Synthesis and pH-dependent stability of purine-6-sulfenic acid, a putative reactive metabolite of 6-thiopurine
作者:R. T. Abraham、L. M. Benson、I. Jardine
DOI:10.1021/jm00364a031
日期:1983.10
hepatic cytochrome P-450 to an intermediate capable of binding to proteins by a mixed disulfide linkage. The identity of the active metabolite was postulated to be purine-6-sulfenic acid. In the present report, we describe the synthesis of the sulfenic acid derivatives of 6-thiopurine and two structurally similar compounds, 9-methyl-6-thiopurine and 4-mercapto-1H-pyrazolo[3,4-d]-pyrimidine. The unusual
先前的研究表明,6-硫嘌呤被肝细胞色素P-450代谢活化为能够通过混合二硫键与蛋白质结合的中间体。假定活性代谢物的身份为嘌呤-6-亚磺酸。在本报告中,我们描述了6-硫嘌呤和两个结构相似的化合物9-甲基-6-硫嘌呤和4-巯基-1H-吡唑并[3,4-d]-嘧啶的亚磺酸衍生物的合成。根据亚硫酸分解的歧化机理,介绍并解释了这些化合物在缓冲水性介质中异常的pH依赖性稳定性分布。用放射性标记的嘌呤-6-亚硫酸进行的研究表明,该物种直接与肝微粒体蛋白结合。