2-(4-butylphenyl)-5,5-dimethyl-1,3,2-dioxaborinane | 1188303-84-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 2-(4-butylphenyl)-5,5-dimethyl-1,3,2-dioxaborinane
• CAS: 1188303-84-5
• 化学式: C₁₅H₂₃BO₂
• 分子量: 246.157
• InChiKey: BXGZQEYMOVCLCU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  18
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.6
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-(4-butylphenyl)-5,5-dimethyl-1,3,2-dioxaborinane 在 1-fluoro-2,4,6-trimethylpyridinium hexafluorophosphate 、 (tBuCN)2Cu*OTf 、 silver fluoride 作用下， 以 四氢呋喃 为溶剂， 反应 18.0h， 以75%的产率得到1-丁基-4-氟苯
  参考文献：
  名称：

  [EN] FLUORINATION OF ARYL COMPOUNDS
  [FR] FLUORATION DE COMPOSÉS ARYLES

  摘要：

  这项发明提供了一种在含有可被氟原子取代的离去基团的芳基前体中进行氟化的组合物和使用这些组合物的方法。这些组合物包括金属离子源、亲电性氟源、碱和一种化合物，该化合物是芳基氟化物的芳基前体，并且具有可被氟原子取代的离去基团。该发明的示例方法利用这些组合物和方法来制备芳基氟化物。在一个示例实施方式中，亲电性氟源是18F的源。

  公开号：

  WO2014107379A1

文献信息

• A Nickel Catalyst for the Addition of Organoboronate Esters to Ketones and Aldehydes
  作者：Jean Bouffard、Kenichiro Itami

  DOI：10.1021/ol9017613

  日期：2009.10.1

  Ni(cod)2/IPr catalyst promotes the intermolecular 1,2-addition of arylboronate esters to unactivated aldehydes and ketones. Diaryl, alkyl aryl, and dialkyl ketones show good reactivity under mild reaction conditions (≤80 °C, nonpolar solvents, no strong base or acid additives). A dramatic ligand effect favors either carbonyl addition (IPr) or C−OR cross-coupling (PCy3) with aryl ether substrates. A Ni(0)/Ni(II)

  Ni（cod）2 / IPr催化剂可促进芳基硼酸酯的分子间1，2-加成至未活化的醛和酮。二芳基，烷基芳基和二烷基酮在温和的反应条件下（≤80°C，非极性溶剂，无强碱或强酸添加剂）显示出良好的反应活性。显着的配体效应有利于羰基加成（IPr）或与芳基醚底物的C-OR交叉偶联（PCy 3）。提出了由羰基底物的氧化环化引发的Ni（0）/ Ni（II）催化循环。
• Copper-Mediated Fluorination of Arylboronate Esters. Identification of a Copper(III) Fluoride Complex
  作者：Patrick S. Fier、Jingwei Luo、John F. Hartwig

  DOI：10.1021/ja310909q

  日期：2013.2.20

  A method for the direct conversion of arylboronate esters to aryl fluorides under mild conditions with readily available reagents is reported. Tandem reactions have also been developed for the fluorination of arenes and aryl bromides through arylboronate ester intermediates. Mechanistic studies suggest that this fluorination reaction occurs through facile oxidation of Cu(I) to Cu(III), followed by rate-limiting transmetalation of a bound arylboronate to Cu(III). Fast C-F reductive elimination is proposed to occur from an aryl- copper(III)-fluoride complex. Cu(III) intermediates have been generated independently and identified by NMR spectroscopy and ESI-MS.
• Nickel-Catalyzed Suzuki–Miyaura Reaction of Aryl Fluorides
  作者：Mamoru Tobisu、Tian Xu、Toshiaki Shimasaki、Naoto Chatani

  DOI：10.1021/ja207759e

  日期：2011.12.7

  Two protocols for the nickel-catalyzed cross-coupling of aryl fluorides with aryl boronic esters have been developed. The first employs metal fluoride cocatalysts, such as ZrF4 and TiF4, which enable Suzuki-Miyaura reactions of aryl fluorides bearing electron-withdrawing (ketones, esters, and CF3), aryl and alkenyl groups as well as those comprising fused aromatic rings, such as fluoronaphthalenes and fluoroquinolines. The second protocol employs aryl fluorides bearing ortho-directing groups, which facilitate the difficult C-F bond activation process via cyclometalation. N-heterocycles, such as pyridines, quinolines, pyrazoles, and oxazolines, can successfully promote cross-coupling with an array of organoboronic esters. A study into the substituent effects with respect to both coupling components has provided fundamental insights into the mechanism of the nickel-catalyzed cross-coupling of aryl fluorides.