Self-Assembly of Fluorinated Boronic Esters and 4,4′-Bipyridine into 2:1 N→B Adducts and Inclusion of Aromatic Guest Molecules in the Solid State: Application for the Separation of <i>o</i>,<i>m</i>,<i>p</i>-Xylene
作者:Gonzalo Campillo-Alvarado、Eva C. Vargas-Olvera、Herbert Höpfl、Angel D. Herrera-España、Obdulia Sánchez-Guadarrama、Hugo Morales-Rojas、Leonard R. MacGillivray、Braulio Rodríguez-Molina、Norberto Farfán
DOI:10.1021/acs.cgd.7b01368
日期:2018.5.2
A series of 2:1 fluorinated arylboronicester adducts with 4,4′-bipyridine sustained by N→B dative bonds have been synthesized. The degree of fluorination in the arylboronicesters derived from catechol is shown to modulate the molecular conformation of the coordinated boronic ester moieties and the intermolecular interactions by means of C–H···F and F···F contacts that sustain the crystal lattices
A series of 2:1 fluorinated arylboronic ester adducts with 4,4′-bipyridine sustained by N→B dative bonds have been synthesized. The degree of fluorination in the arylboronic esters derived from catechol is shown to modulate the molecular conformation of the coordinated boronic ester moieties and the intermolecular interactions by means of C–H···F and F···F contacts that sustain the crystal lattices
Mechanism and Scope of Nickel-Catalyzed Decarbonylative Borylation of Carboxylic Acid Fluorides
作者:Christian A. Malapit、James R. Bour、Simon R. Laursen、Melanie S. Sanford
DOI:10.1021/jacs.9b08961
日期:2019.10.30
Article describes the development of a base-free, nickel-catalyzeddecarbonylative coupling of carboxylic acid fluorides with diboron reagents to selectively afford aryl boronate ester products. Detailed studies were conducted to assess the relative rates of direct transmetalation between aryl boronate esters and diboron reagents and a bisphosphine nickel(aryl)(fluoride) intermediate. These investigations
A metal‐free radical borylation of alkyl and aryl iodides with bis(catecholato)diboron (B2cat2) as the boron source under mild conditions is introduced. The borylation reaction is operationally easy to conduct and shows high functional group tolerance and broad substrate scope. Radical clock experiments and density functional theory calculations provide insights into the mechanism and rate constants
介绍了在温和条件下以双(儿茶酚)二硼(B 2 cat 2 )作为硼源对烷基碘化物和芳基碘化物进行金属自由基硼化反应。硼化反应操作简便,具有较高的官能团耐受性和广泛的底物范围。自由基时钟实验和密度泛函理论计算提供了对 B 2 cat 2的 C 自由基硼化的机制和速率常数的见解。
Distinguishing Between Pathways for Transmetalation in Suzuki−Miyaura Reactions
作者:Brad P. Carrow、John F. Hartwig
DOI:10.1021/ja1108326
日期:2011.2.23
process and the observed rate constants for the stoichiometric reactions between the two classes of reaction components, we conclude that the reaction of a palladium hydroxo complex with boronic acid, not the reaction of a palladium halide complex with trihydroxyborate, accounts for transmetalation in catalytic Suzuki-Miyaura reactions conducted with weak base and aqueous solvent mixtures.
A General Strategy for the Perfluoroalkylation of Arenes and Arylbromides by Using Arylboronate Esters and [(phen)CuRF]
作者:Nichole D. Litvinas、Patrick S. Fier、John F. Hartwig
DOI:10.1002/anie.201106668
日期:2012.1.9
method for the synthesis of aryl perfluoroalkanes from arenes and aryl bromides is described. Substituted arenes or aryl bromides are converted in situ to an aryl boronate ester that readily undergoes perfluoroalkylation in air with [(phen)CuRF]. A broad range of aryl bromide substrates were perfluoroalkylated in good yield for the first time. [(phen)CuCF3] is now commercially available and has been prepared
描述了一种从芳烃和芳基溴化物合成芳基全氟烷烃的通用方法。取代的芳烃或芳基溴化物在原位转化为芳基硼酸酯,该芳基硼酸酯易于在空气中与 [(phen)CuR F ]进行全氟烷基化。广泛的芳基溴底物首次以良好的产率全氟烷基化。[(phen)CuCF 3 ] 现在可商购并已以 20 g 的规模制备。