2-溴-6-甲基-3-硝基吡啶 | 374633-31-5

• 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1,3-偶极化合物 - 烯丙基型1,3-偶极有机化合物
• 中文名称: 2-溴-6-甲基-3-硝基吡啶
• 中文别名: 2-溴-3-硝基-6-甲基吡啶
• 英文名称: 2-bromo-6-methyl-3-nitropyridine
• CAS: 374633-31-5
• 化学式: C₆H₅BrN₂O₂
• mdl: MFCD03095212
• 分子量: 217.022
• InChiKey: IHHLJCDGOSZFTB-UHFFFAOYSA-N

物化性质

• 沸点：
  265.2±35.0 °C(Predicted)
• 密度：
  1.709±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  11
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.166
• 拓扑面积：
  58.7
• 氢给体数：
  0
• 氢受体数：
  3

安全信息

• 危险等级：
  IRRITANT
• 海关编码：
  2933399090
• 储存条件：
  室温

SDS

Material Safety Data Sheet

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Section 1. Identification of the substance
Product Name: 2-Bromo-6-methyl-3-nitropyridine
Synonyms:

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

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Section 3. Composition/information on ingredients.
Ingredient name: 2-Bromo-6-methyl-3-nitropyridine
CAS number: 374633-31-5

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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.

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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.

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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.

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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.
Storage:

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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.

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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: C6H5BrN2O2
Molecular weight: 217

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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 bromide.

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Section 11. Toxicological information
No data.

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Section 12. Ecological information
No data.

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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.

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

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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.

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SECTION 16 - ADDITIONAL INFORMATION
N/A

反应信息

• 作为反应物：
  描述：

  2-溴-6-甲基-3-硝基吡啶 、 N-乙酰苯胺 在 2,5-dimethyl-3-phenyl-3H-imidazo[4,5-b]pyridine 作用下， 以to yield the title compound as brown viscous oil (57 mg, 51%)的产率得到2,5-dimethyl-3-phenyl-3H-imidazo[4,5-b]pyridine
  参考文献：
  名称：

  Regioselective copper catalyzed synthesis of benzimidazoles and azabenzimidazoles

  摘要：

  本发明涉及一种配合物I的区域选择性合成方法，其中R0; R1; R2; R3; R4; R5; A1; A2; A3; A4，Q和J具有声明中指示的含义。本发明提供了一种直接铜催化的区域选择性方法，可从2-卤代硝基芳烃和N-取代酰胺出发，合成广泛的非对称、多功能N-取代苯并咪唑或氮杂苯并咪唑配合物I。

  公开号：

  US20100261909A1
• 作为产物：
  描述：

  2-羟基-3-硝基-6-甲基吡啶 在 溴 、 三溴化磷 作用下， 生成 2-溴-6-甲基-3-硝基吡啶 、 2,5-dibromo-6-methyl-3-nitropyridine
  参考文献：
  名称：

  Bromination Products of Nitropyridine

  摘要：

  DOI：

  10.1021/ja01627a078

文献信息

• N₂Phos – an easily made, highly effective ligand designed for ppm level Pd-catalyzed Suzuki–Miyaura cross couplings in water
  作者：Nnamdi Akporji、Ruchita R. Thakore、Margery Cortes-Clerget、Joel Andersen、Evan Landstrom、Donald H. Aue、Fabrice Gallou、Bruce H. Lipshutz

  DOI：10.1039/d0sc00968g

  日期：——

  A new biaryl phosphine-containing ligand from an active palladium catalyst for ppm level Suzuki–Miyaura couplings, enabled by an aqueous micellar reaction medium. A wide array of functionalized substrates including aryl/heteroaryl bromides are amenable, as are, notably, chlorides. The catalytic system is both general and highly effective at low palladium loadings (1000–2500 ppm or 0.10–0.25 mol%).

  一种新型的含钯芳基配体的活性钯催化剂，用于ppm级的Suzuki-Miyaura偶联，可通过胶束反应介质水溶液进行。包括芳基/杂芳基溴化物的各种各样的官能化底物是可取的，尤其是氯化物。在低钯载量（1000-2500 ppm或0.10-0.25 mol％）下，催化系统既通用又高效。密度泛函理论计算表明，在n表示更大的空间拥塞2 PHOS诱导周围的Pd中心增加空间拥挤，帮助动摇2:1配体的Pd（0）配合物更对于N 2 PHOS比EvanPhos（和体积更小的配体） ，从而有利于形成1：1配体– Pd o 在芳基氯化物的氧化加成反应中更具活性的络合物。
• <i>N</i>,<i>C</i>-Disubstituted Biarylpalladacycles as Precatalysts for ppm Pd-Catalyzed Cross Couplings in Water under Mild Conditions
  作者：Ruchita R. Thakore、Balaram S. Takale、Fabrice Gallou、John Reilly、Bruce H. Lipshutz

  DOI：10.1021/acscatal.9b04204

  日期：2019.12.6

  effective palladacycle precatalyst has been identified as that containing an isopropyl group on both an aryl ring and on nitrogen, together with the ligand EvanPhos and triflate as the counterion (P13). This precatalyst is also effective in other C–C bond-forming reactions, such as Heck and Sonogashira couplings. No organic solvents were needed for these processes, while the aqueous reaction medium could be

  在寻找增加胶束催化条件下在水中形成催化剂的有效性的方法时，已经研究了保拉他环的母体双芳基胺骨架特征的各种单取代和解离模式以及抗衡离子的作用，目的是减少其用量偶合反应所需的钯的百分数。选择几种含有易于获得的配体的取代的palladacycles进行评估。结果表明（1）不需要通过还原剂处理将Pd（II）盐作为Suzuki-Miyaura（SM）偶联剂的前体进行预活化；（2）相对于先前基于Pd（II）盐和配体的组合所需的Pd负载，反应可以在Pd负载约一半的条件下进行；P13）。该预催化剂在其他C–C键形成反应中也很有效，例如Heck和Sonogashira偶联。这些过程不需要有机溶剂，而水性反应介质可以循环使用几次。一锅四步的步骤涉及Suzuki-Miyaura，还原，烷基化和酰化反应，突显了这种预催化剂在最大程度地降低成本和废物产生的同时最大程度地提高合成收益的潜力。
• EvanPhos: a ligand for ppm level Pd-catalyzed Suzuki–Miyaura couplings in either organic solvent or water
  作者：Evan B. Landstrom、Sachin Handa、Donald H. Aue、Fabrice Gallou、Bruce H. Lipshutz

  DOI：10.1039/c8gc01356j

  日期：——

  be constructed in only two steps. It complexes Pd(OAc)2 forming a precursor of a very active catalyst useful for Suzuki–Miyaura cross-couplings of functionalized substrates. By a combination of pre-activation, used together with the uncommon solvent EtOAc, the resulting catalyst system is effective at loadings in the ppm (0.1–0.5 mol%) range with highly functionalized reaction partners. Similar reactions

  只需两个步骤即可构建一个新的含联芳基膦的平台。它与Pd（OAc）2形成络合物，形成非常活跃的催化剂的前体，可用于功能化基材的Suzuki-Miyaura交叉偶联。通过与不常见的溶剂EtOAc一起使用的预活化的组合，所得到的催化剂体系在具有高官能化反应伙伴的ppm（0.1-0.5 mol％）范围内的装载量方面是有效的。在含有纳米胶束的水中进行的类似反应快或快。衍生的钯络合物预催化剂具有扩展的工作台稳定性。由此产生的技术代表了高价值的Suzuki-Miyaura联轴器在绿色合成方面的引人注目的进步。
• A new, <i>substituted</i> palladacycle for ppm level Pd-catalyzed Suzuki–Miyaura cross couplings in water
  作者：Balaram S. Takale、Ruchita R. Thakore、Sachin Handa、Fabrice Gallou、John Reilly、Bruce H. Lipshutz

  DOI：10.1039/c9sc02528f

  日期：——

  an aqueous micellar medium, enabling valued Suzuki–Miyaura couplings to be run not only in water under mild conditions, but at 300 ppm of Pd catalyst. This general methodology has been applied to several targets in the pharmaceutical area. Multiple recyclings of the aqueous reaction mixture involving both the same as well as different coupling partners is demonstrated. Low temperature microscopy (cryo-TEM)

  新设计的钯环在联苯环上含有取代基以及配体 HandaPhos，与水性胶束介质特别匹配，使有价值的 Suzuki-Miyaura 偶联不仅可以在温和条件下在水中运行，而且可以在 300 ppm Pd 的条件下运行催化剂。这种通用方法已应用于制药领域的多个目标。证明了涉及相同和不同偶联配对物的水性反应混合物的多次循环。低温显微镜 (cryo-TEM) 可显示充当纳米反应器的颗粒的性质和尺寸。重要的是，考虑到每个反应投入的钯负载量较低，对产品中残留钯的 ICP-MS 分析显示，预期水平完全在 FDA 允许的限度内。
• Regioselective metal catalyzed synthesis of annelated benzimidazoles and azabenzimidazoles
  申请人：ALONSO Jorge

  公开号：US20100216988A1

  公开（公告）日：2010-08-26

  The present invention relates to a process for the regioselective synthesis of compounds of the formula I, wherein R1; R2; R3; R4; J1; J2; J3; J4 and G have the meanings indicated in the claims. The present invention provides a direct metal, e.g. palladium or copper, catalyzed, regioselective process to a wide variety of unsymmetrical, multifunctional N-substituted benzimidazoles or azabenzimidazoles of formula I starting from 2-halo-nitroarenes and N-substituted amides.

  本发明涉及一种用于选择性合成式I化合物的过程，其中R1; R2; R3; R4; J1; J2; J3; J4和G具有声明中所示的含义。本发明提供了一种直接金属，例如钯或铜，催化的、选择性区域的过程，从2-卤代硝基芳烃和N-取代酰胺开始，合成广泛的非对称、多功能的N-取代苯并咪唑或氮杂苯并咪唑式I化合物。