Azino-Fused Benzimidazolium Salts as DNA Intercalating Agents. 2.
作者:Joaquín Pastor、Jorge G. Siro、José L. García-Navío、Juan J. Vaquero、Julio Alvarez-Builla、Federico Gago、Beatriz de Pascual-Teresa、Manuel Pastor、M. Melia Rodrigo
DOI:10.1021/jo962055i
日期:1997.8.1
The synthesis of new pyrido[1,2-a]- and pyridazino[1,6-a]benzimidazolium salts by basic condensation of 1,3-disubstituted 2-alkylbenzimidazolium salts and 1,2-diketones and subsequent chemical transformations is described. The DNA-binding properties were examined by UV-vis spectroscopy, viscosimetric determinations, and molecular modeling techniques. The presence of a flat polycyclic hydrocarbon moiety such as a naphthalene-1,8-diyl or a biphenyl-o,o'-diyl, fused to the cationic heterocycle, appears to enhance the interaction with DNA. Variation of the substituents on the indole-like N will allow us to build up a new series of his-salts with bis-intercalating properties.
Microwave assisted Westphal condensation and its application to synthesis of sempervirine and related compounds
作者:T.S. Chinta Rao、Sanjay Saha、Gajendra B. Raolji、Balaram Patro、Prabhaker Risbood、Michael J. Difilippantonio、Joseph E. Tomaszewski、Sanjay V. Malhotra
DOI:10.1016/j.tetlet.2012.11.059
日期:2013.2
A concise synthesis of a potent lead in anticancer therapeutics, sempervirine, was achieved by one pot Westphal condensation, ester hydrolysis, and decarboxylation under microwave irradiation. The method was extended to the synthesis of several similar heterocycles.