2-(甲基硫代)苯甲酸甲酯 | 3704-28-7

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 中文名称: 2-(甲基硫代)苯甲酸甲酯
• 中文别名: 2-(甲硫基)苯甲酸甲酯
• 英文名称: methyl 2-(methylthio)benzoate
• 英文别名: methyl 2-(methylsulfanyl)benzoate；methyl 2-methylsulfanylbenzoate
• CAS: 3704-28-7
• 化学式: C₉H₁₀O₂S
• mdl: MFCD00068039
• 分子量: 182.243
• InChiKey: CPQDZXPLQXZJGF-UHFFFAOYSA-N

物化性质

• 熔点：
  66-69 °C(lit.)
• 沸点：
  285.65°C (rough estimate)
• 密度：
  1.2385 (rough estimate)
• 保留指数：
  1554.6
• 稳定性/保质期：
  在常温常压下保持稳定

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  12
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.222
• 拓扑面积：
  51.6
• 氢给体数：
  0
• 氢受体数：
  3

安全信息

• 危险品标志：
  Xi
• 安全说明：
  S24/25
• WGK Germany：
  3
• 海关编码：
  2930909090
• 储存条件：
  常温、避光、通风干燥处，密封保存。

SDS

Name:	Methyl 2-(Methylthio)Benzoate Material Safety Data Sheet
Synonym:	None Known
CAS:	3704-28-7

Section 1 - Chemical Product MSDS Name:Methyl 2-(Methylthio)Benzoate Material Safety Data Sheet
Synonym:None Known

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Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS

CAS#	Chemical Name	content	EINECS#
3704-28-7	Methyl 2-(Methylthio)Benzoate	ca. 100	unlisted

Hazard Symbols: None Listed.
Risk Phrases: None Listed.

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Section 3 - HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
The toxicological properties of this material have not been fully investigated.
Potential Health Effects
Eye:
May cause eye irritation.
Skin:
May cause skin irritation.
Ingestion:
May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.
Inhalation:
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
Chronic:
No information found.

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Section 4 - FIRST AID MEASURES
Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:
Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
Ingestion:
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. Wash mouth out with water.
Inhalation:
Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:

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Section 5 - FIRE FIGHTING MEASURES
General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Runoff from fire control or dilution water may cause pollution.
Extinguishing Media:
Use water spray, dry chemical, carbon dioxide, or chemical foam. Use agent most appropriate to extinguish fire.

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Section 6 - ACCIDENTAL RELEASE MEASURES
General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, observing precautions in the Protective Equipment section. Avoid generating dusty conditions.
Provide ventilation.

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Section 7 - HANDLING and STORAGE
Handling:
Wash thoroughly after handling. Use with adequate ventilation.
Minimize dust generation and accumulation. Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing.
Keep container tightly closed. Avoid ingestion and inhalation.
Storage:
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

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Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate ventilation to keep airborne concentrations low.
Exposure Limits CAS# 3704-28-7: Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

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Section 9 - PHYSICAL AND CHEMICAL PROPERTIES

Physical State: Solid
Color: Not available.
Odor: stench
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: 66 - 69 deg C
Autoignition Temperature: Not available.
Flash Point: Not available.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water:
Specific Gravity/Density:
Molecular Formula: C9H10O2S
Molecular Weight: 182.1288

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Section 10 - STABILITY AND REACTIVITY
Chemical Stability:
Stable at room temperature in closed containers under normal storage and handling conditions.
Conditions to Avoid:
Incompatible materials, dust generation, excess heat.
Incompatibilities with Other Materials:
Oxidizing agents.
Hazardous Decomposition Products:
Carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide.
Hazardous Polymerization: Has not been reported

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Section 11 - TOXICOLOGICAL INFORMATION
RTECS#:
CAS# 3704-28-7 unlisted.
LD50/LC50:
Not available.
Carcinogenicity:
Methyl 2-(Methylthio)Benzoate - Not listed by ACGIH, IARC, or NTP.

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Section 12 - ECOLOGICAL INFORMATION

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Section 13 - DISPOSAL CONSIDERATIONS
Dispose of in a manner consistent with federal, state, and local regulations.

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Section 14 - TRANSPORT INFORMATION

IATA
Not regulated as a hazardous material.
IMO
Not regulated as a hazardous material.
RID/ADR
Not regulated as a hazardous material.

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Section 15 - REGULATORY INFORMATION

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: Not available.
Risk Phrases:
Safety Phrases:
S 24/25 Avoid contact with skin and eyes.
WGK (Water Danger/Protection)
CAS# 3704-28-7: No information available.
Canada
None of the chemicals in this product are listed on the DSL/NDSL list.
CAS# 3704-28-7 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 3704-28-7 is not listed on the TSCA inventory.
It is for research and development use only.

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SECTION 16 - ADDITIONAL INFORMATION
N/A

反应信息

• 作为反应物：
  描述：

  2-(甲基硫代)苯甲酸甲酯 在 dimethyl sulfide borane 、 magnesium 、 丙酸 作用下， 以 乙醚 、 正己烷 为溶剂， 反应 3.5h， 生成 1-isopropyl-2-methylsulfanyl-benzene
  参考文献：
  名称：

  在硫化物氧化中的电子效应，位阻和邻位异构辅助。通过硫-氧非键相互作用的邻域参与

  摘要：

  使用一组硫化物o-和p -XC 6 H 4 SMe，通过动力学方法研究了电子效应，空间位阻和TsNHCl加亲电Cl +和NalO 4进行O-转移的邻位助剂。通过比较邻位和对位取代的化合物的反应性（κ= k o / k p），评估了邻位取代基的空间效应和邻位助剂。对于邻居基团的活性，获得以下顺序：CH 2 OH〜CH 2OME〜CH 2 CO 2我

  DOI：

  10.1039/p29880001123
• 作为产物：
  描述：

  硫代水杨酸 在 氯化亚砜 作用下， 生成 2-(甲基硫代)苯甲酸甲酯
  参考文献：
  名称：

  Flash vacuum pyrolysis of stabilised phosphorus ylides. Part 12.1 Extrusion of Ph3P from sulfonyl ylides and reactivity of the resulting sulfonyl carbenes

  摘要：

  已制备十二种磺酰稳定的磷亚叶立德，并研究了它们在600 °C下的快速真空热解行为。带有芳基磺酰取代基的例子会失去Ph3PO，产生难以处理的产物，而带有芳基甲基磺酰取代基的则分别失去Ph3P和SO2，生成与磺酰烯烃中间体一致的产物。对每个系列中一种亚叶立德的X射线结构测定显示，第一种情况下P–O之间的非键合相互作用更为显著，这为不同的热反应性提供了一些解释。

  DOI：

  10.1039/a707948f

文献信息

• α-Heteroarylation of Thioethers via Photoredox and Weak Brønsted Base Catalysis
  作者：Edwin Alfonzo、Sudhir M. Hande

  DOI：10.1021/acs.orglett.1c02151

  日期：2021.8.6

  thioethers to α-thio alkyl radicals and their addition to N-methoxyheteroarenium salts for the redox-neutral synthesis of α-heteroaromatic thioethers. Studies are consistent with a two-step activation mechanism, where oxidation of thioethers to sulfide radical cations by a photoredox catalyst is followed by α-C–H deprotonation by a weak Brønsted base catalyst to afford α-thio alkyl radicals. Further,

  我们报告了硫醚对 α-硫代烷基自由基的 C-H 活化以及它们与N-甲氧基杂芳鎓盐的加成，用于氧化还原中性合成 α-杂芳族硫醚。研究与两步活化机制一致，其中通过光氧化还原催化剂将硫醚氧化为硫化物自由基阳离子，然后通过弱 Brønsted 碱催化剂进行 α-C-H 去质子化以提供 α-硫代烷基自由基。此外，N-甲氧基杂芳鎓盐作为甲氧基自由基的来源，有助于α-硫代烷基自由基的产生和再生光氧化还原催化循环的牺牲氧化剂，发挥了额外的作用。
• Modulation of photochemical oxidation of thioethers to sulfoxides or sulfones using an aromatic ketone as the photocatalyst
  作者：Bin Zhao、Gerald B. Hammond、Bo Xu

  DOI：10.1016/j.tetlet.2021.153376

  日期：2021.10

  We have developed an eco-friendly and chemo-selective photocatalytic synthesis of sulfoxides or sulfones via oxidation of sulfides (thioethers) at ambient temperature using air or O2 as the oxidant. An inexpensive thioxanthone was used as the photocatalyst. Our method offers excellent chemical yields and good functional group tolerance. The hydrogen bonding between hexafluoro-2-propanol (HFIP) and

  我们开发了一种环保且化学选择性的光催化合成亚砜或砜，通过在环境温度下使用空气或 O 2作为氧化剂氧化硫化物（硫醚）。廉价的噻吨酮被用作光催化剂。我们的方法提供了出色的化学产率和良好的官能团耐受性。六氟-2-丙醇 (HFIP) 和亚砜之间的氢键可能在最大限度地减少亚砜的过度氧化方面发挥重要作用。
• Nickel‐Catalyzed Inter‐ and Intramolecular Aryl Thioether Metathesis by Reversible Arylation
  作者：Tristan Delcaillau、Alessandro Bismuto、Zhong Lian、Bill Morandi

  DOI：10.1002/anie.201910436

  日期：2020.1.27

  A nickel-catalyzed aryl thioether metathesis has been developed to access high-value thioethers. 1,2-Bis(dicyclohexylphosphino)ethane (dcype) is essential to promote this highly functional-group-tolerant reaction. Furthermore, synthetically challenging macrocycles could be obtained in good yield in an unusual example of ring-closing metathesis that does not involve alkene bonds. In-depth organometallic

  已经开发出镍催化的芳基硫醚复分解反应来获得高价值的硫醚。1,2-双（二环己基膦基）乙烷（dcype）对于促进这种高度官能团耐受的反应至关重要。此外，在不涉及烯键的闭环易位的不寻常实例中，可以高收率获得具有合成挑战性的大环化合物。深入的有机金属研究支持产物形成的可逆Ni0 / NiII途径。总体而言，这项工作不仅为以前的基于Pd的催化体系提供了更可持续的替代方法，而且还提出了与异常单键易位反应的进一步开发和应用高度相关的新应用和机理信息。
• [EN] NOVEL HETEROCYCLIC ACRYLAMIDES AND THEIR USE AS PHARMACEUTICALS<br/>[FR] NOUVEAUX ACRYLAMIDES HÉTÉROCYCLIQUES ET LEUR UTILISATION EN TANT QUE PRODUITS PHARMACEUTIQUES
  申请人：FAB PHARMA SAS

  公开号：WO2011061214A1

  公开（公告）日：2011-05-26

  The invention relates to novel heterocyclic acrylamide compounds (I), to the preparation of the compounds and intermediates used therein, to the use of the compounds as antibacterial medicaments and pharmaceutical compositions containing the compounds.

  这项发明涉及新颖的杂环丙烯酰胺化合物（I），涉及该化合物及其中间体的制备，涉及将该化合物用作抗菌药物以及含有该化合物的药物组合物的用途。
• ortho-Effect on the acid-catalyzed hydration of 2-substituted α-methylstyrenes
  作者：Ondřej Prusek、Filip Bureš、Oldřich Pytela

  DOI：10.1135/cccc2008115

  日期：——

  α-Methylstyrene and nine ortho-substituted analogs have been synthesized and the kinetics of their acid-catalyzed hydration in aqueous solutions of sulfuric acid at 25 °C have been investigated. The kinetic acidity function H_S has been constructed from the dependence of the observed rate constants k_obs on the sulfuric acid concentration. The catalytic rate constants of the acid-catalyzed hydration k_ortho have been calculated as well. The identical shape of the kinetic acidity functions for ortho- and para-derivatives confirms what the consistent mechanism A-SE2 of the acid-catalyzed hydration has already proved for the corresponding para-derivatives. The A-SE2 mechanism involves a rate-determining proton transfer of the hydrated proton to the substrate. From the dependence of the catalytic rate constants of the ortho-derivatives on the catalytic rate constants of the para-derivatives, it is seen that the logarithm of the catalytic rate constant for hydrogen as a substituent is markedly out of the range of the other substituents and, simultaneously, that the ortho-derivatives react significantly slower than the corresponding para-derivatives. In correlation with the substitent constants σ_p⁺, a reaction constant of ρ⁺ = –1.45 have been found. The constant is, in absolute value, considerably smaller than that for para-derivatives (ρ⁺ = –3.07). In parallel, the steric effects are enforced more significantly for the monoatomic substituents (slope of the Charton’s constants 3.92) than for substituents including more atoms (slope of the Charton’s constants 2.09). A small value of the reaction constant ρ⁺ has been elucidated due to the lower conjugation between the reaction centre and the benzene ring as a consequence of the geometric twist of the reaction centre out of the main aromatic plane accompanied by fading mesomeric interaction between the reaction centre and the substituents attached to the benzene ring. The isopropyl group in the carbocation is twisted less out of the aromatic plane for the monoatomic substituents and, therefore, also a small difference in the bulk of substituents has considerable steric influence on the conjugation between the carbocation and the benzene ring bearing substituents. On the contrary, the isopropyl group in the carbocations with polyatomic substituents is twisted to such a degree that changes in the bulk of substituents affect the resonant stabilization negligibly. Similar conclusions were also deduced from the correlations of the substitution constants σI and σ_R⁺.

  α-甲基苯乙烯和九个邻位取代物已经合成，并研究了它们在25°C硫酸水溶液中酸催化水合的动力学。动力学酸度函数HS已经根据观察到的速率常数kobs对硫酸浓度的依赖关系构建。酸催化水合的催化速率常数kortho也已计算。邻位取代物和对位取代物的动力学酸度函数的相同形状证实了酸催化水合的一致机制A-SE2已经为相应的对位取代物证明。A-SE2机制涉及水合质子向底物的速率决定性质子转移。从邻位取代物的催化速率常数依赖于对位取代物的催化速率常数的关系中可以看出，氢作为取代基的催化速率常数的对数明显超出了其他取代基的范围，并且同时，邻位取代物的反应速度明显比相应的对位取代物慢。与取代基常数σp+的相关性，发现了一个反应常数ρ+ = -1.45。该常数的绝对值比对位取代物的常数（ρ+ = -3.07）要小得多。与取代基常数的斜率3.92相比，对于包含更多原子的取代基（Charton常数的斜率为2.09），单原子取代基的立体效应更为显著。由于反应中心与苯环之间的共轭减弱，导致反应中心扭曲出主要芳香平面并伴随着与连接到苯环的取代基之间的消退的共轭作用，解释了反应常数ρ+的小值。对于单原子取代基，卡宾离子中的异丙基团扭曲得较少，因此，取代基的体积差异对卡宾离子与携带取代基的苯环之间的共轭影响很大。相反，对于具有多原子取代基的卡宾离子中的异丙基团扭曲程度较大，因此，取代基体积的变化对共振稳定化的影响微乎其微。类似的结论也可以从取代常数σI和σR+的相关性推导出。

表征谱图