Material Safety Data Sheet Section 1. Identification of the substance 5-Fluoro-2-(trifluoromethyl)phenylacetic acid Product Name: Synonyms: Section 2. Hazards identification Harmful by inhalation, in contact with skin, and if swallowed. H315: Causes skin irritation H319: Causes serious eye irritation H335: May cause respiratory irritation P261: Avoid breathing dust/fume/gas/mist/vapours/spray Wear protective gloves/protective clothing/eye protection/face protection P280: P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do – continue rinsing P304+P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing P405: Store locked up Section 3. Composition/information on ingredients. 5-Fluoro-2-(trifluoromethyl)phenylacetic acid Ingredient name: CAS number: 239135-52-5 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. Wash out mouth with copious amounts of water for at least 15 minutes. Seek medical attention. Ingestion: 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. Storage: Store in closed vessels. 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 Not specified Appearance: Boiling point: No data Melting point: No data Flash point: No data Density: No data Molecular formula: C9H6F4O2 Molecular weight: 222.1 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. 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.
JAK家族激酶是免疫细胞信号传导的重要介体,Janus激酶3(JAK3)长期以来一直被视为自身免疫性疾病的潜在靶标。开发高选择性JAK3抑制剂的努力已经很多年了。但是,由于JAK3对5'-三磷酸腺苷(ATP)的强烈结合偏好,许多抑制剂在酶和细胞效能之间显示出较大的差距,这阻碍了剖析JAK3在细胞环境中的作用。使用靶向共价抑制剂方法,我们发现了化合物32,该化合物克服了酶促测定中的ATP竞争(1 mM),并证明了对小鼠CTLL-2和人外周血单核细胞中JAK3依赖性信号传导的抑制活性显着提高。化合物32在JAK家族中还显示出高选择性和良好的药代动力学特性。因此,它可能是一种非常有价值的工具分子,用于研究JAK家族激酶在复杂生物学环境中的重叠作用。我们的研究还表明,对于共价激酶抑制剂,尤其是那些针对具有低K m ATP值的激酶的抑制剂,应仔细优化分子与蛋白质之间的可逆相互作用,以提高整体效能。
Direct Catalytic Enantioselective Benzylation from Aryl Acetic Acids
作者:Patrick J. Moon、Zhongyu Wei、Rylan J. Lundgren
DOI:10.1021/jacs.8b11390
日期:2018.12.19
We demonstrate that metal-catalyzed enantioselective benzylation reactions of allylic electrophiles can occur directly from aryl acetic acids. The reaction proceeds via a pathway in which decarboxylation is the terminal event, occurring after stereoselective carbon-carbon bond formation. This mechanistic feature enables enantioselective benzylation without the generation of a highly basic nucleophile
The present invention relates to compounds of Formula (I)
and their pharmaceutically acceptable salts, wherein the substituents are as described herein, and their use in medicine, in particular as Trk antagonists.
A compound represented by the formula (I):
or a pharmacologically acceptable salt thereof, wherein Ar
1
represents an imidazolyl group or the like which may be substituted with a C1-6 alkyl group, Ar
2
represents a phenyl group or the like which may be substituted with a C1-6 alkoxy group, X
1
represents a double bond or the like and Het represents a triazolyl group or the like which may be substituted with a C1-6 alkyl group or the like, is effective as a therapeutic or prophylactic agent for a disease caused by Aβ.
Phosphonic Acid Analogs of Fluorophenylalanines as Inhibitors of Human and Porcine Aminopeptidases N: Validation of the Importance of the Substitution of the Aromatic Ring
A library of phosphonic acid analogs of phenylalanine substituted with fluorine, chlorine and trifluoromethyl moieties on the aromaticring was synthesized and evaluated for inhibitory activity against human (hAPN) and porcine (pAPN) aminopeptidases. Fluorogenic screening indicated that these analogs are micromolar or submicromolar inhibitors, both enzymes being more active against hAPN. In order to