5-甲基-1,3-异恶唑-4-甲酸 | 103879-58-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 中文名称: 5-甲基-1,3-异恶唑-4-甲酸
• 中文别名: 5-甲基噁唑-4-甲酸；5-甲基-1,3-恶唑-4-甲酸
• 英文名称: 5-methyloxazole-4-carboxylic acid
• 英文别名: 5-methyl-4-oxazolecarboxylic acid；5-methyl-1,3-oxazole-4-carboxylic acid
• CAS: 103879-58-9
• 化学式: C₅H₅NO₃
• mdl: MFCD08056309
• 分子量: 127.1
• InChiKey: QIACATCUODRSLS-UHFFFAOYSA-N

物化性质

• 沸点：
  274℃
• 密度：
  1.348
• 闪点：
  120℃

计算性质

• 辛醇/水分配系数(LogP)：
  0.6
• 重原子数：
  9
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  63.3
• 氢给体数：
  1
• 氢受体数：
  4

安全信息

• 危险品标志：
  Xi
• 海关编码：
  2934999090
• 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: 5-Methyl-1,3-oxazole-4-carboxylic acid
Synonyms:

---

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

---

Section 3. Composition/information on ingredients.
Ingredient name: 5-Methyl-1,3-oxazole-4-carboxylic acid
CAS number: 103879-58-9

---

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: C5H5NO3
Molecular weight: 127.1

---

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.

---

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：

  5-甲基-1,3-异恶唑-4-甲酸 在 copper(II) oxide 作用下， 以 neat (no solvent) 为溶剂， 以91%的产率得到5-methyloxazole
  参考文献：
  名称：

  广泛开发但尚未报道：区域控制合成和溴恶唑结构单元的Suzuki-Miyaura反应

  摘要：

  优化了所有异构体溴恶唑的合成方法，并将其范围扩展到所有三个异构体母体，以及各种烷基和芳基取代的溴恶唑。直接区位控制的锂化反应，随后与亲电溴源反应是很常见的现象，并且仅在毫克数范围内导致目标取代的2-，4-和5-溴恶唑。在平行合成条件下，Suzuki-Miyaura交叉偶联反应证明了在这项工作中获得的多功能构建基块的效用。

  DOI：

  10.1002/ejoc.201900032
• 作为产物：
  描述：

  5-甲基恶唑-4-甲酸甲酯 在 sodium hydroxide 作用下， 以 甲醇 为溶剂， 反应 4.0h， 以82%的产率得到5-甲基-1,3-异恶唑-4-甲酸
  参考文献：
  名称：

  用于小沟 DNA 识别的可编程寡聚体

  摘要：

  DNA 的四个 Watson-Crick 碱基对可以通过并排配对三个五元芳香羧酰胺、咪唑 (Im)、吡咯 (Py) 和羟基吡咯 (Hp)，四种不同的方式在小沟中区分。基于用于小沟识别的芳环不对称配对边缘的范式，第二代杂环对，咪唑并吡啶/吡咯（Ip/Py）和羟基苯并咪唑/吡咯（Hz/Py），揭示了识别元件不是基于可以实现对远霉素类似物的研究。一组新的末端杂环二聚体，恶唑-羟基苯并咪唑 (No-Hz) 和氯噻吩-羟基苯并咪唑 (Ct-Hz)，与 Py-Py 配对显示结合小沟中 DNA 的连续碱基对，特别是 5' -GT-3' 和 5'-TT-3'，具有高亲和力和选择性。

  DOI：

  10.1021/ja0621795

文献信息

• Syntheses of substituted-oxazolo-1,3,4-thiadiazoles, 1,3,4-oxadiazoles, and 1,2,4-triazoles
  作者：A. Shafiee、E. Naimi、P. Mansobi、A. Foroumadi、M. Shekari

  DOI：10.1002/jhet.5570320424

  日期：1995.7

  Starting from readily available methyl 5-methyloxazole-4-carboxylate (1) and 4-methyl-5-oxazolylcar-boxylic acid hydrazide (11) the title compounds were prepared. The reaction of compound 1 with hydrazine hydrate afforded the corresponding hydrazide 2. The reaction of compound 2 with formic acid yielded 1-formyl-2-(5-methyloxazole-4-carboxyl)hydrazine (3). Refluxing of the latter with phosphorus pentasulfide

  从容易获得的5-甲基恶唑-4-羧酸甲酯（1）和4-甲基-5-恶唑基-羧酰肼（11）开始，制备标题化合物。化合物1与水合肼的反应得到相应的酰肼2。化合物2与甲酸的反应产生1-甲酰基-2-（5-甲基恶唑-4-羧基）肼（3）。后者用五硫化二磷在二甲苯中回流，得到化合物5，产率为62％。化合物3与五氧化二磷反应，得到化合物4。从酰肼11开始，化合物13和14个类似地准备。化合物2与取代的异硫氰酸酯反应，得到化合物9，其在碱性介质中环化成4-烷基-5-（5-甲基-4-恶唑基）-2,4-二氢-3 H -1,2,4-三唑- 3-硫酮（10）。类似地制备异构体19。化合物19的甲基化和随后的氧化得到化合物21。在三氯氧磷存在下，酸7与硫代氨基脲反应，得到2-氨基-5-（5-甲基-4-恶唑基）1,3,4-噻二唑（8）。2-氨基-5-（4-甲基-5-恶唑基）-1,3,4-噻二唑（17通过常规方法由酰氯15制备）。
• [EN] TRICYCLIC INHIBITORS OF HEPATITIS B VIRUS<br/>[FR] INHIBITEURS TRICYCLIQUES DU VIRUS DE L'HÉPATITE B
  申请人：OSPEDALE SAN RAFFAELE SRL

  公开号：WO2020030781A1

  公开（公告）日：2020-02-13

  The present invention relates to compounds that are inhibitors of hepatitis B virus (HBV). Compounds of this invention are useful alone or in combination with other agents for treating, ameliorating, preventing or curing HBV infection and related conditions. The present invention also relates to pharmaceutical compositions containing said compounds.

  本发明涉及抑制乙型肝炎病毒（HBV）的化合物。本发明的化合物可单独使用或与其他药剂结合用于治疗、改善、预防或治愈HBV感染及相关疾病。本发明还涉及含有上述化合物的药物组合物。
• Synthesis of 3-Azabicyclo[3.2.0]heptane-Derived Building Blocks via [3+2] Cycloaddition
  作者：Anton A. Homon、Oleksandr V. Hryshchuk、Serhii Trofymchuk、Oleg Michurin、Yuliya Kuchkovska、Dmytro S. Radchenko、Oleksandr O. Grygorenko

  DOI：10.1002/ejoc.201800972

  日期：2018.11.1

  Synthesis of 3‐azabicyclo[3.2.0]heptane‐derived building blocks via [3+2]cycloaddition of cyclobutene‐1‐carboxylate and azomethine ylide is described. It is shown that the title bicyclic scaffold is a three‐dimensional template which is well‐compatible with lead‐oriented parallel synthesis.

  描述了通过环丁烯-1-羧酸酯和甲亚胺叶立德的[3 + 2]环加成反应合成3-氮杂双环[3.2.0]庚烷的结构单元。结果表明标题双环支架是一个三维模板，与基于铅的平行合成很好地兼容。
• Escaping from Flatland: Antimalarial Activity of sp³-Rich Bridged Pyrrolidine Derivatives
  作者：Brian Cox、James Duffy、Victor Zdorichenko、Corentin Bellanger、Jessica Hurcum、Benoît Laleu、Kevin I. Booker-Milburn、Luke D. Elliott、Michael Robertson-Ralph、Christopher J. Swain、Stephen J. Bishop、Irene Hallyburton、Mark Anderson

  DOI：10.1021/acsmedchemlett.0c00486

  日期：2020.12.10

  We utilized synthetic photochemistry to generate novel sp3-rich scaffolds and report the design, synthesis, and biological testing of a diverse series of amides based on the 1-(amino-methyl)-2-benzyl-2-aza-bicyclo[2.1.1]hexane scaffold. Preliminary antimalarial screening of the library provided promising compounds with activity in the 1–5 μM range with an enhanced hit rate. Further evaluation (solubility

  我们利用合成光化学生成了新型富含sp 3 的支架，并报告了基于 1-（氨基-甲基）-2-苄基-2-氮杂-双环 [2.1 .1]己烷支架。该文库的初步抗疟筛选提供了有希望的化合物，其活性范围为 1–5 μM，并具有更高的命中率。所选化合物 ( 9 ) 的进一步评估（溶解度、药物代谢和药代动力学 (DMPK) 和毒性）表明，该系列代表了进一步优化的绝佳机会，该框架为添加独特的矢量定位的额外功能提供了多种机会。
• Lead optimization of the VU0486321 series of mGlu 1 PAMs. Part 2: SAR of alternative 3-methyl heterocycles and progress towards an in vivo tool
  作者：Pedro M. Garcia-Barrantes、Hyekyung P. Cho、Adam M. Metts、Anna L. Blobaum、Colleen M. Niswender、P. Jeffrey Conn、Craig W. Lindsley

  DOI：10.1016/j.bmcl.2015.12.104

  日期：2016.2

  This Letter describes the further lead optimization of the VU0486321 series of mGlu1 positive allosteric modulators (PAMs), driven by recent genetic data linking loss of function GRM1 to schizophrenia. Steep and caveat-laden SAR plagues the series, but ultimately potent mGlu1 PAMs (EC50s ∼5 nM) have resulted with good DMPK properties (low intrinsic clearance, clean CYP profile, modest Fu) and CNS penetration

  这封信描述了VU0486321系列mGlu 1阳性变构调节剂（PAM）的进一步前导优化，这是由将功能GRM1的丧失与精神分裂症联系起来的最新遗传数据驱动的。陡峭和饱满的SAR困扰着该系列，但最终有效的mGlu 1 PAM（EC 50 s〜5 nM）产生了良好的DMPK特性（低内在清除率，干净的CYP曲线，适度的F u）和CNS渗透率（K p s 0.25–0.97），以及相对于mGlu 4和mGlu 5高达450倍以上的选择性。