Cut to the chase: A ruthenium complex derived from 1‐adamantyl carboxylate (1‐AdCO2−) enabled highly regioselective intermolecular directalkylation of arenes with unactivated primary and secondary alkyl halides bearing β‐hydrogen atoms (see scheme; NMP=N‐methylpyrrolidinone).
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‐Selective C−H Activation of Arenes at Room Temperature Using Visible Light: Dual‐Function Ruthenium Catalysis
作者:Arunachalam Sagadevan、Michael F. Greaney
DOI:10.1002/anie.201904288
日期:2019.7.15
Ruthenium‐catalyzedmeta‐C−H activation of arenes at roomtemperature is reported to proceed under blue‐light irradiation. A variety of heteroarenes are compatible with this photochemical process, which leads to the corresponding meta C−C coupling products in good to very good yields. Initial mechanistic studies suggest a single‐electron transfer process occurs between a photoexcited RuII‐cyclometalated
Cobalt-Catalyzed Chelation-Assisted Alkylation of Arenes with Primary and Secondary Alkyl Halides
作者:Naohiko Yoshikai、Ke Gao、Takeshi Yamakawa
DOI:10.1055/s-0033-1338658
日期:——
center to the alkylhalide to form the corresponding alkyl radical, which has a finite lifetime before it undergoes C–C bond formation. Cobalt–N-heterocyclic carbene catalytic systems have been developed for chelation-assisted ortho-alkylation of aromatic compounds with alkylhalides. Aryl imines can be selectively monoalkylated at room temperature by various primary or secondary alkyl chlorides or