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.
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.
Copper-Catalyzed Synthesis of Phenanthridine Derivatives under an Oxygen Atmosphere Starting from Biaryl-2-carbonitriles and Grignard Reagents
作者:Line Zhang、Gim Yean Ang、Shunsuke Chiba
DOI:10.1021/ol101490n
日期:2010.8.20
A copper-catalyzedsynthesis of phenanthridine derivatives was developed startingfrom biaryl-2-carbonitriles and Grignard reagents. The present transformation is carried out by a sequence of nucleophilic addition of Grignard reagents to biaryl-2-carbonitriles to form N-H imines and their Cu-catalyzed C−N bond formation on the aromatic C−H bond, where molecular oxygen is a prerequisite to achieve the
Base‐Promoted Aerobic Oxidation/Homolytic Aromatic Substitution Cascade toward the Synthesis of Phenanthridines
作者:Debabrata Maiti、Atreyee Halder、Suman De Sarkar
DOI:10.1002/adsc.201900995
日期:2019.11.5
transition metal‐free synthesis of polysubstituted phenanthridines from abundant starting materials like benzhydrol and 2‐iodoaniline derivatives. The reaction involves sequential oxidation of alcohol and direct condensation reaction with the amine resulting in a C−N bond formation followed by a radical C−C coupling in a cascade sequence. The used base potassium tert‐butoxide plays a dual role in dehydrogenation
Irradiation of hydrazines with visible-light in the presence of organic dye eosin B generates various types of functional radicals, which are trapped by 2-isocyanobiphenyls to give 6-substituted phenanthridines.