Synthesis and toxicity towards normal and cancer cell lines of benzimidazolequinones containing fused aromatic rings and 2-aromatic ring substituents
摘要:
A facile 6-exo-trig cyclization of sigma-aromatic radicals has allowed the synthesis of various aromatic ring fused benzimidazoles and benzimidazolequinones. The most highly conjugated naphthyl fused benzimidazolequinone, (5-methyl-5,6-dihydrobenzimidazo[2,1-a]benzo[f]isoquinoline-8,11-dione) showed the highest specificity towards human cervical (HeLa) and prostate (DU145) cancer cell lines with little toxicity towards a human normal (GM00637) cell line at doses of <1 mu M. In contrast, 2-aromatic ring substituted (benzimidazole-4,7-diones) analogues, benzimidazolequinone with a pyridine ring and mitomycin C were more toxic than the highly conjugated naphthyl fused benzimidazolequinone towards the normal cell line. (C) 2010 Elsevier Masson SAS. All rights reserved.
Synthesis of aryl ring-fused benzimidazolequinones using 6-exo-trig radical cyclizations
摘要:
The preparation of alicyclic ring-fused tetracyclic and pentacyclic benzimidazoles containing one and two fused aryl rings, respectively, is achieved conveniently in three steps, including Bu3SnH-mediated 6-exo-trig cyclization of sigma-aryl radicals generated from 1-allyl-2-(omega-bromoaryl)benzimidazoles. Inclusion Of 4,7-dimethoxy substituents on the radical precursors allows access to aryl ring-fused benzimidazolequitiones, a Unique family of potential bioreductive anti-cancer agents. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis of aryl ring-fused benzimidazolequinones using 6-exo-trig radical cyclizations
作者:Eoin Moriarty、Fawaz Aldabbagh
DOI:10.1016/j.tetlet.2009.07.023
日期:2009.9
The preparation of alicyclic ring-fused tetracyclic and pentacyclic benzimidazoles containing one and two fused aryl rings, respectively, is achieved conveniently in three steps, including Bu3SnH-mediated 6-exo-trig cyclization of sigma-aryl radicals generated from 1-allyl-2-(omega-bromoaryl)benzimidazoles. Inclusion Of 4,7-dimethoxy substituents on the radical precursors allows access to aryl ring-fused benzimidazolequitiones, a Unique family of potential bioreductive anti-cancer agents. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis and toxicity towards normal and cancer cell lines of benzimidazolequinones containing fused aromatic rings and 2-aromatic ring substituents
作者:Eoin Moriarty、Miriam Carr、Sarah Bonham、Michael P. Carty、Fawaz Aldabbagh
DOI:10.1016/j.ejmech.2010.05.025
日期:2010.9
A facile 6-exo-trig cyclization of sigma-aromatic radicals has allowed the synthesis of various aromatic ring fused benzimidazoles and benzimidazolequinones. The most highly conjugated naphthyl fused benzimidazolequinone, (5-methyl-5,6-dihydrobenzimidazo[2,1-a]benzo[f]isoquinoline-8,11-dione) showed the highest specificity towards human cervical (HeLa) and prostate (DU145) cancer cell lines with little toxicity towards a human normal (GM00637) cell line at doses of <1 mu M. In contrast, 2-aromatic ring substituted (benzimidazole-4,7-diones) analogues, benzimidazolequinone with a pyridine ring and mitomycin C were more toxic than the highly conjugated naphthyl fused benzimidazolequinone towards the normal cell line. (C) 2010 Elsevier Masson SAS. All rights reserved.