2,4-Dimethoxy-3,5,6-trifluoronitrobenzene | 3480-60-2

• 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-Dimethoxy-3,5,6-trifluoronitrobenzene
• 英文别名: 1,2,4-Trifluoro-3,5-dimethoxy-6-nitrobenzene
• CAS: 3480-60-2
• 化学式: C₈H₆F₃NO₄
• 分子量: 237.135
• InChiKey: JXYVGZRSMZBZRU-UHFFFAOYSA-N

物化性质

• 沸点：
  328.8±37.0 °C(Predicted)
• 密度：
  1.464±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2
• 重原子数：
  16
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  64.3
• 氢给体数：
  0
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  2,4-Dimethoxy-3,5,6-trifluoronitrobenzene 在 palladium on activated charcoal 盐酸 、 氢气 、 亚膦酸 、 sodium nitrite 作用下， 以 乙醇 、 乙酸乙酯 为溶剂， 4.0~20.0 ℃ 、275.79 kPa 条件下， 反应 2.25h， 生成 1,3-dimethoxy-2,4,5-trifluorbenzene
  参考文献：
  名称：

  Synthesis of Fluorinated Fluoresceins

  摘要：

  Several novel fluorinated fluoresceins (Oregon Green dyes) were prepared by the reaction of fluororesorcinols with phthalic anhydride and its derivatives. A novel regiospecific synthesis of fluororesorcinols was key to the successful synthesis of these new fluorophores. (Polyfluoro)-nitrobenzenes were reacted with 2 equiv of sodium methoxide followed by reduction, hydrodediazoniation, and demethylation, giving the first straightforward synthesis of 2-fluororesorcinol, 4-fluororesorcinol, 2,4-difluororesorcinol, and 2,4,5-trifluororesorcinol. These fluorinated fluoresceins have higher photostability and ionize at a lower pH (pK(a) = 3.3-6.1) than fluorescein (pK(a) = 6.5). Some of the fluorinated fluoresceins have very high quantum yields (0.85-0.97), which, in combination with their lower pK(a)s and high photostability, makes them superior fluorescent dyes for use as reporter molecules in biological systems.

  DOI：

  10.1021/jo9706178
• 作为产物：
  描述：

  五氟硝基苯 、 sodium methylate 以 甲醇 为溶剂， 以98%的产率得到2,4-Dimethoxy-3,5,6-trifluoronitrobenzene
  参考文献：
  名称：

  Synthesis of Fluorinated Fluoresceins

  摘要：

  Several novel fluorinated fluoresceins (Oregon Green dyes) were prepared by the reaction of fluororesorcinols with phthalic anhydride and its derivatives. A novel regiospecific synthesis of fluororesorcinols was key to the successful synthesis of these new fluorophores. (Polyfluoro)-nitrobenzenes were reacted with 2 equiv of sodium methoxide followed by reduction, hydrodediazoniation, and demethylation, giving the first straightforward synthesis of 2-fluororesorcinol, 4-fluororesorcinol, 2,4-difluororesorcinol, and 2,4,5-trifluororesorcinol. These fluorinated fluoresceins have higher photostability and ionize at a lower pH (pK(a) = 3.3-6.1) than fluorescein (pK(a) = 6.5). Some of the fluorinated fluoresceins have very high quantum yields (0.85-0.97), which, in combination with their lower pK(a)s and high photostability, makes them superior fluorescent dyes for use as reporter molecules in biological systems.

  DOI：

  10.1021/jo9706178

文献信息

• Fluorinated xanthene derivatives
  申请人：Molecular Probes, Inc.

  公开号：US06162931A1

  公开（公告）日：2000-12-19

  The family of dyes of the invention are fluoresceins and rhodols that are directly substituted on one or more aromatic carbons by fluorine. These fluorine-substituted fluorescent dyes possess greater photostability and have lower sensitivity to pH changes in the physiological range of 6-8 than do non-fluorinated dyes, exhibit less quenching when conjugated to a substance, and possess additional advantages. The dyes of the invention are useful as detectable tracers and for preparing conjugates of organic and inorganic substances.

  该发明的染料家族是直接在一个或多个芳香碳上被氟取代的荧光素和罗丹素。这些氟取代的荧光染料具有更高的光稳定性，在生理范围为6-8的pH变化下比非氟化染料具有较低的敏感性，当与物质结合时表现出较少的猝灭，并具有额外的优势。该发明的染料可用作可检测的示踪剂，并用于制备有机和无机物质的共轭物。
• Constructing a Catalytic Cycle for C–F to C–X (X = O, S, N) Bond Transformation Based on Gold-Mediated Ligand Nucleophilic Attack
  作者：Ji-Yun Hu、Jing Zhang、Gao-Xiang Wang、Hao-Ling Sun、Jun-Long Zhang

  DOI：10.1021/acs.inorgchem.5b02634

  日期：2016.3.7

  replacement of Cl by a more nucleophilic tBuO anion ligand, showed higher reactivity and para selectivity in the transformation of C–F to C–OtBu bond, distinctively different from that when only KOtBu was used (ortho selectivity) under the identical condition. Mechanistic studies including density functional theory calculations suggested a gold-mediated nucleophilic ligand attack of the C–F bond pathway

  三配位氯化金（I）络合物tBuXantphosAuCl，由空间庞大的9,9-二甲基-4,5-双（二叔丁基）支撑合成了丁基丁基膦基）的蒽酮配体（tBuXantphos）。该络合物的特征是与双配位线性金络合物（2.27–2.30Å）和三配位XantphosAuCl [2.462（1）Å]相比，Au–Cl键长[2.632（1）Å]长得多。tBuXantphosAuCl和五氟硝基苯（PFNB）的共晶体的单晶X射线衍射分析和紫外可见分光光度法滴定实验表明，Cl阴离子配体与PFNB之间存在阴离子-π相互作用。PFNB与tBuXantphosAuOtBu之间的化学计量反应在被更具亲核性的tBuO阴离子配体取代Cl后，在C–F向C–OtBu键的转化中表现出更高的反应性和对位选择性，这与仅使用KOtBu时显着不同（邻位选择性） ）在相同的条件下。N Ar工艺。根据这些结果，使用三甲基甲硅烷基衍生物TMS-X（X
• Aromatic polyfluoro compounds—XXXVI
  作者：J. Burdon、D.R. King、J.C. Tatlow

  DOI：10.1016/0040-4020(67)85087-7

  日期：1967.1

  Four tetrafluoronitrobenzene derivatives substituted in the 2-position (2-XC6F4NO2: X  NH2, NHMe, NMe2 and OMe) have each been treated with four nucleophiles (Y = ammonia, methylamine, dimethylamine and sodim methoxide) to give mixtures of 2X-4Y- and 2X-6Y-trifluoronitrobenzenes. Possible reasons for the variation of the ratios of these two products are discussed.

  在2位上取代的4种四氟硝基苯衍生物（2-XC 6 F 4 NO 2：X = NH 2，NHMe，NMe 2和OMe）已分别用4个亲核试剂处理（Y =氨，甲胺，二甲胺和甲醇碱）得到2X-4Y-和2X-6Y-三氟硝基苯的混合物。讨论了这两种产品的比率变化的可能原因。
• US6162931A
  申请人：——

  公开号：US6162931A

  公开（公告）日：2000-12-19
• US6229055B1
  申请人：——

  公开号：US6229055B1

  公开（公告）日：2001-05-08