Kinetics and chemistry of the polycondensation of ?-amino esters Communication 7. Kinetics of the change in the composition of the products of the polycondensation of glycine ethyl ester in presence of N-carboxyglycine anhydride

1958 ◽  
Vol 7 (12) ◽  
pp. 1378-1383
Author(s):  
K. T. Poroshin ◽  
Iu. I. Khurgin ◽  
N. I. Prokhorova
Keyword(s):  
Ethyl Ester ◽  
Amino Esters ◽  
Glycine Ethyl Ester ◽  
Kinetics Of

scholarly journals Some metabolites of 1-bromobutane in the rabbit and the rat

1968 ◽  
Vol 109 (5) ◽  
pp. 727-736 ◽  
Author(s):  
Sybil P. James ◽  
D. A. Jeffery ◽  
Rosemary H. Waring ◽  
P. B. Wood
Keyword(s):  
Lactic Acid ◽  
Ethyl Ester ◽  
Rat Liver ◽  
Hydroxy Acid ◽  
Rabbit Liver ◽  
Mercapturic Acid ◽  
Acid Form ◽  
Rat Urine ◽  
Glycine Ethyl Ester

1. Rabbits and rats dosed with 1-bromobutane excrete in urine, in addition to butylmercapturic acid, (2-hydroxybutyl)mercapturic acid, (3-hydroxybutyl)mercapturic acid and 3-(butylthio)lactic acid. 2. Although both species excrete both the hydroxybutylmercapturic acids, only traces of the 2-isomer are excreted by the rabbit. The 3-isomer has been isolated from rabbit urine as the dicyclohexylammonium salt. 3. 3-(Butylthio)lactic acid is formed more readily in the rabbit; only traces are excreted by the rat. 4. Traces of the sulphoxide of butylmercapturic acid have been found in rat urine but not in rabbit urine. 5. In the rabbit about 14% and in the rat about 22% of the dose of 1-bromobutane is excreted in the form of the hydroxymercapturic acids. 6. Slices of rat liver incubated with S-butylcysteine or butylmercapturic acid form both (2-hydroxybutyl)mercapturic acid and (3-hydroxybutyl)mercapturic acid, but only the 3-hydroxy acid is formed by slices of rabbit liver. 7. S-Butylglutathione, S-butylcysteinylglycine and S-butylcysteine are excreted in bile by rats dosed with 1-bromobutane. 8. Rabbits and rats dosed with 1,2-epoxybutane excrete (2-hydroxybutyl)mercapturic acid to the extent of about 4% and 11% of the dose respectively. 9. The following have been synthesized: N-acetyl-S-(2-hydroxybutyl)-l-cysteine [(2-hydroxybutyl)mercapturic acid] and N-acetyl-S-(3-hydroxybutyl)-l-cysteine [(3-hydroxybutyl)mercapturic acid] isolated as dicyclohexylammonium salts, N-toluene-p-sulphonyl-S-(2-hydroxybutyl)-l-cysteine, S-butylglutathione and N-acetyl-S-butylcysteinyl-glycine ethyl ester.

Iron-Catalyzed Cyclopropanation with Glycine Ethyl Ester Hydrochloride in Water

2012 ◽  
Vol 14 (8) ◽  
pp. 2162-2163 ◽  
Author(s):  
Bill Morandi ◽  
Amund Dolva ◽  
E. M. Carreira
Keyword(s):  
Ethyl Ester ◽  
Ester Hydrochloride ◽  
Glycine Ethyl Ester

Kinetics of reactions of acyl isothiocyanates with amines

1980 ◽  
Vol 45 (8) ◽  
pp. 2334-2342 ◽  
Author(s):  
Ján Imrich ◽  
Pavol Kristian ◽  
Dušan Podhradský ◽  
Milan Dzurilla
Keyword(s):  
Solvent Polarity ◽  
Uv Spectra ◽  
Spectroscopic Methods ◽  
Stopped Flow ◽  
Analogous Reaction ◽  
Reaction Products ◽  
Experimental Conditions ◽  
Glycine Ethyl Ester ◽  
Nucleophilic Reagents ◽  
Kinetics Of

The kinetics of reactions of 4-substituted benzoyl, cinnamoyl and phenyl isothiocyanates with aliphatic amines and glycine ethyl ester in organic solvents was studied by the stopped-flow and UV spectroscopic methods. The reaction of acyl isothiocyanates with the nucleophilic reagents employed proved to be 103 - 104 times faster than analogous reaction of phenyl isothiocyanates. A linear correlation between logk and σp constants with positive ρ slope was found. The solvent polarity has only a negligible effect on the reaction. UV spectra as well as gas chromatography of the reaction products proved that under the employed experimental conditions N,N'-disubstituted thioureas are the sole reaction products.

Ion beam analysis of the imidization kinetics of polyamic ethyl ester

Polymer ◽  
1990 ◽  
Vol 31 (3) ◽  
pp. 520-523 ◽  
Author(s):  
S.F. Tead ◽  
E.J. Kramer ◽  
T.P. Russell ◽  
W. Volksen
Keyword(s):  
Ethyl Ester ◽  
Ion Beam ◽  
Ion Beam Analysis ◽  
Beam Analysis ◽  
Kinetics Of
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