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Solid-phase Synthesis of [4.4] Spirocyclic Oximes
Published on: February 6, 2019
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通过尼古拉斯循环演化合成循环酸硫酸盐
Iaroslav A Kutuzov1, Ekaterina A Khmelevskaya1, Alexander F Khlebnikov1
1Institute of Chemistry, Saint Petersburg State University (SPbU), Saint Petersburg 199034, Russia. n.danilkina@spbu.ru.
Organic & biomolecular chemistry
|December 8, 2025
概括
尼古拉斯循环化提供了一个简单的路径,以循环octyne-sulfamates为应变促进的亚酸-酸循环添加 (SPAAC) 反应. 与融合的变种被证明是不稳定的,与它们的单环对应物不同.
科学领域:
- 有机化学 有机化学
- 点击 化学 点击 化学 .
- 化学合成 化学合成
背景情况:
- 应变促进的亚酸循环添加 (SPAAC) 是一种关键的生物结合技术.
- 赛克洛克丁衍生物是SPAAC的必需试剂.
- 开发新型,稳定和反应性cyclooctyne支架对于推动生物结合至关重要.
研究的目的:
- 探索尼古拉斯循环化作为循环甲硫酸盐的合成方法.
- 评估SPAAC中单环和烯融合的环氧硫酸盐的稳定性和反应性.
- 了解影响这些SPAAC试剂性能的结构和电子因素.
主要方法:
- 使用尼古拉斯循环法合成循环丁硫酸盐.
- 用于稳定和表征的CO2 (CO) 6复合物的制备.
- 通过对的去保护,可以产生自由的循环.
- 对SPAAC与甲酸反应的动力学研究.
- 密度函数理论 (DFT) 计算用于理论分析.
主要成果:
- 通过尼古拉斯循环化成功合成了单环和烯融合的循环甲基硫酸盐.
- 单环环氧硫酸 (SNO-Me2) 显示稳定性和高效的SPAAC反应性 (k = 0.0163 M-1 s-1).
- 与融合的类似物 (B-SNO,B-SNO-Me2) 呈现出动力不稳定性.
- DFT计算阐明了融合和甲基对稳定性和反应性的影响.
结论:
- 尼古拉斯循环是一种可行的方法,用于制备cyclooctyne-sulfamate SPAAC试剂.
- 由于其稳定性和反应性,单环环氧硫酸对SPAAC应用具有前景.
- 烯融合显著损害了这些循环氨酸衍生物的稳定性.
- 结构性修改,如propargylic甲基化影响SPAAC试剂的整体性能.
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