browse this author →KAKEN DB
Issue Date: 1-May-2015
Publisher: The Royal Society of Chemistry
Journal Title: Chemical science
Volume: 6
Issue: 5
Start Page: 2943
End Page: 2951
Publisher DOI: 10.1039/c5sc00384a
Abstract: A transition-metal-free method has been developed for the boryl substitution of functionalized aryl-, heteroaryl- and alkenyl halides with a silylborane in the presence of an alkali-metal alkoxide. The base-mediated boryl substitution of organohalides with a silylborane was recently reported to provide the corresponding borylated products in good to high yields, and exhibit good functional group compatibility and high tolerance to steric hindrance. In this study, the scope of this transformation has been extended significantly to include a wide variety of functionalized aryl-, heteroaryl- and alkenyl halides. In particular, the boryl substitution of (E)- and (Z)-alkenyl halides proceeded smoothly to afford the corresponding alkenyl boronates in good to high yields with retention of the configuration using modified reaction conditions. The results of the mechanistic studies suggest that this boryl substitution proceeds via a carbanion-mediated mechanism.
Rights: https://creativecommons.org/licenses/by/3.0/
Type: article
URI: http://hdl.handle.net/2115/59355
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 伊藤 肇

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