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Directing Group‐Promoted Inert C−O Bond Activation Using Versatile Boronic Acid as a Coupling Agent
Author(s) -
Ambre Ram,
Wang TingHsuan,
Xian Anmei,
Chen YuShiuan,
Liang YuFu,
Jurca Titel,
Zhao Lili,
Ong TiowGan
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202004132
Subject(s) - reagent , chemistry , aryl , boronic acid , functional group , inert , catalysis , reactivity (psychology) , combinatorial chemistry , bond cleavage , coupling reaction , carbene , cleavage (geology) , substrate (aquarium) , organic chemistry , medicinal chemistry , materials science , medicine , alkyl , alternative medicine , pathology , composite material , fracture (geology) , polymer , oceanography , geology
A simple Ni(cod) 2 and carbene mediated strategy facilitates the efficient catalytic cross‐coupling of methoxyarenes with a variety of organoboron reagents. Directing groups facilitate the activation of inert C−O bonds in under‐utilized aryl methyl ethers enabling their adaptation for C−C cross‐coupling reactions as less toxic surrogates to the ubiquitous haloarenes. The method reported enables C−C cross‐coupling with readily available and economical arylboronic acid reagents, which is unprecedented, and compares well with other organoboron reagents with similarly high reactivity. Extension to directing group assisted chemo‐selective C−O bond cleavage, and further application towards the synthesis of novel bifunctionalized biaryls is reported. Key to the success of this protocol is the use of directing groups proximal to the reaction center to facilitate the activation of the inert C−OMe bond.