Efficient Synthesis of Phenanthridines Using Hendrickson Reagent Initiated Cascade Reaction under Mild Conditions
作者:Lin Chen、Zhu-Jun Yao、Jie Xi、Qing-Li Dong、Guan-Sai Liu、Shaozhong Wang
DOI:10.1055/s-0030-1258081
日期:2010.7
A number of variously substituted phenanthridines have been synthesized using the newly developed methodology under mild conditions. The Hendrickson reagent initiated cascade annulation, which is composed of a mild conversion of stable amide precursor to highly reactive imido-carbonium intermediate and a subsequent intramolecular Friedel-Crafts reaction, successfully served as the key method.
Intramolecular Direct C–H Bond Arylation from Aryl Chlorides: A Transition-Metal-Free Approach for Facile Access of Phenanthridines
作者:Yinuo Wu、Shun Man Wong、Fei Mao、Tek Long Chan、Fuk Yee Kwong
DOI:10.1021/ol302489n
日期:2012.10.19
A C-H arylation with aryl chloride Is made viable through a transition-metal-free approach. In the presence of a simple diol associating with KOt-Bu, various phenanthridine derivatives can be conveniently accessed. In particular, only 10 mol % of simple and inexpensive ethylene glycol is required for this protocol. These results represent the first general examples of aryl chloride/C-H coupling under transition-metal-free conditions.
68. Potential trypanocides of the N-heterocyclic series. Part III. Alkoxy- and hydroxy-phenanthridinium salts