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
6-Arylphenanthridines from Aryl <i>o</i>
-Biaryl Ketones with 1,1,1,3,3,3-Hexamethyldisilazane and Molecular Iodine
作者:Eiji Kobayashi、Atsushi Kishi、Hideo Togo
DOI:10.1002/ejoc.201901278
日期:2019.11.30
Aryl biaryl ketones were transformed into 6‐arylphenanthridines efficiently by the reaction with 1,1,1,3,3,3‐hexamethyldisilazane in the presence of Sc(OTf)3 in toluene, followed by removal of the solvent, and the subsequent reaction with molecular iodine and K2CO3 in a mixture of THF and methanol.
在甲苯中Sc(OTf)3存在下,通过与1,1,1,1,3,3,3-六甲基二硅氮烷反应,将芳基联芳基酮有效地转化为6-芳基菲啶,然后除去溶剂,然后进行后续反应分子碘和THF和甲醇的混合物中的K 2 CO 3。
Preparation of Phenanthridines from <i>o</i>-Cyanobiaryls via Addition of Organic Lithiums to Nitriles and Imino Radical Cyclization with Iodine
作者:Atsushi Kishi、Katsuhiko Moriyama、Hideo Togo
DOI:10.1021/acs.joc.8b01688
日期:2018.9.21
methyllithium, ethylmagnesium bromide, butyllithium, phenyllithium, p-methylphenyllithium, etc., followed by the reaction with water and then with molecular iodine at 60 °C provided efficiently 6-methyl-, 6-ethyl-, 6-butyl-, 6-phenyl, 6-(p-methylphenyl)phenanthridines, etc., in good yields, respectively. Here, imines formed through the addition of carbanion onto the nitriles reacted with molecular iodine