Molecular rearrangement of 1-substituted 3-aminoquinoline-2,4-diones in their reaction with urea and nitrourea synthesis and transformations of reaction intermediates
作者:Antonín Klásek、Michal Kovář、Ignác Hoza、Antonín Lyčka、Michal Holčapek
DOI:10.1002/jhet.5570430517
日期:2006.9
1-Substituted 3-alkyl/aryl-3-amino-1H,3H-quinoline-2,4-diones (6) react with nitrourea to give 3-ureido-1H,3H-quinoline-2,4-diones (10), 9b-hydroxy-3,3a,5,9b-tetrahydro-1H-imidazo[4,5-c]quinoline-2,4-diones (11), and 3,3a-dihydro-5H-imidazo[4,5-c]quinoline-2,4-diones (12). Compounds 11 were dehydrated to 12 by the action of phosphorus pentoxide. All three types of compounds rearrange in boiling acetic
1-取代的3-烷基/芳基-3-氨基-1 H,3 H-喹啉-2,4-二酮(6)与硝基脲反应生成3-ureido-1 H,3 H-喹啉-2,4-二酮(10),9b-羟基-3,3a,5,9b-四氢-1 H-咪唑并[4,5 - c ]喹啉-2,4-二酮(11)和3,3a-二氢-5 H -咪唑并[4,5 - c ]喹啉-2,4-二酮(12)。化合物11脱水成12在五氧化二磷的作用下。所有三种类型的化合物都在沸腾的乙酸中重排,从而产生三种不同类型的分子重排产物。讨论了提出的反应机理。