Helquats as Promoters of the Povarov Reaction: Synthesis of 1,2,3,4‐Tetrahydroquinoline Scaffolds Catalyzed by Helicene‐Viologen Hybrids
作者:Paul E. Reyes‐Gutiérrez、Tynchtyk T. Amatov、Pavel Švec、Ivana Císařová、David Šaman、Radek Pohl、Filip Teplý、Lubomír Pospíšil
DOI:10.1002/cplu.202000151
日期:2020.10
are structurally linked to helicenes and viologens, and they represent an attractive field of research in chemistry and medicinal chemistry. In the present work they were used as catalysts for the synthesis of 1,2,3,4‐tetrahydroquinolines in good yields by the Povarov reaction. The substrate scope and the capability of different helquats to promote Povarov reactions are demonstrated. Studies to elucidate
Helquats(HQs)在结构上与螺旋藻和紫罗兰素联系在一起,它们代表了化学和药物化学领域的一个有吸引力的研究领域。在目前的工作中,它们被用作通过Povarov反应以高收率合成1,2,3,4-四氢喹啉的催化剂。证明了底物的范围和不同头盔促进Povarov反应的能力。阐明机理细节的研究表明,盔红素通过阳离子自由基机理充当单电子转移氧化剂。对HQs催化活性的筛选证实,与二茂铁/二茂铁氧化还原对相比,活性HQ必须具有低于-8.67 eV的LUMO能量和标准氧化还原电势(低于负值)高于-1.2V。