Convergent Synthesis of 6-Substituted Phenanthridines via Anionic Ring Closure
作者:Morten Lysén、Jesper L. Kristensen、Per Vedsø、Mikael Begtrup
DOI:10.1021/ol0170051
日期:2002.1.1
[reaction: see text] The addition of organometallic derivatives to the cyano group of 2-(2-fluorophenyl)benzonitrile followed by intramolecular nucleophilic substitution produces 6-substituted phenanthridines. Alkyllithiums, aryllithiums, and sterically nondemanding lithiumamides reacted at -78 degrees C to produce the 6-substituted phenanthridines in 82-98% yield upon warming to room temperature
作者:W. Russell Bowman、Jessica E. Lyon、Gareth J. Pritchard
DOI:10.3998/ark.5550190.0013.714
日期:——
Two routes to phenanthridines are reported; a palladium-mediated route using imidoyl-selanides as precursors and a modified radicalroute using aryl imines as starting materials.
Palladium-Mediated Synthesis of Phenanthridines: The First Report of Palladium Insertion into Imidoyl Selenides
作者:Gareth Pritchard、W. Bowman、Jessica Lyon
DOI:10.1055/s-2008-1078246
日期:2008.8
Imidoyl phenyl selenides have been shown to be precursors to phenanthridines, when treated with Pd(PPh 3 ) 4 under reflux in toluene in the presence of a base, giving reasonable yields. It is proposed that insertion of palladium into the C-Se bond is followed by cyclisation onto a phenyl ring and subsequent aromatisation by elimination of HPdSePh.
Metal-Free Nitrogenation of 2-Acetylbiphenyls: Expeditious Synthesis of Phenanthridines
作者:Conghui Tang、Yizhi Yuan、Ning Jiao
DOI:10.1021/acs.orglett.5b00797
日期:2015.5.1
An intermolecular nitrogenation reaction toward the synthesis of phenanthridines has been developed. This metal-free protocol provides a novel nitrogen-incorporation transformation using azides as the nitrogen source. Phenanthridines, which are of great interest in pharmaceutical and medicinal chemistry, are synthesized efficiently in one step. Moreover, the byproducts derived from the Schmidt reaction are inhibited, which further demonstrated the high chemoselectivity of this transformation.
Katritzky, Alan R.; Yang, Baozhen, Journal of Heterocyclic Chemistry, 1996, vol. 33, # 3, p. 607 - 610