2,5-二乙基-1,3-噁唑-4-羧酸乙酯 | 23000-15-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 中文名称: 2,5-二乙基-1,3-噁唑-4-羧酸乙酯
• 英文名称: ethyl 2,5-dimethyloxazole-4-carboxylate
• 英文别名: Ethyl 2,5-dimethyl-1,3-oxazole-4-carboxylate
• CAS: 23000-15-9
• 化学式: C₈H₁₁NO₃
• mdl: MFCD06797465
• 分子量: 169.18
• InChiKey: UIJNXKDPFUQGEF-UHFFFAOYSA-N

物化性质

• 沸点：
  112-115°C 10mm
• 密度：
  1?+-.0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  12
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  52.3
• 氢给体数：
  0
• 氢受体数：
  4

安全信息

• 危险品标志：
  Xi
• 安全说明：
  S26,S36/37/39
• 危险类别码：
  R36/37/38
• 海关编码：
  2934999090
• 危险性防范说明：
  P261,P305+P351+P338
• 危险性描述：
  H315,H319,H335

SDS

Material Safety Data Sheet

---

Section 1. Identification of the substance
Product Name: Ethyl 2,5-dimethyl-1,3-oxazole-4-carboxylate
Synonyms:

---

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

---

Section 3. Composition/information on ingredients.
Ingredient name: Ethyl 2,5-dimethyl-1,3-oxazole-4-carboxylate
CAS number: 23000-15-9

---

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, 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
Appearance: Not specified
Boiling point: No data
No data
Melting point:
Flash point: No data
Density: No data
Molecular formula: C8H11NO3
Molecular weight: 169.2

---

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：

  2,5-二乙基-1,3-噁唑-4-羧酸乙酯 在 lithium aluminium tetrahydride 作用下， 生成 (2,5-二甲基-1,3-噁唑-4-基)甲醇
  参考文献：
  名称：

  蛋白质-配体复合物的设计、合成和 X 射线结构：Memapsin 2（β-分泌酶）抑制剂选择性的重要见解

  摘要：

  描述了 memapsin 2 蛋白质-配体复合物的基于结构的设计、合成和 X 射线结构。这些抑制剂专门设计用于与 S2 和 S3 活性位点残基相互作用，以提供对 memapsin 1 和组织蛋白酶 D 的选择性。抑制剂 6 对 memapsin 2 表现出极强的抑制活性，并且对 memapsin 1（>3800 倍）和组织蛋白酶具有选择性D（>2500 倍）。蛋白质-配体晶体结构揭示了 memapsin 2 的 S2 和 S3 活性位点中的协同相互作用。这些相互作用可以作为设计 memapsin 1 和组织蛋白酶 D 选择性的重要指南。

  DOI：

  10.1021/ja058636j
• 作为产物：
  描述：

  2-(羟亚氨基)乙酰乙酸乙酯 在 palladium on activated charcoal 氯化亚砜 、 氢气 、 溶剂黄146 作用下， 以 苯 为溶剂， 23.0~30.0 ℃ 、344.74 kPa 条件下， 反应 3.0h， 生成 2,5-二乙基-1,3-噁唑-4-羧酸乙酯
  参考文献：
  名称：

  蛋白质-配体复合物的设计、合成和 X 射线结构：Memapsin 2（β-分泌酶）抑制剂选择性的重要见解

  摘要：

  描述了 memapsin 2 蛋白质-配体复合物的基于结构的设计、合成和 X 射线结构。这些抑制剂专门设计用于与 S2 和 S3 活性位点残基相互作用，以提供对 memapsin 1 和组织蛋白酶 D 的选择性。抑制剂 6 对 memapsin 2 表现出极强的抑制活性，并且对 memapsin 1（>3800 倍）和组织蛋白酶具有选择性D（>2500 倍）。蛋白质-配体晶体结构揭示了 memapsin 2 的 S2 和 S3 活性位点中的协同相互作用。这些相互作用可以作为设计 memapsin 1 和组织蛋白酶 D 选择性的重要指南。

  DOI：

  10.1021/ja058636j

文献信息

• CpRu-Catalyzed O−H Insertion and Condensation Reactions of α-Diazocarbonyl Compounds
  作者：Martina Austeri、Diane Rix、Walid Zeghida、Jérôme Lacour

  DOI：10.1021/ol2000815

  日期：2011.3.18

  ligands catalyze together the decomposition of α-diazocarbonyl compounds leading to O−H insertion and condensation reactions. In comparison with Rh(II) and Cu(I) complexes, the CpRu catalysts produce rapid and often more selective reactions. Promising enantioselectivities are obtained in dioxole syntheses.

  [CpRu（CH 3 CN）3 ] [PF 6 ]和二亚胺配体一起催化α-重氮羰基化合物的分解，导致OH插入和缩合反应。与Rh（II）和Cu（I）配合物相比，CpRu催化剂可产生快速且通常更具选择性的反应。在二恶唑合成中获得有希望的对映选择性。
• Design, Synthesis, and X-ray Structure of Potent Memapsin 2 (β-Secretase) Inhibitors with Isophthalamide Derivatives as the P₂_-P₃-Ligands
  作者：Arun K. Ghosh、Nagaswamy Kumaragurubaran、Lin Hong、Sarang S. Kulkarni、Xiaoming Xu、Wanpin Chang、Vajira Weerasena、Robert Turner、Gerald Koelsch、Geoffrey Bilcer、Jordan Tang

  DOI：10.1021/jm061338s

  日期：2007.5.1

  Structure-based design and synthesis of a number of potent and selective memapsin 2 inhibitors are described. These inhibitors were designed based upon the X-ray structure of memapsin 2-bound inhibitor 3 that incorporates methylsulfonyl alanine as the P2-ligand and a substituted pyrazole as the P3-ligand. Of particular importance, we examined the ability of the substituted isophthalic acid amide derivative

  描述了基于结构的设计和许多有效的和选择性的memapsin 2抑制剂的合成。这些抑制剂是根据结合了美甲新素2的抑制剂3的X射线结构设计的，该抑制剂结合了甲基磺酰基丙氨酸作为P2-配体和取代的吡唑作为P3-配体。特别重要的是，我们研究了取代的间苯二甲酸酰胺衍生物模拟3-结合美普金2酶活性位点S2-S3区域中关键相互作用的能力。我们研究了各种取代的苯乙基，α-甲基苄基和恶唑基甲基组作为P3-配体。许多抑制剂对mempasin 2表现出非常强的抑制活性，对memapsin 1表现出良好的选择性。抑制剂5d显示出较低的纳摩尔酶抑制能力（Ki = 1。1 nM）和非常好的细胞抑制活性（IC50 = 39 nM）。此外，在一项初步研究中，抑制剂5d已显示，单次腹膜内给药（8 mg / kg）后，转基因小鼠的Abeta40产量降低了30％。5d结合的memapsin 2的蛋白质-配体X射线晶体结构提供了
• The synthesis of oxazoles by thermolysis or photolysis of 2-acylisoxazol-5-ones
  作者：Kiah H. Ang、Rolf H. Prager、Jason A. Smith、Ben Weber、Craig M. Williams

  DOI：10.1016/0040-4039(95)02240-6

  日期：1996.1

  N-acylisoxazol-5-ones are converted into the corresponding 2-substituted oxazoles by photolysis at 300 or 254nm, or by flash vacuum pyrolysis. The former procedure is favoured for isoxazolones with electron withdrawing groups at C-4, and pyrolysis for all others.

  通过在300或254nm处进行光解或通过快速真空热解将N-酰基异恶唑-5-酮转化为相应的2-取代的恶唑。前一种方法适用于在C-4具有吸电子基团的异恶唑酮，而对于所有其他方法均热解。
• Chemistry of 5-oxodihydroisoxazoles. Part 18.1 Synthesis of oxazoles by the photolysis and pyrolysis of 2-acyl-5-oxo-2,5-dihydroisoxazoles
  作者：Rolf H. Prager、Jason A. Smith、Ben Weber、Craig M. Williams

  DOI：10.1039/a700134g

  日期：——

  N-Acylisoxazol-5-ones lose carbon dioxide under photochemical and thermal conditions affording iminocarbenes which undergo intramolecular cyclisation through the oxygen of the acyl group to give oxazoles. Under photochemical conditions those acylisoxazolones with electron withdrawing groups at C-4 usually give high yields of oxazoles, while those with electron donating groups at C-4 give only poor yields: the reverse is observed under thermal conditions.

  N-酰基异恶唑-5-酮在光化学和热条件下失去二氧化碳，生成亚胺卡宾，随后通过酰基团的氧进行分子内环化，形成恶唑。在光化学条件下，C-4位带有吸电子基团的酰基异恶唑酮通常产生高产率的恶唑，而在C-4位带有供电子基团的酰基异恶唑酮仅产生低产率：在热条件下观察到相反的结果。
• α,β-Unsaturated Carboxylic Acid Derivatives. XII. A Convenient Synthesis of Oxazole-4-carboxylic and 3,3-Dibromo-2,2-diamino Acids
  作者：Chung-gi Shin、Yoshiaki Sato、Hidetoshi Sugiyama、Katsumi Nanjo、Juji Yoshimura

  DOI：10.1246/bcsj.50.1788

  日期：1977.7

  Treatment of t-butyl 2-acetylamino-3-bromo-2-alkenoate with triethylamine gave t-butyl 5-alkyl-2-methyloxazole-4-carboxylate by dehydrobromination, but no reaction occurred with primary amines. While treatment of t-butyl 2-acetylimino-3,3-dibromoalkanoate with hydroxylamine or several aliphatic and aromatic primary amines gave addition products, t-butyl 2-acetylamino-3,3-dibromo-2-(hydroxyamino)- and

  用三乙胺处理 2-乙酰氨基-3-溴-2-链烯酸叔丁酯，通过脱溴化氢得到 5-烷基-2-甲基恶唑-4-羧酸叔丁酯，但与伯胺不发生反应。用羟胺或几种脂肪族和芳香族伯胺处理 2-乙酰亚氨基-3,3-二溴链烷酸叔丁酯得到加成产物 2-乙酰氨基-3,3-二溴-2-(羟基氨基)-和2- (取代的氨基)链烷酸酯，分别以相当好的产率。