Alkylation of 6-Mercaptopurine (6-MP) with N-Alkyl-N-alkoxycarbonyl)aminomethyl Chlorides: S6-(N-Alkyl-N-alkoxycarbonyl)aminomethyl-6-MP Prodrug Structure Effect on the Dermal Delivery of 6-MP
作者:Kevin G. Siver、Kenneth B. Sloan
DOI:10.1002/jps.2600790116
日期:1990.1
6-CARB-6-MP prodrugs were significantly greater than the solubility of 6-MP in IPM but only one prodrug (5) was apparently even as soluble as 6-MP in water. Selected 6-CARB-6-MP prodrugs were examined in diffusion cell experiments. Only the N-methyl-N-methoxycarbonyl derivative 5 gave a steady-state rate of delivery of 6-MP from IPM that was significantly greater than the steady-state rate of delivery of 6-MP
S6-(N-烷基-N-烷氧基羰基)氨基甲基-6-MP(6-CARB-6-MP)前药5-20是由6-MP与N-烷基-N-烷氧基羰基氨基甲基氯化物反应合成的(4 )在二甲亚砜中的总收率是5-62%,具体取决于所涉及的N-烷基和烷氧基。通过光谱和微量分析对衍生物进行了充分表征。取代模式为S6-烷基的分配是基于UV,1H NMR和13C NMR光谱与模型化合物的比较。由2当量的4与6-MP的反应获得S6,9-双烷基衍生物,但是产物不稳定并且静置时分解成9-烷基衍生物。6-CARB-6-MP前药在速率确定步骤的过渡状态下通过SN1型机制在水中还原为6-MP,该机制涉及单分子电荷分离。真皮酶对水解速率没有影响。所有6-CARB-6-MP前药在肉豆蔻酸异丙酯(IPM)中的溶解度均明显高于6-MP在IPM中的溶解度,但显然只有一种前药(5)甚至与6-MP一样可溶于水。在扩散池实验中检查了选定的6-CARB