This study described palladium-catalyzed chemoselective direct α-arylation of carbonyl compounds with chloroaryl triflates in the Ar-Cl bond. The Pd/SelectPhos system showed excellent chemoselectivity toward the Ar-Cl bond in the presence of the Ar-OTf bond with a broad substrate scope and excellent product yields. The electronic and steric hindrance offered by the -PR group of the ligand with the C2-alkyl group was found to be the key factor affecting the reactivity and chemoselectivity of the α-arylation reaction. The chemodivergent approach was also successfully employed in the synthesis of flurbiprofen and its derivatives (, -OMe and -F).
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| http://dx.doi.org/10.1039/d1sc06701j | DOI Listing |
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