2,6-二氟-3-碘吡啶 | 685517-67-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• 中文名称: 2,6-二氟-3-碘吡啶
• 英文名称: 2,6-difluoro-3-iodopyridine
• CAS: 685517-67-3
• 化学式: C₅H₂F₂IN
• mdl: MFCD09743595
• 分子量: 240.979
• InChiKey: UTWLONSABCGCBR-UHFFFAOYSA-N

物化性质

• 熔点：
  38.0 to 42.0 °C
• 沸点：
  230.1±35.0 °C(Predicted)
• 密度：
  2.129±0.06 g/cm3(Predicted)
• 溶解度：
  溶于甲醇

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  9
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  12.9
• 氢给体数：
  0
• 氢受体数：
  3

安全信息

• 海关编码：
  2933399090
• 危险性防范说明：
  P261,P305+P351+P338
• 危险性描述：
  H302,H315,H319,H335

SDS

Material Safety Data Sheet

---

Section 1. Identification of the substance
Product Name: 2,6-Difluoro-3-iodopyridine
Synonyms:

---

Section 2. Hazards identification
Harmful by inhalation, in contact with skin, and if swallowed.

---

Section 3. Composition/information on ingredients.
Ingredient name: 2,6-Difluoro-3-iodopyridine
CAS number: 685517-67-3

---

Section 4. First aid measures
Skin contact: Immediately wash skin with copious amounts of water for at least 15 minutes while removing
contaminated clothing and shoes. If irritation persists, seek medical attention.
Eye contact: Immediately wash skin with copious amounts of water for at least 15 minutes. Assure adequate
flushing of the eyes by separating the eyelids with fingers. If irritation persists, seek medical
attention.
Inhalation: Remove to fresh air. In severe cases or if symptoms persist, seek medical attention.
Ingestion: Wash out mouth with copious amounts of water for at least 15 minutes. Seek medical attention.

---

Section 5. Fire fighting measures
In the event of a fire involving this material, alone or in combination with other materials, use dry
powder or carbon dioxide extinguishers. Protective clothing and self-contained breathing apparatus
should be worn.

---

Section 6. Accidental release measures
Personal precautions: Wear suitable personal protective equipment which performs satisfactorily and meets local/state/national
standards.
Respiratory precaution: Wear approved mask/respirator
Hand precaution: Wear suitable gloves/gauntlets
Skin protection: Wear suitable protective clothing
Eye protection: Wear suitable eye protection
Methods for cleaning up: Mix with sand or similar inert absorbent material, sweep up and keep in a tightly closed container
for disposal. See section 12.
Environmental precautions: Do not allow material to enter drains or water courses.

---

Section 7. Handling and storage
Handling: This product should be handled only by, or under the close supervision of, those properly qualified
in the handling and use of potentially hazardous chemicals, who should take into account the fire,
health and chemical hazard data given on this sheet.
Store in closed vessels, refrigerated.
Storage:

---

Section 8. Exposure Controls / Personal protection
Engineering Controls: Use only in a chemical fume hood.
Personal protective equipment: Wear laboratory clothing, chemical-resistant gloves and safety goggles.
General hydiene measures: Wash thoroughly after handling. Wash contaminated clothing before reuse.

---

Section 9. Physical and chemical properties
Appearance: Not specified
Boiling point: No data
No data
Melting point:
Flash point: No data
Density: No data
Molecular formula: C5H2F2IN
Molecular weight: 241

---

Section 10. Stability and reactivity
Conditions to avoid: Heat, flames and sparks.
Materials to avoid: Oxidizing agents.
Possible hazardous combustion products: Carbon monoxide, nitrogen oxides, hydrogen fluoride, hydrogen Iodide.

---

Section 11. Toxicological information
No data.

---

Section 12. Ecological information
No data.

---

Section 13. Disposal consideration
Arrange disposal as special waste, by licensed disposal company, in consultation with local waste
disposal authority, in accordance with national and regional regulations.

---

Section 14. Transportation information
Non-harzardous for air and ground transportation.

---

Section 15. Regulatory information
No chemicals in this material are subject to the reporting requirements of SARA Title III, Section
302, or have known CAS numbers that exceed the threshold reporting levels established by SARA
Title III, Section 313.

---

SECTION 16 - ADDITIONAL INFORMATION
N/A

反应信息

• 作为反应物：
  描述：

  2,6-二氟-3-碘吡啶 在 lithium diisopropyl amide 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 1.25h， 生成 2,6-二氟吡啶-3-甲醛
  参考文献：
  名称：

  2,6-二氟吡啶通过有机金属中间体的结构增殖

  摘要：

  与文献声称相反，2,6-二氟吡啶-3-甲醛可以很容易地制备。通过用二异丙基氨基锂和 N,N-二甲基甲酰胺连续处理 2,6-二氟吡啶。进行了亲核试剂从醛中区域选择性置换氟。为了证明有机金属方法的多功能性，大约有两打另外的 2,6-二氟吡啶衍生物。准备好了。应用现代有机金属方法的组合，例如位点选择性氢/金属和卤素/金属置换以及去质子化触发的重卤素迁移。[在 SciFinder (R) 上]

  DOI：

  10.1002/ejoc.200300649
• 作为产物：
  描述：

  2,6-二氟吡啶 在 2,2,6,6-四甲基哌啶 、 正丁基锂 、 二氯(N,N,N',N'-四甲基乙二胺)锌(II) 、 碘 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 2.0h， 以66%的产率得到2,6-二氟-3-碘吡啶
  参考文献：
  名称：

  取代吡啶的原金属化和区域选择性计算的CH酸度关系

  摘要：

  室温下，通过使用从ZnCl 2 ·TMEDA（TMEDA = N，N，N '，N'-四甲基乙二胺）和LiTMP（TMP）获得的混合的锂锌混合物，在四氢呋喃中对一系列甲氧基和氟吡啶进行了脱金属化处理。= 2,2,6,6-四甲基哌啶子酮）的比例为1：3，金属化的物质被碘拦截。从4-甲氧基，2-甲氧基，2-甲氧基，2，6-二甲氧基，2-氟和2，6-二氟吡啶观察到在3位的有效官能化，并且从3-甲氧基和2，3-二甲氧基吡啶观察到在4位的高效官能化。有趣的是，注意到3-氟吡啶（在C2和C4处）和2,6-二氟吡啶（在C3和C5处）有干净的双质子化。 根据底物的CH酸（在气相（DFT B3LYP和G3MP2B3含量）和THF溶液中测定）的CH酸性，已经讨论了所获得的区域选择性。在甲氧基吡啶的情况下，还计算了与LiCl和LiTMP的配合物的p K a值。

  DOI：

  10.1016/j.tet.2016.03.022

文献信息

• Pd ^II ‐Catalyzed Enantioselective C(sp ³ )–H Arylation of Cyclobutyl Ketones Using a Chiral Transient Directing Group
  作者：Li‐Jun Xiao、Kai Hong、Fan Luo、Liang Hu、William R. Ewing、Kap‐Sun Yeung、Jin‐Quan Yu

  DOI：10.1002/anie.202000532

  日期：2020.6.8

  mixture of reactive complexes. We report a PdII‐catalyzed enantioselective β‐C(sp 3)−H arylation reaction of aliphatic ketones using a chiral TDG. A chiral trisubstituted cyclobutane was efficiently synthesized from a mono‐substituted cyclobutane through sequential C−H arylation reactions, thus demonstrating the utility of this method for accessing structurally complex products from simple starting materials

  使用手性瞬态导向基团 (TDG) 是开发 Pd II催化的对映选择性 C(sp 3 )−H 活化反应的一种有前途的方法。然而，这种策略具有挑战性，因为 TDG 上的立体中心通常远离 C−H 键，并且共价连接到底物上的 TDG 和游离 TDG 都能够与 Pd II中心配位，这可能导致混合反应复合物。我们报道了使用手性 TDG 的 Pd II催化的脂肪族酮的对映选择性 β-C( sp 3 )−H 芳基化反应。通过连续的 C-H 芳基化反应，由单取代环丁烷有效合成了手性三取代环丁烷，从而证明了该方法从简单起始原料获得结构复杂产物的实用性。缺电子吡啶酮配体的使用对于观察到的对映选择性至关重要。有趣的是，使用不同的银盐可以逆转对映选择性。
• Ligand‐Enabled β‐Methylene C(sp ³ )−H Arylation of Masked Aliphatic Alcohols
  作者：Guoqin Xia、Zhe Zhuang、Luo‐Yan Liu、Stuart L. Schreiber、Bruno Melillo、Jin‐Quan Yu

  DOI：10.1002/anie.202000632

  日期：2020.5.11

  salicylic-aldehyde-derived L,X-type directing group with an electron-deficient 2-pyridone ligand to enable the β-methylene C(sp3 )-H arylation of aliphatic alcohols, which has not been possible previously. Notably, this protocol is compatible with heterocycles embedded in both alcohol substrates and aryl coupling partners. A site- and stereo-specific annulation of dihydrocholesterol and the synthesis of a key

  尽管有最新进展，但是反应性和位点选择性仍然是C（sp3）-H键官能化方法实际应用的重大障碍。在这里，我们描述了一个系统，该系统将水杨醛衍生的L，X型导向基团与缺电子的2-吡啶酮配体结合在一起，以使脂肪族醇的β-亚甲基C（sp3）-H芳基化以前有可能。值得注意的是，该方案与嵌入在醇底物和芳基偶联伙伴中的杂环兼容。二氢胆固醇的位点和立体特异性环合以及恩格列酮的关键中间体的合成说明了该方法的实用性。
• Pyridine derivatives in liquid crystalline medium useful for
  申请人：Merck Patent Gesellschaft mit beschrankter Haftung

  公开号：US05204477A1

  公开（公告）日：1993-04-20

  The invention relates to pyridine derivatives of the formula I ##STR1## wherein R.sup.1, A, Z, r, X, s and R.sup.2 have the meaning given in claim 1, and their use as components for liquid crystal media for electrooptical display elements based on the ECB effect.

  该发明涉及具有以下式I的吡啶衍生物 其中R.sup.1、A、Z、r、X、s和R.sup.2的含义如权利要求1所述，并且它们作为基于ECB效应的电光显示元件的液晶介质组分的用途。
• Deprotometalation of substituted pyridines and regioselectivity-computed CH acidity relationships
  作者：Madani Hedidi、Ghenia Bentabed-Ababsa、Aïcha Derdour、Yury S. Halauko、Oleg A. Ivashkevich、Vadim E. Matulis、Floris Chevallier、Thierry Roisnel、Vincent Dorcet、Florence Mongin

  DOI：10.1016/j.tet.2016.03.022

  日期：2016.4

  Interestingly, clean dideprotonation was noted from 3-fluoropyridine (at C2 and C4) and 2,6-difluoropyridine (at C3 and C5). The obtained regioselectivities have been discussed in light of the CH acidities of the substrates, determined both in the gas phase (DFT B3LYP and G3MP2B3 levels) and in THF solution. In the case of methoxypyridines, the pKa values have also been calculated for complexes with

  室温下，通过使用从ZnCl 2 ·TMEDA（TMEDA = N，N，N '，N'-四甲基乙二胺）和LiTMP（TMP）获得的混合的锂锌混合物，在四氢呋喃中对一系列甲氧基和氟吡啶进行了脱金属化处理。= 2,2,6,6-四甲基哌啶子酮）的比例为1：3，金属化的物质被碘拦截。从4-甲氧基，2-甲氧基，2-甲氧基，2，6-二甲氧基，2-氟和2，6-二氟吡啶观察到在3位的有效官能化，并且从3-甲氧基和2，3-二甲氧基吡啶观察到在4位的高效官能化。有趣的是，注意到3-氟吡啶（在C2和C4处）和2,6-二氟吡啶（在C3和C5处）有干净的双质子化。 根据底物的CH酸（在气相（DFT B3LYP和G3MP2B3含量）和THF溶液中测定）的CH酸性，已经讨论了所获得的区域选择性。在甲氧基吡啶的情况下，还计算了与LiCl和LiTMP的配合物的p K a值。
• Facile preparation of 3-substituted-2,6-difluoropyridines: application to the synthesis of 2,3,6-trisubstituted pyridines
  作者：Taisuke Katoh、Yoshihide Tomata、Tetsuya Tsukamoto、Yoshihisa Nakada

  DOI：10.1016/j.tetlet.2015.09.057

  日期：2015.10

  We report a facile method for the difluorination of 3-substituted-2,6-dichloropyridines using cesium fluoride as a fluorination reagent in dimethyl sulfoxide. It is proposed that this method for preparing 3-substituted-2,6-difluoropyridines is simpler and easier than those reported in previous literature. To examine the utility of 3-substituted-2,6-difluoropyridines in synthetic chemistry, we also

  我们报告了一种简便的方法，使用氟化铯作为二甲基亚砜中的氟化试剂，对3-取代的2,6-二氯吡啶进行二氟化。提出这种制备3-取代的2，6-二氟吡啶的方法比以前文献中报道的方法更简单，更容易。为了检查3-取代的2,6-二氟吡啶在合成化学中的效用，我们还证明了随后通过串联亲核性芳族取代转化为2,3,6-三取代的吡啶。