3,4-二氟苯乙炔 | 143874-13-9

• 物质功能分类: 化学试剂 - 有机试剂 - 炔烃
• 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: 3,4-二氟苯乙炔
• 中文别名: 4-乙炔-1,2-二氟苯；4-乙炔基-1,2-二氟苯
• 英文名称: 4-ethynyl-1,2-difluorobenzene
• 英文别名: 3,4-difluorophenylacetylene；1-ethynyl-3,4-difluorobenzene
• CAS: 143874-13-9
• 化学式: C₈H₄F₂
• 分子量: 138.117
• InChiKey: XFPAOXIWRDDQGG-UHFFFAOYSA-N

物化性质

• 沸点：
  54/2mm
• 密度：
  1.144 g/mL at 25 °C
• 闪点：
  7 °C

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  10
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  2

安全信息

• 危险品标志：
  F
• 危险类别码：
  R11
• 海关编码：
  2903999090
• WGK Germany：
  3
• 危险品运输编号：
  UN 1993 3/PG 2
• 包装等级：
  II
• 危险类别：
  3
• 危险性防范说明：
  P210
• 危险性描述：
  H225

SDS

Material Safety Data Sheet

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Section 1. Identification of the substance
Product Name: 3,4-Difluorophenylacetylene
Synonyms:

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Section 2. Hazards identification
Harmful by inhalation, in contact with skin, and if swallowed.
H225: Highly flammable liquid and vapour
P210: Keep away from heat/sparks/open flames/hot surfaces. No smoking

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Section 3. Composition/information on ingredients.
Ingredient name: 3,4-Difluorophenylacetylene
CAS number: 143874-13-9

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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.
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.
Storage: Store in closed vessels, refrigerated.

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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
Not specified
Appearance:
Boiling point: No data
Melting point: No data
Flash point: No data
Density: No data
Molecular formula: C8H4F2
Molecular weight: 138.1

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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, hydrogen fluoride.

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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
UN Number: UN1993 Class: 3 Packing group: II
Proper shipping name: FLAMMABLE LIQUIDS, N.O.S. (3,4-Difluorophenylacetylene)

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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：

  3,4-二氟苯乙炔 在 水 作用下， 反应 15.0h， 以67%的产率得到3',4'-二氟苯乙酮
  参考文献：
  名称：

  在末端炔烃直接水合中具有高活性的沸石Y纳米粒子组件†

  摘要：

  合成了具有微中观大分子结构的强酸性沸石Y纳米粒子组件（HNANO-Y），与酸性介孔沸石ZSM-5和Beta催化剂。该特征应归因于以下事实：HNANO-Y中的微-中-大结构有利于质量转移，HNANO-Y上的强酸性部位促进炔烃的水合活性。催化剂可以重复使用六次而不会失去活性。

  DOI：

  10.1039/c6ra11489j
• 作为产物：
  描述：

  4-(2,2-dibromovinyl)-1,2-difluorobenzene 在 正丁基锂 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 2.0h， 生成 3,4-二氟苯乙炔
  参考文献：
  名称：

  针对铜绿假单胞菌感染的纯RhlR拮抗剂的发现和表征。

  摘要：

  铜绿假单胞菌（P.aeruginosa）是一种机会性人类病原体，可形成生物膜并通过群体感应（QS）产生毒力因子。阻断铜绿假单胞菌的QS系统是减少生物膜形成和产生毒力因子的极好策略。RhlR在铜绿假单胞菌的QS系统中发挥重要作用。我们基于4-gingerol的化学结构合成了55个类似物，并使用基于细胞的报告基因菌株测定法评估了它们的RhlR抑制活性。全面的结构-活性关系研究确定了炔基酮30作为最有效的RhlR拮抗剂。该化合物对LasR和PqsR表现出选择性的RhlR拮抗作用，对生物膜的形成有很强的抑制作用，并减少了铜绿假单胞菌中毒力因子的产生。此外，用30只体内处理的黄粉虫幼虫的存活率大大提高。因此，化合物30，一种纯的RhlR拮抗剂，可以用于开发铜绿假单胞菌感染的QS调节分子。

  DOI：

  10.1021/acs.jmedchem.0c00630

文献信息

• <i>N</i>-Difluoromethylthiophthalimide: A Shelf-Stable, Electrophilic Reagent for Difluoromethylthiolation
  作者：Dianhu Zhu、Yang Gu、Long Lu、Qilong Shen

  DOI：10.1021/jacs.5b03170

  日期：2015.8.26

  A new, electrophilic difluoromethylthiolating reagent N-difluoromethylthiophthalimide 3 was developed. Reagent 3 can be readily synthesized in four steps from easily available starting materials phthalimide and TMSCF2H. N-difluoromethylthiophthalimide 3 is a powerful electrophilic difluoromethylthiolating reagent that allows the difluoromethylthiolation of a wide range of nucleophiles including aryl/vinyl

  开发了一种新的亲电子二氟甲基硫代试剂 N-二氟甲基硫代邻苯二甲酰亚胺 3。试剂 3 可以很容易地从容易获得的起始材料邻苯二甲酰亚胺和 TMSCF2H 分四步合成。N-二氟甲基硫代邻苯二甲酰亚胺 3 是一种强大的亲电子二氟甲基硫醇化试剂，可对多种亲核试剂进行二氟甲基硫醇化，包括芳基/乙烯基硼酸、炔烃、胺、硫醇、β-酮酯、羟吲哚和富电子杂芳烃，如吲哚、吡咯、 1H-吡咯并[2,3-b]吡啶、咪唑并[1,2-a]吡啶、氨基噻唑、异恶唑和吡唑在温和条件下。
• Regioselective Conversion of Arenes to<i>N</i>-aryl-1,2,3-triazoles Using CH Borylation
  作者：Rajavel Srinivasan、Anthony G. Coyne、Chris Abell

  DOI：10.1002/chem.201403021

  日期：2014.9.8

  A one‐pot protocol for the synthesis of N‐aryl 1,2,3‐triazoles from arenes by an iridium‐catalyzed CH borylation/copper catalyzed azidation/click sequence is described. 1 mol % of Cu(OTf)2 was found to efficiently catalyze both the azidation and the click reaction. The applicability of this method is demonstrated by the late‐stage chemoselective installation of 1,2,3‐triazole moiety into unactivated

  的单釜协议用于合成Ñ -芳基的1,2,3-三唑从芳烃通过铱催化的Ç  ħ硼化/铜催化的叠氮化/击序列进行说明。发现1mol％的Cu（OTf）2有效地催化了叠氮化和点击反应。1,2,3-三唑部分在化学上重要的未活化分子的后期化学选择性安装证明了该方法的适用性。
• [EN] PYRIDAZINONE COMPOUNDS AND THEIR USE AS DAAO INHIBITORS<br/>[FR] COMPOSÉS DE PYRIDAZINONE ET LEUR UTILISATION EN TANT QU'INHIBITEURS DE LA DAAO
  申请人：TAKEDA PHARMACEUTICAL

  公开号：WO2013027000A1

  公开（公告）日：2013-02-28

  The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof, wherein R1 and R2 are as defined in the specification, processes for their preparation, pharmaceutical compositions containing them and their use in therapy.

  本发明提供了式（I）的化合物及其药用盐，其中R1和R2如规范中定义，其制备方法，含有它们的药物组合物以及它们在治疗中的用途。
• Diphenylacetylene compound, process for preparing the same and liquid
  申请人：Sumitomo Chemical Company, Limited

  公开号：US05658489A1

  公开（公告）日：1997-08-19

  A diphenylacetylene compound of the formula [1]: ##STR1## wherein R is a C.sub.1 -C.sub.12 alkyl group, a C.sub.2 -C.sub.12 alkenyl group or a C.sub.2 -C.sub.16 alkoxyalkyl group; X.sup.1, X.sup.2, X.sup.3, X.sup.4, Y.sup.1, Y.sup.2, Y.sup.3 and Y.sup.4 are independently from each other a --CH-- group, a --CF-- group or a nitrogen atom; A is a hydrogen atom, a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group, a cyano group, a 4-R.sup.1 -(cycloalkyl) group, 4-R.sup.1 -(cycloalkenyl) group or a R.sup.1 --(O).sub.m group in which R.sup.1 is a C.sub.1 -C.sub.12 alkyl group, a C.sub.2 -C.sub.12 alkenyl group or a C.sub.2 -C.sub.12 alkynyl group; and m is 0 or 1, which has an excellent anisotropy of refractive index and a low viscosity and is useful as a component of a liquid crystal composition.

  一种二苯基炔化合物，其化学式为[1]: ##STR1## 其中，R为C1-C12烷基、C2-C12烯基或C2-C16氧烷基；X1、X2、X3、X4、Y1、Y2、Y3和Y4各自独立为--CH--基团、--CF--基团或氮原子；A为氢原子、氟原子、三氟甲基、三氟甲氧基、氰基、4-R1-(环烷基)基团、4-R1-(环烯基)基团或R1--(O)m基团，其中R1为C1-C12烷基、C2-C12烯基或C2-C12炔基；m为0或1，具有优异的折射率各向异性和低粘度，可用作液晶组合物的组分。
• Palladium-Catalyzed Aminocyclization–Coupling Cascades: Preparation of Dehydrotryptophan Derivatives and Computational Study
  作者：Belén Vaz、Claudio Martínez、Francisco Cruz、J. Gabriel Denis、Ángel R. de Lera、José M. Aurrecoechea、Rosana Álvarez

  DOI：10.1021/acs.joc.1c00636

  日期：2021.7.2

  Dehydrotryptophan derivatives have been prepared by palladium-catalyzed aminocyclization-Heck-type coupling cascades starting from o-alkynylaniline derivatives and methyl α-aminoacrylate. Aryl, alkyl (primary, secondary, and tertiary), and alkenyl substituents have been introduced at the indole C-2 position. Further variations at the indole benzene ring, as well as the C-2-unsubstituted case, have

  从邻炔基苯胺衍生物和α-氨基丙烯酸甲酯开始，通过钯催化的氨基环化-Heck型偶联级联制备了脱氢色氨酸衍生物。芳基、烷基（伯、仲和叔）和烯基取代基已在吲哚 C-2 位引入。吲哚苯环的进一步变化以及 C-2-未取代的情况均已得到证明。在 C-2 芳基取代的情况下，通过 Sonogashira 偶联制备邻炔基苯胺底物以及随后的环化-偶联级联是使用单一催化剂的一锅法进行的。 DFT 计算揭示了这些反应的反应曲线相对于丙烯酸甲酯或甲基丙烯酸酯的反应以及游离苯胺与其相应氨基甲酸酯的反应之间存在显着差异。这些计算表明，在 C-C 键形成之前的 HX/烯烃交换步骤中释放的烯烃和酸 HX 的性质可能是实验观察到的反应效率差异的原因。