Reaktion a: (3) wurde nach Vogel et al.1'-31 rnit n-Butyllithium in die Dilithiumverbindung (wasserfreier Et20, -20 bis O"C, N,) umgewandelt, aus der sich durch Metallaustausch rnit wasserfreiem MgBr2 die bifunktionelle Grignard-Verbindung gewinnen lien. Setzte man diese bei 0 Β°C mit frisch bereitet
1H-NMR Investigations on the Mutarotation of N-Acetyl-D-neuraminic Acid
β Scribed by Prof. Dr. Horst Friebolin; Dr. Martin Supp; Prof. Dr. Reinhard Brossmer; Dr. Gunda Keilich; Dr. Dietmar Ziegler
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 247 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0044-8249
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Integration between the alkaline epimerization of N-acetyl-D-glucosamine (GlcNAc) to N-Acetyl-Dmannosamine (ManNAc) and the N-acetyl-D-neuraminic acid (Neu5Ac) aldolase-catalyzed biotransformation has been assessed experimentally. GlcNAc epimerization took place above pH 9.0, and the initial rate of
The interaction of two DNA octamers, d(m 5 CG) 4 and d(GGAATTCC), with the polyamines spermine 4Ο© and spermidine 3Ο© , has been studied by means of 1 H-nmr nuclear Overhauser effect (NOE) difference measurements. The experiments were performed at 10Β°C and for a polyamine charge to DNA charge (i.e., p
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