基于Pd和Cu的直角催化剂系统用于C和N-arylation的oxindoles
Ryan A Altman1, Alan M Hyde, Xiaohua Huang
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
和铜催化剂可实现未受保护的氧醇的选择性化. 是针对3位的,而铜仅限于原子,提供了不同的合成途径.
科学领域:
- 有机化学 有机化学
- 催化剂是一种催化剂.
- 合成方法论 合成方法论
背景情况:
- 氧化醇是有价值的异环化合物,具有多种应用.
- 开发选择性交叉合反应的oxindoles对于高效的合成至关重要.
- 在金属催化反应中控制化学选择性仍然是一个重大挑战.
研究的目的:
- 为了研究 (Pd) 和铜 (Cu) 催化剂系统在未受保护的氧醇的结合中的直角化学选择性.
- 阐明Pd-和Cu-催化C-H化反应中观察到的区域选择性的机制基础.
- 提供关于催化剂设计的见解,以针对氧化的功能化.
主要方法:
- 基于Pd-dialkylbiarylphosphine的催化剂系统的探索,用于氧二醇的化.
- 基于Cu-胺的催化剂系统的研究,用于氧二醇. arylation.
- 计算研究 (密度函数理论) 检查关键的催化中间体和反应途径.
主要成果:
- 在未受保护的氧醇的C3位置上选择性地发生了Pd催化的化.
- 催化式化仅对未受保护的氧化的原子提供了功能.
- 计算分析为控制直角化学选择性的因素提供了机械的见解.
结论:
- 通过使用不同的 Pd 和 Cu 催化剂系统,可以在氧化物化中实现正对角化学选择性.
- 金属催化剂的选择决定了化 (C3与N) 的位置.
- 了解机械细微差别,可以合理设计用于选择性氧化功能化的催化剂.
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