Material Safety Data Sheet Section 1. Identification of the substance Product Name: 2-Bromo-1-iodo-4-(trifluoromethoxy)benzene Synonyms: Section 2. Hazards identification Harmful by inhalation, in contact with skin, and if swallowed. Section 3. Composition/information on ingredients. Ingredient name: 2-Bromo-1-iodo-4-(trifluoromethoxy)benzene CAS number: 883546-30-3 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. 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: C7H3BrF3IO Molecular weight: 366.9 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, hydrogen bromide, hydrogen Iodide. 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.
Structure–Activity Relationships of Antitubercular Nitroimidazoles. 3. Exploration of the Linker and Lipophilic Tail of ((S)-2-Nitro-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazin-6-yl)-(4-trifluoromethoxybenzyl)amine (6-Amino PA-824).
摘要:
The (S)-2-nitro-6-(4-(trifluoromethoxy)benzyloxy)-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazine named PA-824 (1) has demonstrated antitubercular activity in vitro and in animal models and is currently in clinical trials. We synthesized derivatives at three positions of the 4-(trifluoromethoxy)benzylamino tail, and these were tested for whole-cell activity against both replicating and nonreplicating Mycobacterium tuberculosis (Mtb). In addition, we determined their kinetic parameters as substrates of the deazaflavin-dependent nitroreductase (Ddn) from Mtb that reductively activates these pro-drugs. These studies yielded multiple compounds with 40 nM aerobic whole cell activity and 1.6 mu M anaerobic whole cell activity: 10-fold improvements over both characteristics from the parent molecule. Some of these compounds exhibited enhanced solubility with acceptable stability to microsomal and in vivo metabolism. Analysis of the conformational preferences of these analogues using quantum chemistry suggests a preference for a pseudoequatorial orientation of the linker and lipophilic tail.
[EN] MODULATORS OF HSD17B13 AND METHODS OF USE THEREOF<br/>[FR] MODULATEURS DE HSD17B13 ET LEURS PROCÉDÉS D'UTILISATION
申请人:REGENERON PHARMA
公开号:WO2021003295A1
公开(公告)日:2021-01-07
The disclosure relates to compounds and pharmaceutical compositions capable of modulating the hydroxysteroid 17-beta dehydrogenase (HSD17B) family member proteins including inhibiting the HSD17B member proteins, e.g. HSD17B13. The disclosure further relates to methods of treating liver diseases, disorders, or conditions with the compounds and pharmaceutical compositions disclosed herein, in which the HSD17B family member protein plays a role.
Synthesis of Divergent Benzo[<i>b</i>]fluorenones through Cycloaromatization Reactions of 1,5-Enynols and 1,5-Diynols
作者:Bingyu Yan、Yang Fu、Hui Zhu、Zhiyuan Chen
DOI:10.1021/acs.joc.9b00231
日期:2019.4.5
A facile and efficient synthesis of divergent benzo[b]fluorenones is described through the use of dichlorobenzoquinone-promoted oxidative cycloaromatization reactions of acyclic 1,5-enynols and 1,5-diynols. The success of these cascadereactions depends on the chemoselectivity of the initial Meyer–Schuster rearrangement to produce allenol intermediate, which is followed by regioselective Schmittel
通过使用二氯苯醌促进的无环1,5-烯醇和1,5-二炔醇的氧化环芳构化反应,描述了发散的苯并[ b ]芴酮的简便高效合成方法。这些级联反应的成功取决于初始Meyer-Schuster重排产生烯丙醇中间体的化学选择性,随后是区域选择性的Schmittel环化反应,以及随后的Friedal-Crafts烷基化反应或末端Ar部分的自由基进攻。反应中仅需要氧化剂和溶剂,因此在不含金属的条件下提供了一个小的库,具有所需的具有优异的官能团耐受性的预期多碳环产物。选定的苯并[ b]的吸收和光致发光特性还研究了芴酮。结果表明,在苯基部分包含给电子体4-OMe基团的化合物(2h)显示出深绿色发射光(491nm)。
Nonafluoro-<i>tert</i>-butoxylation of Diaryliodonium Salts
and scalability. In comparison with the conventional approach, this method avoids the use of nonafluoro-tert-butyl alcohol as the reaction solvent and does not require handling of hazardous diazonium salts. A series of OC(CF3)3-containing analogues of 19F NMR-based probes targeting various biologically relevant analytes are prepared.
开发了一种将九氟叔丁氧基结合到各种芳烃中的高效方法。在没有过渡金属催化剂且官能团耐受性和可扩展性良好的情况下,这种C-O交叉偶联反应可以顺利进行。与常规方法相比,该方法避免了使用九氟叔丁醇作为反应溶剂,并且不需要处理有害的重氮盐。制备了一系列针对各种生物相关分析物的19 F NMR基探针的一系列含OC(CF 3)3的类似物。
Photoinduced Synthesis of Dibenzofurans: Intramolecular and Intermolecular Comparative Methodologies
作者:Patricia Camargo Solórzano、Federico Brigante、Adriana B. Pierini、Liliana B. Jimenez
DOI:10.1021/acs.joc.8b00742
日期:2018.8.3
The SRN1 reaction has been used as a powerful tool for the synthesis of heterocycles, and only a few studies about photoinduced intramolecular cyclization to generate a new C–O bond by a radical pathway have been reported. This work introduces two strategies for the synthesis of substituted dibenzofurans by electron transfer (eT) reactions. The first one is a three-step process that comprises bromination
S RN 1反应已被用作合成杂环的有力工具,并且仅报道了少数有关通过自由基途径光诱导分子内环化以生成新的C-O键的研究。这项工作介绍了两种通过电子转移(eT)反应合成取代的二苯并呋喃的策略。第一个是三步过程,其中包括溴化o-芳基苯酚,Suzuki-Miyaura交叉偶联和光诱导的环化反应,以获得上述产物。第二种是无金属工艺,不需要任何光催化剂。测试了不同的溶剂,收率范围从低到中等。在两种方法之间建立了比较,表明第二种方法最适合合成二苯并呋喃。
Pd/Cu-Catalyzed Cascade C(sp<sup>3</sup>)–H Arylation and Intramolecular C–N Coupling: A One-Pot Synthesis of 3,4-2<i>H</i>-Quinolinone Skeletons
作者:Han-Zhi Xiao、Wen-Shu Wang、Yu-Song Sun、Hao Luo、Bo-Wen Li、Xiao-Dong Wang、Wei-Li Lin、Fei-Xian Luo
DOI:10.1021/acs.orglett.9b00214
日期:2019.3.15
In this letter, we successfully explored a cascade Pd/Cu-catalyzed intermolecular C(sp3)–H arylation of amides and intramolecular C–N coupling reaction. This method provides a one-pot strategy to synthesize 3,4-2H-quinolinone with good regioselectivity of C–H arylation and C–N coupling from C–I and C–X bonds from readily available starting materials.