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.
从角螺环并联的硒代二氮杂喹啉起始合成5,6-和7,8-二氨基喹啉衍生物。对吡啶酮环的简单氯化,然后对1,2,5-硒代二氮杂啉环进行还原脱硒作用,得到新型的4-氯-邻二氨基喹啉。对4-氯-7,8-二氨基喹啉进行脱氯处理,得到7,8-二氨基喹啉盐酸盐,成功地作为合成紧缩氮杂环的起始材料。