Ruthenium-Catalyzed Para-Selective Oxidative Cross-Coupling of Arenes and Cycloalkanes
作者:Xiangyu Guo、Chao-Jun Li
DOI:10.1021/ol202081c
日期:2011.10.7
A novel, direct para-selective oxidativecross-coupling of benzene derivatives with cycloalkanes catalyzed by ruthenium was developed. A wide range of arenes bearing electron-withdrawing substituents was functionalized directly with simple cycloalkanes with high para-selectivity; arenes with electron-donating groups were mainly para-functionalized. Benzoic acid can be used directly.
“TPG-lite”: A new, simplified “designer” surfactant for general use in synthesis under micellar catalysis conditions in recyclable water
作者:Ruchita R. Thakore、Balaram S. Takale、Yuting Hu、Selene Ramer、Jakub Kostal、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1016/j.tet.2021.132090
日期:2021.5
Using the oxidized, carboxylic acid-containing form of MPEG-750, esterification with racemic vitamin E affords a new surfactant (TPG-lite) that functions as an enabling, nanoreactor-forming amphiphile for use in many types of important reactions in synthesis. The presence of a single ester bond is suggestive of simplified treatment as a component of (eventual) reaction waste water, after recycling
alkylation of aromaticketones with alkanes has been developed using a nickel catalyst with oxamide as the ligand. Acetophenones bearing electron-withdrawing substituents were functionalized directly with simple alkanes with high para-selectivity while acetophenones with electron-donating groups were mainly para-functionalized. A mechanistic study indicated that C-H bond activation of the aromatic ring may
Practical Intermolecular Hydroarylation of Diverse Alkenes via Reductive Heck Coupling
作者:John A. Gurak、Keary M. Engle
DOI:10.1021/acscatal.8b02717
日期:2018.10.5
hydroarylation of alkenes is an attractive approach to construct carbon–carbon (C–C) bonds from abundant and structurally diverse starting materials. Herein we report a palladium-catalyzed reductive Heck hydroarylation of aliphatic and heteroatom-substituted terminal alkenes and select internal alkenes with an array of (hetero)aryl iodides. The reaction is anti-Markovnikov selective with terminal alkenes and tolerates
α‐Amino Radical Halogen Atom Transfer Agents for Metallaphotoredox‐Catalyzed Cross‐Electrophile Couplings of Distinct Organic Halides
作者:Xianhai Tian、Jaspreet Kaur、Shahboz Yakubov、Joshua P. Barham
DOI:10.1002/cssc.202200906
日期:2022.8.5
Cross coupling: A practical dual Ni/photoredox catalyzed cross-electrophile coupling of organic halides by employing readily available α-amino radicals as halogenatom transfer agents is reported. Both coupling partners can be flexibly chosen as limiting reactant to forge 6 different types of C−C bond for a broad scope of applications (>70 examples) including late-stage functionalizations of pharmaceutical
交叉偶联:报道了一种实用的双 Ni/光氧化还原催化的有机卤化物的交叉亲电子偶联,通过使用容易获得的 α-氨基作为卤素原子转移剂。可以灵活选择两种偶联伙伴作为限制反应物,形成 6 种不同类型的 CC 键,用于广泛的应用(>70 示例),包括药物化合物的后期功能化。该反应可以批量和连续流动进行扩展。