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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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A new silyl linker for reverse-direction solid-phase peptide synthesis

TL;DR: In this paper, a free amino acid ester is treated with CO 2 followed by exposure to a chlorosilane-containing polystyrene, which results in its attachment to the solid support.
Journal ArticleDOI

Investigation of the diastereoisomeric association complex for the separation of amino acid enantiomers on optically active stationary phases

TL;DR: In this article, an N-acyl-amino acid n-alkyl amide (N-caproyl-L-valine n-hexyl amides) was synthesized, which fulfills the general requirements for the reversible association between the enantiomers and the asymmetric solvent molecules.
Journal Article

Amino acid derivatives. Part I. Synthesis, antiviral and antitumor evaluation of new alpha-amino acid esters bearing coumarin side chain.

TL;DR: A series of amino acid esters bearing coumarin were synthesized and evaluated, in vitro, against HIV-1, and bovine viral diarrhea virus (BVDV) and exhibited activity against leukaemia (MT4) with CC50 = 24 micromol L(-1).
Journal ArticleDOI

Cyclization studies with a model pentapeptide

TL;DR: Results of cyclization experiments carried out with a pentapeptide with the sequence Gly-Ala-D-Val-Leu-Ile suggest that separation of the steps of activation and coupling is preferable to cyclization with the help of coupling reagents.
Journal ArticleDOI

Synthesis of an insulin-like compound consisting of the A chain of insulin and a B chain corresponding to the B domain of human insulin-like growth factor I.

TL;DR: An insulin-like hybrid molecule consisting of the A chain of insulin and a B chain corresponding to the B domain of human insulin- like growth factor I (growth factor I sequence 1-30) has been synthesized essentially by the procedures developed in this laboratory for the synthesis of insulinand analogues.
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