Photocyclization synthesis of phenanthridine and its derivatives under direct dehydrogenation conditions
作者:Wen-Qing Zhu、Jin Zhang、Pan Fan、Lan-Ting Shi、Hong Li、Min-Ge Yang、Yang Li
DOI:10.1016/j.tetlet.2020.152734
日期:2021.2
synthesizing phenanthridines by photocyclization has been established. This method does not require inert gas protection, does not require transition metal catalysts and is environmentally friendly, efficient and convenient. It is proposed to use (E)-N,1-diphenylformimines as substrates to synthesize phenanthridine and its derivatives by ultraviolet light, which provides a new synthesis route for further research
An efficient gram-scale synthesis that uses a Suzuki cross-coupling reaction to yield 5-methyl-2,9-dimethoxyphenanthridinium chloride, a lycobetaine-tortuosine analogue and potent topoisomerase inhibitor, is presented.