非甾体抗炎药的亚硝基衍生物似乎能够通过局部产生一氧化氮来保护胃黏膜免受非甾体抗炎药的毒性影响。通过伊布普洛芬与3-溴丙烷-1,2-二醇的缩合反应,随后经过银(I)催化亚硝基化反应,制备了伊布普洛芬和甘油-1-单硝酸酯的二酯化合物。使用乙腈-水(80%:20%)移动相,含有三氟乙酸(0.005%)的反相高效液相色谱法对该二酯化合物的伊布普洛芬释放进行了模拟胃液模型研究,并进行了直接分析。在这个模型中,正丙基伊布普洛芬在不同pH值下会发生不同程度的水解,pH值为5时水解微乎其微,而在pH值为3时,2小时内水解率达到52%。伊布普洛芬-甘油单硝酸酯二酯化合物在最强的模型水解条件下,研究期间水解率达到50%。这项研究表明,伊布普洛芬和甘油单硝酸酯的前药可以被制备出来,并且在模拟胃液中可能遇到的条件下,可以分解为母药。
非甾体抗炎药的亚硝基衍生物似乎能够通过局部产生一氧化氮来保护胃黏膜免受非甾体抗炎药的毒性影响。通过伊布普洛芬与3-溴丙烷-1,2-二醇的缩合反应,随后经过银(I)催化亚硝基化反应,制备了伊布普洛芬和甘油-1-单硝酸酯的二酯化合物。使用乙腈-水(80%:20%)移动相,含有三氟乙酸(0.005%)的反相高效液相色谱法对该二酯化合物的伊布普洛芬释放进行了模拟胃液模型研究,并进行了直接分析。在这个模型中,正丙基伊布普洛芬在不同pH值下会发生不同程度的水解,pH值为5时水解微乎其微,而在pH值为3时,2小时内水解率达到52%。伊布普洛芬-甘油单硝酸酯二酯化合物在最强的模型水解条件下,研究期间水解率达到50%。这项研究表明,伊布普洛芬和甘油单硝酸酯的前药可以被制备出来,并且在模拟胃液中可能遇到的条件下,可以分解为母药。
Nitroxylated derivatives of non-steroidal anti-inflammatory drugs appear to offer protection against the gastrotoxicity normally associated with non-steroidal anti-inflammatory drugs, ostensibly via local production of nitric oxide. A diester of ibuprofen and glycerol-1-mononitrate has been prepared via the condensation of ibuprofen with 3-bromopropan-1,2-diol, followed by silver-(I)-nitrate-mediated nitroxylation. The release of ibuprofen from this diester has been studied in a simulated gastric fluid model with direct analysis by reverse-phase HPLC, using an acetonitrile-water (80%:20%) mobile phase containing trifluoroacetic acid (0.005%). n-Propyl ibuprofen was found to undergo pH-dependent hydrolysis, ranging from negligible hydrolysis at pH 5 to 52% hydrolysis at pH 3, over a 2-h period in this model. The ibuprofen-glycerol mononitrate diester was subjected to the most vigorous model hydrolytic conditions and was found to undergo 50% hydrolysis during the study period. This study shows that pro-drugs of ibuprofen and glycerol mononitrate can be obtained, and can undergo degradation to the parent drugs under conditions simulating those likely to be encountered in the stomach.
非甾体抗炎药的亚硝基衍生物似乎能够通过局部产生一氧化氮来保护胃黏膜免受非甾体抗炎药的毒性影响。通过伊布普洛芬与3-溴丙烷-1,2-二醇的缩合反应,随后经过银(I)催化亚硝基化反应,制备了伊布普洛芬和甘油-1-单硝酸酯的二酯化合物。使用乙腈-水(80%:20%)移动相,含有三氟乙酸(0.005%)的反相高效液相色谱法对该二酯化合物的伊布普洛芬释放进行了模拟胃液模型研究,并进行了直接分析。在这个模型中,正丙基伊布普洛芬在不同pH值下会发生不同程度的水解,pH值为5时水解微乎其微,而在pH值为3时,2小时内水解率达到52%。伊布普洛芬-甘油单硝酸酯二酯化合物在最强的模型水解条件下,研究期间水解率达到50%。这项研究表明,伊布普洛芬和甘油单硝酸酯的前药可以被制备出来,并且在模拟胃液中可能遇到的条件下,可以分解为母药。