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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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Journal ArticleDOI

Mapping the X+1 binding site of the Grb2-SH2 domain with α,α-disubstituted cyclic α-amino acids

TL;DR: In this article, a series of phosphopeptides containing α,α-disubstituted cyclic α-amino acids (Ac n c, 3 ≤n≤ 7; n refers to the number of carbons in the ring) at the X + 1 position of Ac-Tyr(PO 3 H 2 )-X + 1 -Asn-NH 2 has been synthesized and their inhibitory activity as antagonists of the Grb2-SH2 domain has been determined in competitive binding assays.
Journal ArticleDOI

Spacer-separated sialyl LewisX cyclopeptide conjugates as potential E-selectin ligands.

TL;DR: Preliminary biological evaluation of the synthesized bivalent sialyl LewisX cyclopeptide conjugate showed only slightly enhanced inhibition of E-selectin binding in spite of the given flexibility of the two linked saccharide determinants.
Journal ArticleDOI

3-Hydroxy-4-oxo-3,4-dihydro-5-azabenzo-1,2,3-triazene†

TL;DR: Comparisons with related additives and coupling reagents showed that the new systems were sometimes more and sometimes less effective than previously described systems in the case of stepwise and segment couplings.
Book ChapterDOI

Synthesis of Amides and Related Compounds

TL;DR: The chemistry of amides has a long history, and since the end of the last century a plethora of synthetic methods has been developed as discussed by the authors, and a variety of methods have been proposed.
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