8.52346

Fmoc-Sec(pMeOBzl)-OH

≥98.0% (HPLC), for peptide synthesis, Novabiochem^®

• Synonym(e): Fmoc-Sec(Mob)-OH,Fmoc-S-4-methoxybenzyl selenocysteine
• Empirische Formel (Hill-System): C₂₆H₂₅NO₅Se
• CAS-Nummer: 150308-80-8
• Molekulargewicht: 510.44
• UNSPSC-Code: 12352209
• NACRES: NA.22

Eigenschaften

• product name: Fmoc-Sec(pMeOBzl)-OH, Novabiochem^®
• Qualitätsniveau: 200
• Produktlinie: Novabiochem^®
• Assay: ≥98% (TLC); ≥98.0% (HPLC)
• Form: powder
• Eignung der Reaktion: reaction type: Fmoc solid-phase peptide synthesis
• Hersteller/Markenname: Novabiochem^®
• Anwendung(en): peptide synthesis
• Funktionelle Gruppe: Fmoc
• Lagertemp.: 2-8°C
• InChI: 1S/C26H25NO5Se/c1-31-18-12-10-17(11-13-18)15-33-16-24(25(28)29)27-26(30)32-14-23-21-8-4-2-6-19(21)20-7-3-5-9-22(20)23/h2-13,23-24H,14-16H2,1H3,(H,27,30)(H,28,29)/t24-/m0/s1
• InChIKey: XCPAYIZRJRMXBI-DEOSSOPVSA-N

Beschreibung

Allgemeine Beschreibung

Building block for the introduction of selenocysteine during Fmoc SPPS ^[1,2,3]. Selenocysteine derivatives can undergo enantiomerization during coupling and can form dehydroalanine and β-piperidinylalanine containing side products during subsequent chain elongation ^[3]. Therefore, activation methods, such as HBTU or PyBOP which involve the addition of a tertiary, base should be avoided for addition of the Sec and all subsequent residues. Cleavage and side-chain deprotection of Sec-containing peptides can be effected using tFA-m-cresol-thioanisole-EDT-water (80:5:5:5:5)^[2] or TFA-water-DCM-TIS (89:5:51) at 4 °C ^[3]. As the Se-pMeOBzl bond is stable to TFA, these methods result in the formation of the corresponding Sev(pMeOBzl) peptide. Peptides containing two Sec(pMeOBzl) residues can be oxidized directly to the corresponding selenocystinyl peptides by treatment with 5-10% DMSO in TFA ^[1-3].

Associated Protocols and Technical Articles
Cleavage and Deprotection Protocols for Fmoc SPPS

Literature references

^[1] T. Koide, et al. (1993) Chem. Pharm. Bull., 41, 502.
^[2] T. Koide, et al. (1993) Chem. Pharm. Bull., 41, 1596.
^[3] D. Besse & L. Moroder (1997) J. Peptide Sci., 3, 442.

Hinweis zur Analyse

Farbe (visuell): weiß bis gelb bis beige
Aussehen der Substanz (visuell): Pulver
Identität (IR): entspricht
Enantiomerenreinheit: ≥ 99.5 % (a/a)
Reinheit (DC(157A)): ≥ 98 %
Gehalt (HPLC, Fl.%): ≥ 98.0 % (a/a)
Löslichkeit (1 mmol in 2 ml DMF): klar löslich
DC-Bedingungen gemäß den Angaben unseres Hauptkataloges

Rechtliche Hinweise

Novabiochem is a registered trademark of Merck KGaA, Darmstadt, Germany

Sicherheitshinweise

• Piktogramme: GHS06,GHS08,GHS09
• Signalwort: Danger
• H-Sätze: H301 + H331 - H315 - H335 - H373 - H410
• P-Sätze: P260 - P273 - P301 + P310 - P302 + P352 - P304 + P340 + P311 - P314
• Gefahreneinstufungen: Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Skin Irrit. 2 - STOT RE 2 - STOT SE 3
• Zielorgane: Respiratory system
• Lagerklassenschlüssel: 6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• WGK: WGK 3
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable