Material Safety Data Sheet Section 1. Identification of the substance Product Name: 2-Iodobenzenesulfonic 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-Iodobenzenesulfonic acid CAS number: 63059-25-6 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, refrigerated. 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: C6H5IO3S Molecular weight: 284.1 Section 10. Stability and reactivity Conditions to avoid: Heat, flames and sparks. Materials to avoid: Oxidizing agents. Possible hazardous combustion products: Carbon monoxide, hydrogen Iodide, sulfur oxides. 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.
PROCESS FOR PRODUCING AMINOALKYLSULFONIC ACID AND METHOD OF SALT EXCHANGE FOR SALT THEREOF
申请人:Wako Pure Chemical Industries, Ltd.
公开号:EP1548002A1
公开(公告)日:2005-06-29
The present invention relates to a method for efficiently producing an aminoalkylsulfonic acid in an industrial scale, and provides
"a process for producing an aminoalkylsulfonic acid represented by the general formula [2]:
wherein R1 and R2 are each independently a hydrogen atom, an alkyl group, an aryl group or an aralkyl group; and R3 and R4 are each independently a hydrogen atom or an alkyl group,
comprising reacting an aminoalkylsulfonate salt represented by the general formula [1]:
wherein M is an alkali metal atom, an organic ammonium ion or an ammonium ion; and R1 to R4 are the same as described above,
an aqueous solution thereof, or a solution dissolving any one of them in a water-soluble organic solvent, selected from alcohols having 1 to 3 carbon atoms, carboxylic acids having 2 to 12 carbon atoms and dimethylformamide, with an organic acid; and
a method of salt exchange for an aminoalkylsulfonate salt represented by the general formula [1']:
wherein M' is an alkali metal atom, an organic ammonium ion or an ammonium ion; and R1 and R4 are the same as described above, comprising reacting an aminoalkylsulfonate salt represented by the above general formula [2] with a hydroxide represented by the general formula [6]:
M'OH [6]
wherein M' is the same as described above,
in an alcohol or water".
Switchable Divergent Synthesis in Gold-Catalyzed Difunctionalizations of <i>o</i>-Alkynylbenzenesulfonamides with Aryldiazonium Salts
作者:Jun Li、Hongwei Shi、Shan Zhang、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1021/acs.orglett.1c02621
日期:2021.10.15
Gold-catalyzed difunctionalizations of o-alkynylbenzenesulfonamides with aryldiazonium salts are reported herein. Upon irradiation with the blue LEDs, benzosultam products were formed via aminoarylation accompanied by the release of N2. Without irradiation, aryldiazonium salts were engaged as efficient electrophiles, facilitating electrophilic deaurations of the vinyl-Au(I) intermediates, followed
本文报道了金催化的邻炔基苯磺酰胺与芳基重氮盐的双官能化。在用蓝色 LED 照射后,苯磺舒坦产物通过氨基芳基化形成,伴随着 N 2的释放。在没有辐照的情况下,芳基重氮盐作为有效的亲电试剂,促进乙烯基-Au(I) 中间体的亲电脱氢,然后互变异构化得到N-芳基取代的 α-亚氨基 ( E )-腙。6 -endo-dig和 5 -exo-dig环化的区域选择性非常好。
[EN] PROCESS FOR THE PREPARATION OF ESTETROL<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION D'ESTÉTROL
申请人:PANTARHEI BIOSCIENCE BV
公开号:WO2013012328A1
公开(公告)日:2013-01-24
The present invention relates to a process for the preparation of estra-1,3,5(10)- trien-3, 15α, 16α, 17β-tetraol (estetrol), via a silyl enol ether derivative 17-B-oxy-3-A-oxy-estra-l,3,5(10), 16-tetraene, wherein A is a protecting group and B is -Si(R2)3. The invention further relates to a process for the synthesis of 3-A-oxy-estra-1,3,5(10), 15-tetraen-17-one, wherein A is a protecting group, via said silyl enol ether derivative.
The present invention relates to a process for the preparation of estra-1,3,5(10)-trien-3,15α,16α,17β-tetraol (estetrol), via a silyl enol ether derivative 17-B-oxy-3-A-oxy-estra-1,3,5(10),16-tetraene, wherein A is a protecting group and B is ―Si(R2)3.
The invention further relates to a process for the synthesis of 3-A-oxy-estra-1,3,5(10),15-tetraen-17-one, wherein A is a protecting group, via said silyl enol ether derivative.
Enyne-substituted benzoisothiazole derivatives have been synthesised under one-pot, operationally simple conditions using 2-iodo-N-(trimethylsilylethynyl)benzenesulfonamides and terminal alkynes as starting materials and a palladium–copper-based catalytic system. The structure of these heterocycles has been demonstrated by NMR spectroscopy and confirmed by X-ray crystallographic analysis. A plausible