4-(2-fluoroacetyl)benzonitrile | 1046785-07-2

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 4-(2-fluoroacetyl)benzonitrile
• CAS: 1046785-07-2
• 化学式: C₉H₆FNO
• 分子量: 163.151
• InChiKey: IPNRDIRJIJRJIV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  12
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.11
• 拓扑面积：
  40.9
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  4-(2-fluoroacetyl)benzonitrile 在 titanium(IV) isopropylate 、 氨 作用下， 以 乙醇 为溶剂， 反应 24.0h， 生成
  参考文献：
  名称：

  对映体富集的1-芳基-2-氟乙胺。高效脂肪酶催化的拆分和对Mitsunobu转化方案的限制

  摘要：

  八个1-芳基-2-氟乙胺的两种对映体均以1-芳基-2-氟乙酮为原料合成。使用南极假丝酵母的脂肪酶B和甲氧基乙酸乙酯作为酰基供体对胺进行动力学拆分，得到96.99％ee的（R）-胺和> 99.5％ee的（S）-甲氧基乙酰胺。关于反应温度，酰基给体浓度，水活度和底物结构的变化，分离度很强。其他九种脂肪酶制剂未能催化该反应或对映选择性低。其次，在合成（（S）时，采用以苯二甲酰亚胺为亲核试剂的对映体富集的1-芳基-2-氟乙醇为原料的Mitsunobu转化方案。）-1-芳基-2-氟乙胺。转化效率和产率均取决于芳族取代基。对于六种底物，观察到立体化学的完全反转。但是，当芳族环上存在供电子性取代基时，外消旋化和低收率是结果。当用氰基或硝基取代时，会发生意想不到的氟消除，从而限制了这些转化的收率。使用圆二色性确定1-芳基-2-氟乙胺的绝对构型。

  DOI：

  10.1016/j.tet.2010.06.081
• 作为产物：
  描述：

  2-溴-4'-氰基苯乙酮 在 potassium fluoride 、 2C₁₆H₃₆N⁽¹⁺⁾*C₂H₄O₆S₂^(2-) 作用下， 以 水 、 叔丁醇 为溶剂， 反应 4.0h， 以35%的产率得到4-(2-fluoroacetyl)benzonitrile
  参考文献：
  名称：

  使用氟化钾进行不平衡离子对催化的亲核氟化

  摘要：

  不平衡的离子对促进剂（例如，四丁基硫酸铵）由大体积的电荷离域阳离子和小电荷局部阴离子组成，使用易于处理的 KF 极大地加速了亲核氟化。我们还成功地将廉价且市售的离子交换树脂转化为聚合物负载的离子对促进剂 (A26–SO 4 2– )，过滤后可重复使用。此外，A26–SO 4 2–可用于连续流动条件。在我们的条件下，水的耐受性良好。

  DOI：

  10.1021/acs.orglett.1c03887

文献信息

• Microwave assisted fluorination: an improved method for side chain fluorination of substituted 1-arylethanones
  作者：Thor Håkon Krane Thvedt、Erik Fuglseth、Eirik Sundby、Bård Helge Hoff

  DOI：10.1016/j.tet.2009.09.070

  日期：2009.11

  microwave (MW) assisted fluorination of 1-arylethanones to their corresponding 1-aryl-2-fluoroethanones has been developed. The first step utilises Selectfluor™ as a fluorinating agent in methanol forming 1-aryl-2-fluoroethanones and their corresponding dimethyl acetals. In the second step, water is added and Selectfluor™ acts as a Lewis acid in the hydrolytic cleavage of the dimethyl acetals. Compared to

  已经开发了一种两步一锅微波（MW）辅助将1-蒽酮氟化为相应的1-芳基-2-氟乙酮的方法。第一步利用Selectfluor™作为甲醇中的氟化剂，形成1-芳基-2-氟乙酮及其相应的二甲基乙缩醛。在第二步中，添加水，并且Selectfluor™在二甲基乙缩醛的水解裂解中充当路易斯酸。与热合成相比，MW辅助方法可减少氟化反应和二甲基乙缩醛反应的反应时间。而且，一锅法减少了试剂和溶剂的消耗。该方法最适合于制备含有可钝化亲电芳族取代基的取代基的1-芳基-2-氟乙酮，但高度缺电子的酮如1-（3，5-二硝基苯基）乙酮反应更慢。使用富含电子的芳族酮进行的反应具有较低的区域选择性，并且还产生了氟代芳族产物。
• Fluoro‐Substituted Methyllithium Chemistry: External Quenching Method Using Flow Microreactors
  作者：Marco Colella、Arianna Tota、Yusuke Takahashi、Ryosuke Higuma、Susumu Ishikawa、Leonardo Degennaro、Renzo Luisi、Aiichiro Nagaki

  DOI：10.1002/anie.202003831

  日期：2020.6.26

  The external quenching method based on flow microreactors allows the generation and use of short‐lived fluoro‐substituted methyllithium reagents, such as fluoromethyllithium, fluoroiodomethyllithium, and fluoroiodostannylmethyllithium. Highly chemoselective reactions have been developed, opening new opportunities in the synthesis of fluorinated molecules using fluorinated organometallics.

  基于流动微反应器的外部淬灭方法允许生成和使用寿命短的氟取代的甲基锂试剂，例如氟甲基锂，氟碘甲基锂和氟碘锡烷基甲基锂。已经开发出高度的化学选择性反应，为使用氟化有机金属化合物合成氟化分子开辟了新的机会。
• Electrophilic and nucleophilic side chain fluorination of para-substituted acetophenones
  作者：Erik Fuglseth、Thor Håkon Krane Thvedt、Maria Førde Møll、Bård Helge Hoff

  DOI：10.1016/j.tet.2008.05.060

  日期：2008.7

  para-Substituted alpha-fluoroacetophenones have been synthesised by three different routes. Electrophilic fluorination of trimethylsilyl enol ethers of acetophenones using Selectfluor (F-TEDA-BF4, 1-chloromethyl-4-fluoro- 1,4-diazoniabicyclo[ 2.2.2]octane bis-(tetrafluoroborate)) gave high to moderate yield depending on the electronic properties of the substituents. F-TEDA-BF4 mediated fluorination of acetophenones in methanol resulted in a mixture of alpha-fluoroacetophenones and the corresponding 2-fluoro- 1,1 -dimethyl acetals. The dimethyl acetals were hydrolysed using trifluoroacetic acid in water to maximise the yield of the product. Nucleophilic fluorination of alpha-bromoacetophenones using tetrabutylammoniurn hydrogen bifluoride (TBABF) led to moderate yield when having electron-donating substituents, whereas low yields were experienced when more electron-withdrawing substituents were introduced. (c) 2008 Elsevier Ltd. All rights reserved.
• Asymmetric reduction using (R)-MeCBS and determination of absolute configuration of para-substituted 2-fluoroarylethanols
  作者：Erik Fuglseth、Eirik Sundby、Per Bruheim、Bård Helge Hoff

  DOI：10.1016/j.tetasy.2008.07.019

  日期：2008.8

  The asymmetric reduction of eight alpha-fluoroacetophenones has been investigated using (R)-MeCBS as a catalyst in various media. Based on a solvent screen, 1,2-dimethoxyethane, diethyl ether and dichloromethane were used in reductions of the alpha-fluoroacetophenones. The enantiomeric excess of the products depended oil the solvent and the electronic character of the aromatic substituents. Higher enantioselectivity and less solvent dependency were observed in the reduction of substrates bearing electron donating substituents, whereas the opposite was the case for reduction of the substrates with electron withdrawing substituents. The (R)-2-fluoro-1-arylethanols were obtained with enantiomeric excesses in the range of 91-99% using 1,2-dimethoxyethane as a solvent. Six of the alcohols produced are new chemical entities. The absolute configurations of the (R)-2-fluoro-1-arylethanols were determined by circular dichroism using the exciton chirality method of tile (S)-benzoate esters of the alcohols. The (S)-benzoate esters were obtained by lipase-catalysed resolution using Novozym 435. (C) 2008 Elsevier Ltd. All Fights reserved.
• Ruthenium-catalysed asymmetric transfer hydrogenation of para-substituted α-fluoroacetophenones
  作者：Erik Fuglseth、Eirik Sundby、Bård H. Hoff

  DOI：10.1016/j.jfluchem.2009.03.011

  日期：2009.6

  The first examples of asymmetric transfer hydrogenation of alpha-fluoroacetophenones are reported. Eight para-substituted a-fluoroacetophenones have been reduced using four catalytic systems constructed of [RuCl2(p-cymene)(2)](2) or [RuCl2(mesitylene)(2)](2) in combinations with each of the ligands (1R,2R)-N-(p-toluenesulfonyl)-1,2-diphenylethylenediamine ((R,R)-TsDPEN) and (1R,2R)-N-(p-toluenesulfonyl)-1,2cyclohexanediamine ((R,R)-TsCYDN). All reactions were performed in both water and formic acid/triethylamine. The highest enantioselectivity was obtained using the (R,R)-TsDPEN ligand in a formic acid/triethylamine mixture, giving the (S)-1-aryl-2-fluoroethanols in high to moderate enantiomeric excess (97.5-84.5%). For this solvent system the presence of electron withdrawing groups in the para position reduced the enantioselectivity. Reactions performed in water generally gave lower enantioselectivity and reaction rate, although RuCl(mesitylene)-(R,R)-TsDPEN yielded the product alcohols with enantiomeric excess in the range of 95.5-76.5%. (c) 2009 Elsevier B.V. All rights reserved.