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Identifying the potential of pulsed LED irradiation in synthesis: copper-photocatalysed C–F functionalisation†
Chemical Communications ( IF 4.3 ) Pub Date : 2018-04-19 00:00:00 , DOI: 10.1039/c8cc02244e Thomas P. Nicholls 1, 2, 3, 4 , Johnathon C. Robertson 1, 2, 3, 4 , Michael G. Gardiner 1, 2, 3, 4 , Alex C. Bissember 1, 2, 3, 4
Chemical Communications ( IF 4.3 ) Pub Date : 2018-04-19 00:00:00 , DOI: 10.1039/c8cc02244e Thomas P. Nicholls 1, 2, 3, 4 , Johnathon C. Robertson 1, 2, 3, 4 , Michael G. Gardiner 1, 2, 3, 4 , Alex C. Bissember 1, 2, 3, 4
Affiliation
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It has been reported that pulsed irradiation can improve photosynthetic activity and phytochemical production in plants. Intrigued and inspired by these observations, we postulated that pulsed irradiation strategies may have broader implications in organic synthesis. We report here the results of a proof-of-concept study demonstrating that pulsed LED irradiation enhances the efficiency of a visible light-mediated photoredox-catalysed reaction. The design and construction of an inexpensive multiphase circuit (∼US$5) enabling power and pulse frequency modulation, which is connected to light-emitting diodes (LEDs), provides a source of pulsed visible light. This technology was then utilised to establish a novel copper-photocatalysed dual α-amino C–H/C–F functionalisation reaction. Pulsed blue LED irradiation was shown to be crucial for facilitating a much more efficient process and increasing the rate of product formation. Our results suggest that pulsed irradiation strategies have the potential to contribute to enhancing the synthetic utility and extending the scope of first row transition metal-based photoredox catalysts. We also anticipate that this approach will find wider applications in synthesis.
中文翻译：
识别脉冲LED辐射在合成中的潜力：铜光催化的CF功能†
据报道，脉冲辐照可以改善植物的光合作用活性和植物化学生产。这些观察结果引起了我们的兴趣和启发，我们推测脉冲辐照策略可能会对有机合成产生更广泛的影响。我们在这里报告概念验证研究的结果，证明脉冲LED辐射可增强可见光介导的光氧化还原催化反应的效率。一种廉价的多相电路（约合5美元）的设计和结构可实现功率和脉冲频率调制，并与发光二极管（LED）连接，可提供脉冲可见光源。然后，利用这项技术建立了一种新型的铜光催化的双重α-氨基C–H / C–F双官能化反应。脉冲蓝光LED辐射对于促进高效得多的过程和提高产品形成速率至关重要。我们的结果表明，脉冲辐照策略有可能有助于提高合成效用并扩展第一排过渡金属基光氧化还原催化剂的范围。我们还期望这种方法将在综合中找到更广泛的应用。
更新日期：2018-04-19
中文翻译：
识别脉冲LED辐射在合成中的潜力：铜光催化的CF功能†
据报道，脉冲辐照可以改善植物的光合作用活性和植物化学生产。这些观察结果引起了我们的兴趣和启发，我们推测脉冲辐照策略可能会对有机合成产生更广泛的影响。我们在这里报告概念验证研究的结果，证明脉冲LED辐射可增强可见光介导的光氧化还原催化反应的效率。一种廉价的多相电路（约合5美元）的设计和结构可实现功率和脉冲频率调制，并与发光二极管（LED）连接，可提供脉冲可见光源。然后，利用这项技术建立了一种新型的铜光催化的双重α-氨基C–H / C–F双官能化反应。脉冲蓝光LED辐射对于促进高效得多的过程和提高产品形成速率至关重要。我们的结果表明，脉冲辐照策略有可能有助于提高合成效用并扩展第一排过渡金属基光氧化还原催化剂的范围。我们还期望这种方法将在综合中找到更广泛的应用。
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