Treatment of N-(o-arylbenzyl)trifluoromethanesulfonamides with 1,3-diiodo-5,5-dimethylhydantoin in 1,2-dichloroethane under irradiation with a tungsten lamp, followed by the reaction with ^tBuOK gave the corresponding 6-arylphenanthridines and 6-unsubstituted phenanthridines in good to moderate yields, respectively. The reaction proceeds through an oxidative cyclization onto the aromatic ring by sulfonamidyl radicals formed from the N-iodosulfonamides. The present reaction is a one-pot method for the preparation of both 6-arylphenanthridines and 6-unsubstituted phenanthridines from N-(o-arylbenzyl)trifluoromethanesulfonamides under transition-metal-free conditions. © 2020 Elsevier Science. All rights reserved.

在钨灯的照射下，在1,2-二氯乙烷中用1,3-二碘-5,5-二甲基乙内酰脲处理N-（邻芳基苄基）三氟甲磺酰胺，然后与^t BuOK反应，得到相应的6-芳基菲啶和6 -未取代的菲啶分别以良好至中等的产率。该反应通过由N-碘磺酰胺形成的磺酰胺基，通过氧化环化反应进行到芳环上。本反应是一锅法，可从N-（o）制备6-芳基菲啶和6-未取代的菲啶-芳基苄基）三氟甲磺酰胺在无过渡金属的条件下。©2020爱思唯尔科学。版权所有。