Synthesis of 3-nitro- and 3-aminoquinoline-2,4-diones. An unexpected route to 3-hydroxyquinoline-2,4-diones
作者:Wolfgang Stadlbauer、Herbert Lutschounig、Gerda Schindler、Theo Witoszynskyj、Thomas Kappe
DOI:10.1002/jhet.5570290627
日期:1992.10
Nitration of 3-substituted-4-hydroxy-2(1H)-quinolones 1 with nitric acid leads either to 3-nitro- 2 or 3-hydroxyquinolinediones 3, depending on the reaction conditions. 3-Substituted-3-hydroxyquinolinediones 3 are also obtained by oxidative hydroxylation with peracetic acid. Amination of 3-substituted-3-chloroquinolinediones 4 with ammonium hydroxide predominantly leads again to 3-substituted-3-hy
根据反应条件,用硝酸硝化3-取代的-4-羟基-2(1 H)-喹诺酮1可以生成3-硝基-2或3-羟基喹啉二酮3。3-取代的-3-羟基喹啉二酮3也可以通过用过乙酸氧化羟基化而获得。用氢氧化铵胺化3-取代的3-氯喹啉二酮4主要再次导致3-取代的-3-羟基喹啉二酮3,仅在一种情况下可以分离3-氨基喹啉二酮5。用吗啉或吡啶作为胺,获得了预期的3-氨基喹啉二酮6和7。