2,5-二氯吡啶-4-硼酸频哪酯 | 1073353-98-6

• 物质功能分类: 医药中间体 - 杂环化合物 - 吡啶类化合物
• 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: 2,5-二氯吡啶-4-硼酸频哪酯
• 中文别名: 2,5-二氯-4-(4,4,5,5-四甲基-1,3,2-二氧硼烷)-吡啶；2,5-二氯吡啶-4-硼酸频哪酯,95%
• 英文名称: 2,5-dichloro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine
• CAS: 1073353-98-6
• 化学式: C₁₁H₁₄BCl₂NO₂
• mdl: MFCD06798256
• 分子量: 273.955
• InChiKey: ROOZGFDFEKVFDG-UHFFFAOYSA-N

物化性质

• 熔点：
  83-85°C
• 沸点：
  357.6±42.0 °C(Predicted)
• 密度：
  1.24

计算性质

• 辛醇/水分配系数(LogP)：
  4.0
• 重原子数：
  17
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.545
• 拓扑面积：
  31.4
• 氢给体数：
  0
• 氢受体数：
  3

安全信息

• 海关编码：
  2934999090

SDS

Material Safety Data Sheet

---

Section 1. Identification of the substance
2,5-Dichloropyridine-4-boronic acid, pinacol ester
Product Name:
Synonyms:

---

Section 2. Hazards identification
Harmful by inhalation, in contact with skin, and if swallowed.
H315: Causes skin irritation
H319: Causes serious eye irritation
H335: May cause respiratory irritation
P261: Avoid breathing dust/fume/gas/mist/vapours/spray
Wear protective gloves/protective clothing/eye protection/face protection
P280:
P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present
and easy to do – continue rinsing
P304+P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
P405: Store locked up

---

Section 3. Composition/information on ingredients.
2,5-Dichloropyridine-4-boronic acid, pinacol ester
Ingredient name:
CAS number: 1073353-98-6

---

Section 4. First aid measures
Immediately wash skin with copious amounts of water for at least 15 minutes while removing
Skin contact:
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.
Wash out mouth with copious amounts of water for at least 15 minutes. Seek medical attention.
Ingestion:

---

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, under −20◦C.
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
Not specified
Appearance:
Boiling point: No data
Melting point: No data
Flash point: No data
Density: No data
Molecular formula: C11H14BCl2NO2
Molecular weight: 274.0

---

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 chloride.

---

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

• 作为产物：
  描述：

  2,5-二氯吡啶 、 联硼酸频那醇酯 在 (1,5-cyclooctadiene)(methoxy)iridium(I) dimer 、 4,4'-二叔丁基-2,2'-二吡啶 作用下， 以 甲基叔丁基醚 为溶剂， 反应 24.0h， 生成 2,5-二氯吡啶-4-硼酸频哪酯 、 2,5-二氯吡啶-3-硼酸频哪酯
  参考文献：
  名称：

  Iridium-catalyzed C–H borylation of pyridines

  摘要：

  铱催化的C-H硼化是一种有价值且有吸引力的方法，用于制备芳基和杂芳基硼酸酯。然而，这种方法在制备吡啶基及相关氮杂基硼酸酯时可能面临反应活性低和快速质子脱硼化的挑战，尤其是当硼酸酯位于氮杂基氮原子的邻位时。竞争实验揭示，低反应活性是由于氮杂基氮原子的孤对电子在铱的空位上配位，抑制了活性催化剂。通过在C-2位引入取代基可以克服这一效应。此外，当该取代基足够吸电子时，质子脱硼化过程会被足够减缓，从而允许分离和纯化C-6硼酸酯。经过功能化后，导向C-2取代基的还原提供了源自未受阻吡啶环形式邻位硼化的产物。

  DOI：

  10.1039/c4ob01565g

文献信息

• Iridium-catalyzed C–H borylation of pyridines
  作者：Scott A. Sadler、Hazmi Tajuddin、Ibraheem A. I. Mkhalid、Andrei S. Batsanov、David Albesa-Jove、Man Sing Cheung、Aoife C. Maxwell、Lena Shukla、Bryan Roberts、David C. Blakemore、Zhenyang Lin、Todd B. Marder、Patrick G. Steel

  DOI：10.1039/c4ob01565g

  日期：——

  The iridium-catalysed C–H borylation is a valuable and attractive method for the preparation of aryl and heteroaryl boronates. However, application of this methodology for the preparation of pyridyl and related azinyl boronates can be challenged by low reactivity and propensity for rapid protodeborylation, particularly for a boronate ester ortho to the azinyl nitrogen. Competition experiments have revealed that the low reactivity is due to inhibition of the active catalyst through coordination of the azinyl nitrogen lone pair at the vacant site on the iridium. This effect can be overcome through the incorporation of a substituent at C-2. Moreover, when this is sufficiently electron-withdrawing protodeborylation is sufficiently slowed to permit isolation and purification of the C-6 boronate ester. Following functionalization, reduction of the directing C-2 substituent provides the product arising from formal ortho borylation of an unhindered pyridine ring.

  铱催化的C-H硼化是一种有价值且有吸引力的方法，用于制备芳基和杂芳基硼酸酯。然而，这种方法在制备吡啶基及相关氮杂基硼酸酯时可能面临反应活性低和快速质子脱硼化的挑战，尤其是当硼酸酯位于氮杂基氮原子的邻位时。竞争实验揭示，低反应活性是由于氮杂基氮原子的孤对电子在铱的空位上配位，抑制了活性催化剂。通过在C-2位引入取代基可以克服这一效应。此外，当该取代基足够吸电子时，质子脱硼化过程会被足够减缓，从而允许分离和纯化C-6硼酸酯。经过功能化后，导向C-2取代基的还原提供了源自未受阻吡啶环形式邻位硼化的产物。
• Understanding the Activation of Air-Stable Ir(COD)(Phen)Cl Precatalyst for C–H Borylation of Aromatics and Heteroaromatics
  作者：Eric D. Slack、Thomas J. Colacot

  DOI：10.1021/acs.orglett.0c04210

  日期：2021.3.5