Triazolines. XXI: Preformulation Degradation Kinetics and Chemical Stability of a Novel Triazoline Anticonvulsant
作者:M.A. Freeke Hamelijnck、Paul J. Stevenson、Pankaja K. Kadaba、L.A. Damani
DOI:10.1002/jps.2600810421
日期:1992.4
The effect of pH, temperature, and two buffer species (citric acid-phosphate and bicarbonate-carbonate) on the stability of 1-(4-chlorophenyl)-5-(4-pyridyl)-delta 2-1,2,3-triazoline (ADD17014; 1), a novel triazoline anticonvulsant, was determined by HPLC. One of the main degradation products of 1 at pH 7.0 was isolated by TLC and identified as the aziridine derivative by MS. Investigations were carried
pH,温度和两种缓冲液种类(柠檬酸-磷酸盐和碳酸氢盐-碳酸盐)对1-(4-氯苯基)-5-(4-吡啶基)-δ2-1,2,3-稳定性的影响新型三唑啉抗惊厥药三唑啉(ADD17014; 1)通过HPLC测定。通过TLC分离pH 7.0时1的主要降解产物之一,并通过MS鉴定为氮丙啶衍生物。在23°C下在pH(2.2-10.7)和缓冲液浓度[离子强度(μ),0.25-4.18]的范围内进行了研究。降解遵循缓冲液催化的拟一级动力学,并通过pH降低,温度升高。在柠檬酸-磷酸盐缓冲液中降解的活化能(pH 7.0和恒定的离子强度mu为0.54)为12.5 kcal / mol。在pH 7时观察到一般的酸催化作用。在柠檬酸-磷酸盐缓冲液中为0。盐对降解的影响很好地遵循了改进的Debye-Hückel方程。但是,观察到的电荷乘积(ZAZB)值(2.69)与理论值(1.0)有很大差异,这可能是因为所用溶液的mu值较高(0