Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 143, Issue 34, Pages 13971-13979Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.1c07459
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Funding
- National Natural Science Foundation of China [21931013, 21790362]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]
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Selective functionalization of inactive C(sp(3))-F bonds to prepare medicinally interesting aryldifluoromethylated compounds remains challenging. One promising route is the transition-metal-catalyzed cross-coupling through oxidative addition of the C(sp(3))-F bond in trifluoromethylarenes (ArCF3), which are ideal precursors for this process due to their ready availability and low cost. Here, we report an unprecedented excited-state palladium catalysis strategy for selective defluoroarylation of trifluoromethylarenes with arylboronic acids. This visible-light-induced palladium-catalyzed cross-coupling proceeds under mild reaction conditions and allows transformation of a variety of arylboronic acids and ArCF3. Preliminary mechanistic studies reveal that the oxidative addition of the C(sp(3))-F bond in ArCF3 to excited-state palladium(0) via a single electron transfer pathway is responsible for the C(sp(3))-F bond activation.
Selective functionalization of inactive C(sp(3))-F bonds to prepare medicinally interesting aryldifluoromethylated compounds remains challenging. One promising route is the transition-metal-catalyzed cross-coupling through oxidative addition of the C(sp(3))-F bond in trifluoromethylarenes (ArCF3), which are ideal precursors for this process due to their ready availability and low cost. Here, we report an unprecedented excited-state palladium catalysis strategy for selective defluoroarylation of trifluoromethylarenes with arylboronic acids. This visible-light-induced palladium-catalyzed cross-coupling proceeds under mild reaction conditions and allows transformation of a variety of arylboronic acids and ArCF3. Preliminary mechanistic studies reveal that the oxidative addition of the C(sp(3))-F bond in ArCF3 to excited-state palladium(0) via a single electron transfer pathway is responsible for the C(sp(3))-F bond activation.
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