Material Safety Data Sheet Section 1. Identification of the substance Product Name: 2-Bromo-6-(trifluoromethyl)benzoic acid 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-6-(trifluoromethyl)benzoic acid CAS number: 177420-64-3 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: C8H4BrF3O2 Molecular weight: 269.0 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. 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.
Palladium-catalyzed intramolecular tandem cyclization reactions were conducted for the synthesis of densely cis/cis-fused aza-tetracyclic structures. The process involved a palladium(II)-catalyzed aerobic aza-Wacker reaction, followed by a palladium(0)-catalyzed Heckreaction. The effects of the solvent and benzene substitution pattern on the one-pot, two-step cascade reaction were studied systematically
进行了钯催化的分子内串联环化反应,以合成致密的顺式/顺式稠合的氮杂四环结构。该过程涉及钯(II)催化的好氧aza-Wacker反应,然后是钯(0)催化的Heck反应。系统地研究了溶剂和苯的取代方式对一锅两步级联反应的影响,并提出了可能的机理。使用钯催化的aza-Wacker-Heck环化反应,也可以快速合成应变的五氢苯并[ f ]环戊基[ hi ]吲哚并嗪-6-和外消旋的γ-二十烷。
Regioselective Halogen-Metal Exchange Reaction of 3-Substituted 1,2-Dibromo Arenes: The Synthesis of 2-Substituted 5-Bromobenzoic Acids
Regioselective halogen-metalexchangereactions using isopropylmagnesium chloride were carried out on 3-substituted 1,2-dibromo arenes. Eleven examples are given.
Halogen – metal exchange of 3-substituted 1,2-dibromoarenes: the use of long-rangeJCH coupling constants to determine regiochemistry
作者:Lisa DiMichele、Karsten Menzel、Paul Mills、Doug Frantz、Todd Nelson
DOI:10.1002/mrc.1891
日期:2006.11
Regioselective halogen/metalexchange reactions were carried out on a series of 3‐substituted‐ 1,2‐dibromoarenes. Product mixtures were quenched with CO2 to form the corresponding benzoic acid analogs to facilitate HPLC and NMR analysis. Substitution at the 3‐position could readily be assigned on the basis of 2D HMBC long‐range correlations, while assignment at the 2‐position was not as straightforward
2-Bromo-4-(trifluoromethyl)pyridine, aza-analogous to the parent model arene 3-bromobenzotrifluoride, and both the benzo-azaanalogous 2-bromo-4-(trifluoromethyl)quinoline and its regioinverted isomer 4-bromo-2-(trifluoromethyl)quinoline are again readily deprotonated at the Br- and CF3-flanked positions. However, the buttressing caused by the introduction of a methoxy group at the peri-(5-)position impedes