Visible-Light-Photocatalyzed Reductions of N-Heterocyclic Nitroaryls to Anilines Utilizing Ascorbic Acid Reductant
作者:Aleksandar R. Todorov、Santeri Aikonen、Mikko Muuronen、Juho Helaja
DOI:10.1021/acs.orglett.9b01205
日期:2019.5.17
A photoreductive protocol utilizing [Ru(bpy)3]2+ photocatalyst, blue light LEDs, and ascorbic acid (AscH2) has been developed to reduce nitro N-heteroaryls to the corresponding anilines. Based on experimental and computational results and previous studies, we propose that the reaction proceeds via proton-coupled electron transfer between AscH2, photocatalyst, and the nitro N-heteroaryl. The method
已经开发出一种利用[Ru(bpy)3 ] 2+光催化剂,蓝光LED和抗坏血酸(AscH 2)的光还原方案,以将硝基N-杂芳基还原为相应的苯胺。根据实验和计算结果以及先前的研究,我们建议反应通过质子偶联的电子在AscH 2,光催化剂和硝基N-杂芳基之间转移而进行。该方法提供了一种绿色的催化程序,可以将例如4- / 8-硝基喹啉还原为相应的氨基喹啉,而后者是重要的抗疟疾药物中存在的亚结构。