Application of 9-ethyl[1,2,5]selenadiazolo[3,4-h]quinolones in the synthesis of tricyclic azoloquinolones
作者:Maroš Bella、Viktor Milata
DOI:10.1016/j.tet.2014.04.097
日期:2014.8
A series of tricyclic azoloquinolones was prepared by a novel approach based on the protection of a benzene-1,2-diamine moiety as 2,1,3-benzoselenadiazole ring. A new reductive deselenation of 9-ethylselenadiazolo[3,4-h]quinolones using zinc powder in acetic acid afforded 7,8-diamino-1-ethylquinolones in high yields. The obtained diaminoquinolones were employed as useful substrates in cyclocondensation
基于保护苯-1,2-二胺部分为2,1,3-苯并硒二唑环的新颖方法,制备了一系列三环氮杂喹诺酮类化合物。使用锌粉在乙酸中对9-乙基硒二氮杂[3,4- h ]喹诺酮进行新的还原脱硒,可以高收率得到7,8-二氨基-1-乙基喹诺酮。所获得的二氨基喹诺酮类用作环缩合反应中有用的底物,从而导致形成氮杂喹诺酮衍生物。