Material Safety Data Sheet Section 1. Identification of the substance Product Name: 4-Butoxy-3-fluorophenylboronic acid Synonyms: Section 2. Hazards identification Harmful by inhalation, in contact with skin, and if swallowed. Section 3. Composition/information on ingredients. Ingredient name: 4-Butoxy-3-fluorophenylboronic acid CAS number: 156487-13-7 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: C10H14BFO3 Molecular weight: 212.0 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. 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.
LIQUID CRYSTALLINE COMPOUND HAVING NEGATIVE DIELECTRIC ANISOTROPY, AND LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE EACH COMPRISING SAME
LIQUID CRYSTALLINE COMPOUND HAVING NEGATIVE DIELECTRIC ANISOTROPY, AND LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE EACH COMPRISING SAME
General Access to <i>C</i>-Centered Radicals: Combining a Bioinspired Photocatalyst with Boronic Acids in Aqueous Media
作者:Maheshwerreddy Chilamari、Jacob R. Immel、Steven Bloom
DOI:10.1021/acscatal.0c03422
日期:2020.11.6
indispensable building blocks for modern synthetic chemistry. In recent years, visible light photoredox catalysis has become a promising avenue to access C-centered radicals from a broad array of latent functional groups, including boronic acids. Herein, we present an aqueous protocol wherein water features a starring role to help transform aliphatic, aromatic, and heteroaromatic boronic acids to C-centered
Combining flavin photocatalysis with parallel synthesis: a general platform to optimize peptides with non-proteinogenic amino acids
作者:Jacob R. Immel、Maheshwerreddy Chilamari、Steven Bloom
DOI:10.1039/d1sc02562g
日期:——
even test up to 96 single-NPAA peptide variants via the unique combination of boronic acids and a dehydroalanine residue in a peptide. We showcase the power of our newly minted platform to introduce NPAAs of diverse chemotypes-aliphatic, aromatic, heteroaromatic-directly into peptides, including 15 entirely newresidues, and to evolve a simple proteinogenic peptide into an unnatural inhibitor of thrombin
LIQUID CRYSTAL COMPOUND HAVING NEGATIVE DIELECTRIC ANISOTROPY, LIQUID CRYSTAL COMPOSITION USING THIS AND LIQUID CRYSTAL DISPLAY DEVICE
申请人:Shimada Teru
公开号:US20110272630A1
公开(公告)日:2011-11-10
The invention provides a liquid crystal compound having a suitable value of refractive index anisotropy, a suitable value of dielectric anisotropy, steep characteristics electro-optic characteristics, a wide temperature range of a nematic phase and an excellent compatibility with other liquid crystal compounds, and a liquid crystal compounds especially having a wide temperature range of a nematic phase.
A compound represented by formula (1).
For example, R
1
and R
2
are each independently alkyl having 1 to 9 carbons or alkenyl having 2 to 9 carbons, alkoxy having 1 to 8 carbons or alkenyloxy having 2 to 8 carbons; Q
1
and Q
4
are each independently fluorine or chlorine; Q
2
and Q
3
are each independently hydrogen, fluorine or chlorine, and one of Q
2
and Q
3
is hydrogen; Z is —CH
2
O— or —COO—; and h is 1 or 2.
Liquid crystal compound having negative dielectric anisotropy, liquid crystal composition using this and liquid crystal display device
申请人:JNC Corporation
公开号:US08298632B2
公开(公告)日:2012-10-30
The invention provides a liquid crystal compound having a suitable value of refractive index anisotropy, a suitable value of dielectric anisotropy, steep characteristics electro-optic characteristics, a wide temperature range of a nematic phase and an excellent compatibility with other liquid crystal compounds, and a liquid crystal compounds especially having a wide temperature range of a nematic phase.
A compound represented by formula (1).
For example, R1 and R2 are each independently alkyl having 1 to 9 carbons or alkenyl having 2 to 9 carbons, alkoxy having 1 to 8 carbons or alkenyloxy having 2 to 8 carbons; Q1 and Q4 are each independently fluorine or chlorine; Q2 and Q3 are each independently hydrogen, fluorine or chlorine, and one of Q2 and Q3 is hydrogen; Z is —CH2 O— or —COO—; and h is 1 or 2.
concise and efficient hydrodefluorination process was developed for the synthesis of gem-difluoroalkenes. This reaction employs rongalite as a masked proton source and does not require any additional catalysts or reductants. Notably, trifluoromethyl alkenes having both terminal and internal double bonds are compatible with this process, allowing for a wider range of substrates. The successful late-stage