Rapid synthesis of polysubstituted phenanthridines from simple aliphatic/aromatic nitriles and iodo arenes <i>via</i> Pd(<scp>ii</scp>) catalyzed domino C–C/C–C/C–N bond formation
An efficient and straightforward method has been developed for the synthesis of polysubstituted phenanthridines from simple aryl iodides and alkyl/aryl nitriles via the palladium-catalyzed nucleophilic addition of aryl iodides to nitriles followed by cascade formation of C–C and C–N bonds viz. in situ generated imine directed sequential two fold C–H activation.
Preparation of phenanthridines from N-(o-arylbenzyl)trifluoromethanesulfonamides with 1,3-diiodo-5,5-dimethylhydantoin
作者:Kei Yanai、Hideo Togo
DOI:10.1016/j.tet.2020.131503
日期:2020.10
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
Transition-metal-free, visible-light induced cyclization of arylsulfonyl chlorides with 2-isocyanobiphenyls to produce phenanthridines
作者:Lijun Gu、Cheng Jin、Jiyan Liu、Hongyan Ding、Baomin Fan
DOI:10.1039/c4cc01487a
日期:——
A visible-light promoted transformation of 2-isocyanobiphenyls and arylsulfonyl chlorides for the synthesis of phenanthridines under oxidant-free and transition-metal-free conditions was described.
2-异氰基联苯和芳基磺酰氯在无氧化剂和过渡金属的条件下,经可见光促进转化合成菲啰啉。
Preparation of Substituted Phenanthridines from the Coupling of Aryldiazonium Salts with Nitriles: A Metal Free Approach
作者:Mani Ramanathan、Shiuh-Tzung Liu
DOI:10.1021/acs.joc.5b00579
日期:2015.5.15
A transition metal free approach for the synthesis of substituted phenanthridines from the coupling reaction of aryldiazonium tetrafluoroborates with nitriles has been developed. This operationally simple protocol proceeds through a substitution of aryldiazonium with nitriles followed by an intramolecular arylation to provide the corresponding phenanthridines in moderate to excellent yields.