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. 2009 Apr 15;131(14):5058-9.
doi: 10.1021/ja9008419.

Directed ortho borylation of functionalized arenes catalyzed by a silica-supported compact phosphine-iridium system

Soichiro Kawamorita  1 , Hirohisa Ohmiya, Kenji Hara, Atsushi Fukuoka, Masaya Sawamura
Affiliations

Directed ortho borylation of functionalized arenes catalyzed by a silica-supported compact phosphine-iridium system

Soichiro Kawamorita et al. J Am Chem Soc. .

Abstract

An immobilized monophosphine-Ir system, which was prepared in situ from [Ir(OMe)(cod)](2) and a silica-supported, compact phosphine, showed high activities and selectivities for the borylation of aromatic C-H bonds with bis(pinacolato)diboron. This system was effective not only for the borylation of benzene but also for the ortho borylation of arenes with directing groups, such as ester, amide, sulfonate, acetal, alkoxymethyl, and chloro groups, under mild reaction conditions.

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