NHC-Iridium-Catalyzed Deoxygenative Coupling of Primary Alcohols Producing Alkanes Directly: Synergistic Hydrogenation with Sodium Formate Generated in Situ
作者:Zeye Lu、Qingshu Zheng、Siqi Yang、Chun Qian、Yajing Shen、Tao Tu
DOI:10.1021/acscatal.1c02700
日期:2021.9.3
The direct conversion of alcohols into long-chain alkanes is an attractive but extremely challenging approach for biomass upgrading. Here, we describe the highly selective deoxygenative coupling of aryl ethanols with primary alcohols to produce alkanes, using a bis-N-heterocyclic carbene iridium (bis-NHC-Ir) complex as the catalyst. Up to quantitative yields and selectivity with a broad substrate scope
Pd‐Catalyzed Cross‐Coupling of Alkylzirconocenes and Aryl Chlorides
作者:Binyang Jiang、Shi‐Liang Shi
DOI:10.1002/cjoc.202200132
日期:2022.8
perspective yet rarely exploited partners in transition-metal catalyzed cross-coupling reaction. The notoriously low nucleophilicity of alkylzirconocenes and the potential β-H elimination restrict their application in cross-coupling. Herein, we report the first Pd-catalyzed aryl-alkyl cross-coupling of alkylzirconocenes and aryl halides. A commercially available N-heterocyclic carbene (IPr) as the ligand
Mechanochemically Generated Calcium‐Based Heavy Grignard Reagents and Their Application to Carbon–Carbon Bond‐Forming Reactions
作者:Pan Gao、Julong Jiang、Satoshi Maeda、Koji Kubota、Hajime Ito
DOI:10.1002/anie.202207118
日期:2022.10.10
technique, we have achieved for the first time the generation of calcium-based heavy Grignardreagents (Ar−CaX) from commercially available, unactivated calcium metal without applying any pre-activation process. Our operationally simple protocol enables the rapid development of novel cross-electrophile-coupling reactions mediated by arylcalcium nucleophiles under mechanochemical conditions.