鲁二) 催化化辅助的C-H键功能化以及同时发生的 (4 + 2) 无效化
Anindita Sarkar1, Moumita Saha1, Asish R Das1
1Department of Chemistry, University of Calcutta, Kolkata 700009, India. ardas66@rediffmail.com.
Organic & biomolecular chemistry
|June 26, 2023
概括
这项研究引入了新的Ru(II) 催化C-H激活方法,用于使用易于获得的试剂合成复杂的氨酸化和其他异环. 开发的协议为多样化,潜在的光和生物相关分子提供了有效的路线.
科学领域:
- 有机合成 有机合成
- 催化剂是一种催化剂.
- 异环化学 异环化学
背景情况:
- 开发复杂的异环基架的高效合成路径仍然是有机化学的一个重大挑战.
- 金属催化C-H激活为简化合成途径和访问新型分子架构提供了强大的策略.
- 库马林和胺衍生物在生物活性化合物和功能材料中普遍存在.
研究的目的:
- 建立高效的Ru (II) 催化协议,通过乙烯基C (sp2) -H键激活合成氨酸化里核.
- 探索N-甲氧化碳胺作为C-H功能化和取消反应的指导组的实用性.
- 扩大合成多种异环的方法,包括quinazolines,isoxazoles和pyridone-N-oxides,并研究它们的特性.
主要方法:
- 催化C(sp2)-H激活使用N-甲氧化碳胺作为化导向组的-3-碳胺.
- 使用硫化和化作为碳替代物的碳插入反应.
- 使用sp2-N定向组扩展C-H激活到各种异环的正交C-sp2-H键.
主要成果:
- 成功合成具有结构特权的π-扩展氨酸化化原子核.
- 多种异环的形成,包括乙基化/基化奎纳素,异醇和光胺-N-氧化物.
- 展示了一种单双C-H激活,产生与胺醇融合的多环异烯和pyridones的化学选择性晚期功能化.
- 鉴定一种皮里-N-氧化物衍生物,在Al3+离子的存在下表现出选择性光火.
结论:
- 开发的Ru (II) 催化C-H激活和取消策略提供了对复杂的异环化合物的高效和多功能访问.
- 约化介导途径被认为是一种优越的方法,因为它的效率和更广泛的适用性.
- 合成的异环,特别是胺-N-氧化物,显示出在传感和材料科学中的应用潜力.
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