Cyclization-Activated Prodrugs: N-(Substituted 2-hydroxyphenyl and 2-hydroxypropyl)carbamates Based on Ring-Opened Derivatives of Active Benzoxazolones and Oxazolidinones as Mutual Prodrugs of Acetaminophen
作者:Alain Vigroux、Michel Bergon、Chantal Zedde
DOI:10.1021/jm00020a012
日期:1995.9
intermediates which cyclize at any pH to the corresponding oxazolidinone drugs. As opposed to model A, the rates of hydrolysis of mutual prodrugs of model B clearly exhibit a catalytic role of the plasma. It is concluded from the plasma studies that the carbamate substrates can be enzymatically transformed into potent electrophiles, i.e., isocyanates. In the case of the present study, the prodrugs are
分别合成了基于掩蔽的活性苯并恶唑酮(A型)和恶唑烷酮(B型)的N-(取代的2-羟苯基)-和N-(取代的2-羟丙基)氨基甲酸酯,并将其评估为潜在的药物递送系统。制备了一系列与模型A有关的烷基和芳基N-(5-氯-2-羟基苯基)氨基甲酸酯1。这些是骨骼肌松弛药氯唑沙宗的开放药物。相应的4-乙酰氨基苯甲酸酯,名为chlorzacetamol,是氯唑沙宗和对乙酰氨基酚的共同前药。通过将4-乙酰氨基苯基1,2,2,2-四氯乙基碳酸酯与适当的苯胺缩合,可在两步过程中获得氯苯乙胺和其他两种活性苯并恶唑酮和对乙酰氨基酚的互用前药。根据模型B,使用适当的胺类似地获得了对乙酰氨基酚和活性恶唑烷酮的两种互用前药(美他沙酮和美芬沙酮)。发现所有制备的氨基甲酸酯前药在水性(pH 6-11)和血浆(pH 7.4)介质中释放母体药物。在37度水介质中对前药1进行的详细机理研究表明,离去基团ROH的布朗斯台德型关系log t1