Browsing by Author "El Naggar, A. M. [احمد محمد النجار]"
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Copper Complexes Of Di-, Tri-, And Tetra-Peptides Containing Tryptophan, Histidine And Arginine
El Naggar, A. M. [احمد محمد النجار]; El-Ghaffar, S. A. A.; Zaher, M. R. ( Qatar University , 1983 , Article)Fifty Seven copper complexes of di-, tri-. and tetra-peptides containing tryptophan, histidine and arginine are studied spectrophotometrically. The ^a, and colour of the complexes are dependent on the sequence of the amino ... -
Synthesis And Biological Activity Of Some New 4-(Aminoacyl) Aminopyridines And 2-(Aminoacyl) Aminopyrimidine Derivatives
El Naggar, A. M. [احمد محمد النجار]; Ahmed, F. S. M.; El-Salam, A. M Abd; Latif, M. S. A.; El-Bary, H. M. Abd ( Qatar University , 1983 , Article)The synthesis of 4-(N-Tos and N-Pht-aminoacyI) aminopyridines (III - XIV) and 2-(N-Pht-aminoacyl)-aminopyriniidines (XV-XXIV) has been achieved employing the acid chloride and carbodiimide methods. Hydrazinolysis of ...