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Journal ArticleDOI

Eine neue Methode zur Synthese von Peptiden: Aktivierung der Carboxylgruppe mit Dicyclohexylcarbodiimid unter Zusatz von 1‐Hydroxy‐benzotriazolen

Wolfgang König, +1 more
- 01 Mar 1970 - 
- Vol. 103, Iss: 3, pp 788-798
TLDR
In this article, the authors show that 1-Hydroxy-benzotriazol and 1-hydroxy-acetyl carbodiimid-methode eignen sich als Zusatze bei der Dicyclohexylcarbodiimids-Methode zur Synthese von Peptiden, verhindern die N-Acyl-harnstoffbildung and fuhren in hoher Ausbeute.
Abstract
1-Hydroxy-benzotriazol sowie verschiedene kernsubstituierte 1-Hydroxy-benzotriazole eignen sich als Zusatze bei der Dicyclohexylcarbodiimid-Methode zur Synthese von Peptiden. Ihr Einflus auf die Racemisierung bei Peptidsynthesen wurde unter Anwendung des gaschromatographischen Racemisierungstests von Weygand u. Mitarbb.2) untersucht. Die neuen Zusatze senken die Racemisierung, verhindern die N-Acyl-harnstoffbildung und fuhren in hoher Ausbeute zu sehr reinen Peptiden.

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Citations
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Determining the occurrence of a 3(10)-helix and an alpha-helix in two different segments of a lipopeptaibol antibiotic using TOAC, a nitroxide spin-labeled C(alpha)-tetrasubstituted alpha-aminoacid.

TL;DR: It is concluded that the secondary structure in solution remains essentially unchanged if compared to that previously found in the crystal state for trichogin, while the N-terminal region of the peptide folds in a 3(10)-helix, which is mainly alpha-helical.
Journal ArticleDOI

Peptide synthesis beyond DMF: THF and ACN as excellent and friendlier alternatives

TL;DR: THF and ACN are demonstrated to have a better coupling efficiency than DMF in the solid-phase peptide synthesis of hindered peptides and in combination with a complete polyethylene glycol resin (ChemMatrix).
Journal ArticleDOI

Platinum Porphyrins as Phosphorescent Label for Time-resolved Microscopy:

TL;DR: Applications of time-resolved detection of phosphorescent porphyrins in strongly autofluorescent material (histological sections) are discussed.
Journal ArticleDOI

Supramolecular dendrimer chemistry: using dendritic crown ethers to reversibly generate functional assemblies

TL;DR: In this article, a series of crown ether derivatives functionalised with dendritic branching based on l -lysine repeat units has been synthesised, and the ability of these receptors to interact with cationic guests has been investigated using NMR and mass spectrometric techniques.
Journal ArticleDOI

2-Methyltetrahydrofuran and cyclopentyl methyl ether for green solid-phase peptide synthesis

TL;DR: The use of 2-MeTHF with combination of DIC/OxymaPure gave the lowest racemization level during stepwise synthesis of Z-Phg-Pro-NH2 and the highest purity during SPPS of Aib-enkephalin pentapeptide.
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