Material Safety Data Sheet Section 1. Identification of the substance Product Name: Boc-Met-Leu-Phe-OH Synonyms: Section 2. Hazards identification Harmful by inhalation, in contact with skin, and if swallowed. Section 3. Composition/information on ingredients. Ingredient name: Boc-Met-Leu-Phe-OH CAS number: 67247-12-5 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: C25H39N3O6S Molecular weight: 509.7 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, 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.
Chemo-Enzymatic Synthesis of Fmoc-Peptide Fragments
摘要:
Optically pure Fmoc-peptide fragments have been prepared via dicyclohexylcarbodiimide coupling of N-protected amino acids with amino acid esters, followed by enzyme-catalyzed ester hydrolysis by alcalase with a high concentration of organic solvent in a high yield.
Phase-transfer reagents as C-terminal protecting groups; facile incorporation of free amino acids or peptides into peptide sequences
作者:Shui-Tein Chen、Kung-Tsung Wang
DOI:10.1039/c39900001045
日期:——
Phase-transfer reagents (basic, neutral, and acidic) can effect temporary protection of carboxy groups by salt formation in C-terminal free amino acids or peptides during peptide synthesis; the use of acidic or neutral phase-transfer reagents as the C-terminal protecting group will not affect the nucleophilicity of the amino group of the salts thus prepared in an organic solvent.
Efficient preparation of chiral diamines via Red-Al reduction of N-Boc-protected amino acid-derived secondary amides
作者:Eric A. Voight、Matthew S. Bodenstein、Norihiro Ikemoto、Michael H. Kress
DOI:10.1016/j.tetlet.2006.01.056
日期:2006.3
reduction of N-Boc-protected amino acid-derived secondary amides, avoiding the formation of overreduction and cyclic urea byproducts. The method is showcased by the efficient formal synthesis of NK-1antagonistLY303870.
Stereoselective Oxidative Bioconjugation of Amino Acids and Oligopeptides to Aldehydes
作者:Henriette N. Tobiesen、Lars A. Leth、Marc V. Iversen、Line Næsborg、Søren Bertelsen、Karl Anker Jørgensen
DOI:10.1002/anie.202008513
日期:2020.10.12
stereoselective, near‐equimolar, and metal‐free oxidative bioconjugation of amino acids and oligopeptides to aldehydes is presented. Based on a newly developed organocatalytic oxidative concept, the C‐terminal and side‐chain carboxylicacid functionalities of amino acids and oligopeptides are shown to couple in a stereoselective manner to α‐branched aldehydes catalyzed by a chiral primary amine and a quinone as
COMPOSITIONS AND METHODS FOR THE TREATMENT OF FUNGAL INFECTIONS
申请人:CIDARA THERAPEUTICS, INC
公开号:US20160213742A1
公开(公告)日:2016-07-28
Compositions and methods for the treatment of fungal infections including compounds containing a pathogen pattern recognition receptor ligand and a β 1,3-glucan synthase inhibitor are disclosed. In particular, compounds containing a lipopeptide moiety and a formyl peptide receptor ligand can be used in the treatment of fungal infections caused by a fungus of the genus
Aspergillus
or
Candida.
Chemo-Enzymatic Synthesis of Optically Active Amino Acids and Peptides
作者:Shui-Tein Chen、Kung-Tsung Wang
DOI:10.1002/jccs.199900046
日期:1999.6
AbstractThe industrial alkaline protease, alcalase, is stable and active in a high concentration of organic solvents and useful as a biocatalyst for (i) diastereoselective hydrolysis of peptide esters and preparation of racemization‐free peptides; (ii) selective incorporation of esters of D‐amino acid into peptides in t‐butanol via a selective hydrolysis of esters of D,L‐amino acid, followed by using the unhydrolyzed D‐esters as a nucleophile in a kinetically controlled peptide bond formation; (iii) resolution of esters of amino acid in 95% t‐butanol/5% water, followed by saponification of the unreacted esters to offer both enantiomers with high yield and optical purity; (iv) completely resolve amino‐acid esters with high yield and optical purity via in situ racemization of the unreacted antipode catalyzed by pyridoxal 5‐phosphate; (v) cryobioorganic synthesis of peptides with increased yields 15%–40% of peptide bond formation by reaction at 5 °C instead of 25–30 °C of a kinetically controlled enzymatic reaction in alcohols.