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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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Synthesis of substance P via its sulfoxide by the repetitive excess mixed anhydride (REMA) method

TL;DR: The N-protected heptapeptide sulfoxide corresponding to positions 5 to 11 inclusive of substance P was synthesized by the repetitive excess mixed anhydride (REMA) method (Scheme).
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Synthesis of racemic 3-methylphosphonate analogues of myo-inositol 3,4-bis- and 1,3,4-trisphosphate

TL;DR: The partially benzyl protected myo-inositol derivatives 11a and 11b were readily converted into the respective title compounds 18a and 18b by sequential methylphosphonylation, mild cleavage of the trans-prop-1-enyl group(s), phosphorylation and removal of all permanent benzyl protecting groups as mentioned in this paper.
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2-alkoxy-5 (4h) -oxazolones and the enantiomerization of n-alkoxycarbonylamino acids

TL;DR: In the presence of tert.amine (tertiary amine), most activated N-alkoxy-5(4H)-oxazolone is not chirally stable.
Journal ArticleDOI

Synthesis and Application of N‐Hydroxylamine Derivatives as Potential Replacements for HOBt

TL;DR: Albericio et al. as discussed by the authors presented an analysis of the relationship between organic chemistry and nanomedicine and showed that organic chemistry is a promising area of research in bioengineering.
Journal ArticleDOI

Solid-phase peptide synthesis in water. Part 3: A water-soluble N-protecting group, 2-[phenyl(methyl)sulfonio]ethoxycarbonyl tetrafluoroborate, and its application to solid phase peptide synthesis in water

TL;DR: In this paper, a water-soluble N-protecting group, 2-[phenyl(methyl)sulfonio]ethoxycarbonyl (Pms), was introduced to amino acids.
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