Linear polypeptides of a known repeating sequence of amino-acids. Synthesis of poly-(L-tyrosyl-L-glutamyl-L-valylglycyl)[1-14C]glycine ethyl ester

1970 ◽  
pp. 2247 ◽  
Author(s):  
Brian J. Johnson ◽  
Elwood G. Trask
Keyword(s):  
Amino Acids ◽  
Ethyl Ester ◽  
Glycine Ethyl Ester

Synthesis of amino acids. Alkylation of aldimine and ketimine derivatives of glycine ethyl ester under various phase-transfer conditions

1982 ◽  
Vol 23 (41) ◽  
pp. 4255-4258 ◽  
Author(s):  
Léon Ghosez ◽  
Jean-Pierre Antoine ◽  
Etienne Deffense ◽  
Mirtha Navarro ◽  
Valery Libert ◽  
...  
Keyword(s):  
Amino Acids ◽  
Ethyl Ester ◽  
Phase Transfer ◽  
Glycine Ethyl Ester ◽  
Derivatives Of

Synthesis of Some New Furocoumarins and their Usage in Peptide Synthesis

2003 ◽  
Vol 58 (12) ◽  
pp. 1237-1241 ◽  
Author(s):  
Eman M. Keshk ◽  
Emad M. El-Telbani ◽  
H. Abdel-Rahman
Keyword(s):  
Amino Acids ◽  
Acetic Acid ◽  
Ethyl Ester ◽  
Peptide Synthesis ◽  
Ethyl Cyanoacetate ◽  
Acid Ethyl Ester ◽  
Glycine Ethyl Ester

1,5-Benzodiazepin-2-ones (3a - d) were obtained fromω-carbethoxy visnaginone or ω-carbethoxy khellinone and substituted 1,2-phenylenediamines. Reactions of active nitriles such as malononitrile and ethyl cyanoacetate with substituted 6-dimethylaminomethylene furocoumarins (4a,b) are described. Additionally, reaction of substituted 6-dimethylaminomethylene furocoumarins with different amino acids gave furochromen-6-ylidenemethyl amino acids (7 - 9). Compound 7 was coupled with glycine ethyl ester to form amino acetic acid ethyl ester (10).

scholarly journals Studies on Chitin II. Reaction of N-Acetyl-D-Glucosamine With a-Amino Acids, Peptides, and Proteins

1955 ◽  
Vol 8 (1) ◽  
pp. 83 ◽  
Author(s):  
RH Hackman
Keyword(s):  
Amino Acids ◽  
Ethyl Ester ◽  
Equilibrium Dialysis ◽  
Equilibrium Constants ◽  
Amino Nitrogen ◽  
Cuticular Proteins ◽  
Alkaline Conditions ◽  
Acidic Conditions ◽  
Glycine Ethyl Ester ◽  
Ph Range

The reaction of N-acetyl-D-glucosamine with a-amino acids, peptides, and proteins has been investigated. The course of the reaction has been followed by methods which involved the use of paper partition chromatography, polarimetric measurements, measurement of pH depression, and equilibrium dialysis. It is considered that products of the Schiff base (or azomethine) type are formed but the combination is unstable and is split even in the biological pH range. No reaction occurs under acidic conditions but ~der alkaline conditions the amount of reaction increases with the pH. At a given pH the percentage combination depends upon the equilibrium constant of the reaction and upon the dissociation constant of the a-amino nitrogen, as this determines the initial concentration of the reagent. Differences in the degrees of ionization are more important in determining the percentage combination than are the differences in the equilibrium constants. The reaction is of a similar type to that which occurs between glucose and a-amino acids or peptides. Tyrosine, as well as free a-amino groups, appears to play an important part in the binding of N-acetyl-D-glucosamine by insect cuticular proteins. 2-Acetamido-2-deoxyN'- D-glucosylglycine ethyl ester has been synthesized from N-acetyl-D-glucosamine and glycine ethyl ester and its properties have been investigatd.

Sign in / Sign up

Export Citation Format

Share Document