Synthesis Of Ethyl Esters Research Articles

Synthesis of ethyl esters of NTA, EDTA, DTPA and pyridine-2,6-dicarboxylic acid using the diethyl ester of pyrocarbonic acid

AbstractDie Äthylester von NTA, ÄDTA, DTPA und Pyridin‐2,6‐dicarbonsäure lassen sich mit Hilfe von Pyrokohlensäurediäthylester in guten Ausbeuten darstellen. Die IR‐Spektren wurden aufgenommen.

Investigations in the field of pyridinenarboxylic acids II. Gas-liquid chromatography of carboxylic acids of the pyridine series and their amides

1. The synthesis of ethyl esters and amides ofα-picolinic, nicotinic, isonicotinic, quinolinic, isocinchomeronic, and dipicolinic acids was developed. 2. A gas-liquid Chromatographie analysis of pyridinecarboxylic acids in the form of their ethyl esters, and that of the amides of pyridinecarboxylic acids in the form of their nitriles by preliminary rapid phosgenization of the amides of the corresponding nitriles, was developed.

The synthesis of glyconyl peptides

Using N,N′-dicyclohexylcarbodiimide as a coupling agent, the present study reports the successful synthesis of pentaacetyl d-gluconyl glycine ethyl ester, pentaacetyl d-gluconyl glycylglycine ethyl ester, pentaacetyl d-gluconyl tyrosine ethyl ester, pentaacetyl d-galactonyl glycine ethyl ester, and pentaacetyl d-galactonyl tyrosine ethyl ester. In addition, in a one-step reaction, d-gluconyl glycine ethyl ester, d-gluconyl glycylglycine ethyl ester, and d-galactonyl glycine ethyl ester were prepared. The latter two glyconyl peptides have not been reported previously.