title: New syntheses of 5,6- and 7,8-diaminoquinolines.
abstract: The synthesis of 5,6- and 7,8-diaminoquinoline derivatives starting from angularly annelated selenadiazoloquinolones is presented. Simple chlorination of the pyridone ring followed by reductive deselenation of the 1,2,5-selenadiazole ring afforded novel 4-chloro-o-diaminoquinolines. Dechlorination of 4-chloro-7,8-diaminoquinoline gave 7,8-diaminoquinoline hydrochloride which was successfully employed as starting material in the synthesis of condensed nitrogen heterocycles.
authors.affiliation: Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 38 Bratislava, Slovakia.
authors.forename: Maroš
authors.initials: M
authors.lastname: Bella
authors.affiliation: Department of Organic Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, SK-812 37 Bratislava, Slovakia.
authors.forename: Viktor
authors.initials: V
authors.lastname: Milata
keywords: chlorination; deselenation; nitrogen heterocycles; o-diaminoquinolines; selenadiazoloquinolones