High performance liquid chromatography and gas liquid chromatography have been used for the study of the stability of aminoethylcysteine-ketimine (AECK) in different experimental conditions. Concentration and acidic pH lead to the formation of the dimer of AECK which is very sensitive to temperature and is slowly converted to the corresponding decarboxylated dimer even at room temperature. In the presence of air at neutral and alkaline pH AECK is converted to an unknown compound having spectral characteristics similar to AECK and to other compounds not detectable by HPLC. Under nitrogen at neutral pH AECK is more stable and only undergoes the dimerization reaction to some extent.
DIMERIZATION AND OTHER CHANGES OF AMINOETHYLCYSTEINE KETIMINE / Pecci, Laura; A., Antonucci; R. M., Matarese; S. P., Solinas; Cavallini, Doriano. - In: PHYSIOLOGICAL CHEMISTRY AND PHYSICS AND MEDICAL NMR. - ISSN 0748-6642. - 23:4(1991), pp. 221-227.
DIMERIZATION AND OTHER CHANGES OF AMINOETHYLCYSTEINE KETIMINE
PECCI, Laura;CAVALLINI, Doriano
1991
Abstract
High performance liquid chromatography and gas liquid chromatography have been used for the study of the stability of aminoethylcysteine-ketimine (AECK) in different experimental conditions. Concentration and acidic pH lead to the formation of the dimer of AECK which is very sensitive to temperature and is slowly converted to the corresponding decarboxylated dimer even at room temperature. In the presence of air at neutral and alkaline pH AECK is converted to an unknown compound having spectral characteristics similar to AECK and to other compounds not detectable by HPLC. Under nitrogen at neutral pH AECK is more stable and only undergoes the dimerization reaction to some extent.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
