7-N-(基基) 米托基因:循环化对药物功能的影响
Younghwa Na1, Shuang Wang, Harold Kohn
1Department of Chemistry, University of Houston, Houston, Texas 77204-5641, USA.
Journal of the American Chemical Society
|April 25, 2002
概括
新的方法成功地合成和表征了米托米C (MMC) 和皮罗米 (PFC) 硫醇. 醇的结构和稳定性取决于基连接剂,较长的连接剂促进自由醇的形成,而不是循环化或环激活.
科学领域:
- 药用化学 医学化学
- 有机化学 有机化学
- 药理学 药理学是指药理学的学科.
背景情况:
- 选择的米托米辛C (MMC) 氨基乙烯二硫化物显示出比MMC更好的药理学特征.
- 对于这些化合物提出的机制涉及7-N-(2-mercaptoethyl) mitomycin C (5) 的中间生成.
- 提5以前没有被分离或表征.
研究的目的:
- 开发高效的合成和表征线粒素 (孔粒素) C(7) 替代型硫醇的方法.
- 为了研究基连接剂成分对醇结构,稳定性和反应性的影响.
- 为了确定醇生成是否足以激活米托米辛环.
主要方法:
- 开发了两种合成途径:醇介导的二硫化物交换和醇的基介导裂变.
- 合成并选择了四种硫醇:7-N-(2-mercaptoethyl) mitomycin C (5),7-N-(2-mercaptoethyl) porfiromycin (12),7-N-(2-mercapto-2-methylpropyl) mitomycin C (13),以及7-N-(3-mercaptopropyl) porfiromycin (14).这些硫醇的合成和选择分别为7-N-(2-mercaptoethyl) mitomycin C (5),7-N-(2-mercaptoethyl) porfiromycin (12),7-N-(2-mercapto-2-methylpropyl) mitomycin C (13),以及7-N-(3-mercaptopropyl) porfiromycin (14).
- 使用HPLC,光谱学研究和醇捕获实验来表征醇.
主要成果:
- 成功合成并记录了硫醇的产生.
- 观察到醇5和12主要是由于在C(7) 位置的循环化而形成的循环异构体.
- 化或延伸链接物 (醇13和14) 增强了醇的稳定性,有利于自由醇的形成.
- 硫醇及其异构体的主要反应是二分化,没有证据表明产生了米托或阿齐里丁环开放.
结论:
- 仅仅醇生成不足以激活米托米辛环.
- 基连接剂成分显著影响醇结构,稳定性和反应性.
- 这些发现为MMC氨基乙烯二硫化物的潜在药理优势提供了洞察力.
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