Material Safety Data Sheet Section 1. Identification of the substance Product Name: 4-Methoxy-2-nitrophenylboronic 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-Methoxy-2-nitrophenylboronic acid CAS number: 860034-09-9 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: C7H8BNO5 Molecular weight: 197.0 Section 10. Stability and reactivity Conditions to avoid: Heat, flames and sparks. Materials to avoid: Oxidizing agents. Possible hazardous combustion products: Carbon monoxide, nitrogen 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.
Development of potent macrocyclic inhibitors of genotype 3a HCV NS3/4A protease
摘要:
A series of macrocyclic compounds containing 2-substituted-quinoline moieties have been discovered and shown to exhibit excellent HCV NS3/4a genotype 3a and genotype 1b R155K mutant activity while maintaining the high rat liver exposure. Cyclization of the 2-substituted quinoline substituent led to a series of tricyclic P2 compounds which also display superb gt3a potency. (C) 2012 Elsevier Ltd. All rights reserved.
The copper-catalyzed hydroarylation of (trifluoromethyl)alkynes with (o-nitrophenyl)boronic acids selectively afforded trisubstituted (trifluoromethyl)alkenes bearing an o-nitrophenyl group. The obtained hydroarylation products were converted into 3-aryl-2-(trifluoromethyl)indoles in high yields via molybdenum-catalyzed Cadogan cyclization. Similarly, the hydroarylation product prepared from (o-ni
A class of macrocyclic compounds of formula (I), wherein R
1
, R
3
, R
4
, R
a
, R
b
, A, Z, Y, X, M, W, n and m are defined herein, that are useful as inhibitors of viral proteases, particularly the hepatitis C virus (HCV) NS3 protease, are provided. Also provided are processes 5 for the synthesis and use of such macrocyclic compounds for treating or preventing HCV infection. Formula (I):
A highly unsymmetrical trisubstituted tetraphenylene was designed and synthesized as a novel superamolecular scaffold for an unexpected trans-meso tetraphenylene macrocycle, whose structure was unequivocally characterized by an X-ray crystallographic analysis. With the defined and electron-rich aromatic cavity, this macrocycle could be further modified to be a potential host for organic cations with
设计并合成了一种高度不对称的三取代四亚苯基,作为一种用于意想不到的反式内消旋四亚苯基大环的新型超分子支架,其结构通过 X 射线晶体学分析得到明确表征。有了明确的和富含电子的芳香腔,这个大环可以进一步修饰成为具有生物学意义的有机阳离子的潜在宿主。
Nickel(II)-Promoted Amide N–H Arylation of Pyroglutamate–Histidine with Arylboronic Acid Reagents
作者:Kengo Hanaya、Mary K. Miller、Zachary T. Ball
DOI:10.1021/acs.orglett.9b00759
日期:2019.4.5
Small and simple bioorthogonal reactive handles that can be readily encoded by natural processes are important for bioconjugation. A rapid nickel-promoted N–H arylation of pyroglutamate–histidine sequences with 2-nitroarylboronic acids proceeds under mild aqueous conditions. Chemoselective activation of a lactam amide N–H within a peptide or protein provides a new approach to selective conjugation
A class of macrocyclic compounds of formula (I), wherein R1, R3, R4, Ra, Rb, A, Z, Y, X, M, W, n and m are defined herein, that are useful as inhibitors of viral proteases, particularly the hepatitis C virus (HCV) NS3 protease, are provided. Also provided are processes 5 for the synthesis and use of such macrocyclic compounds for treating or preventing HCV infection. Formula (I):