Synthesis of new pyrazolo[4,3-<i>c</i>]quinolin-3-one derivatives and some oxazolo[4,5-<i>c</i>]quinoline-2,4-diones
作者:Lhassane Ismaïli、Bernard Refouvelet、Jean François Robert
DOI:10.1002/jhet.5570360323
日期:1999.5
The new pyrazolo[4,3-c]quinolin-3-one derivatives 3a-c and 6a-c were prepared by the following three steps: first the preparation of ethyl 4-hydroxyquinoline-3-carboxylate derivatives 1 and 4 by reaction of isatoic anhydrides and ethyl malonate and ethyl acetoacetate respectively, then chloration of 1 and 4 with phosphorus oxychloride to give 2 and 5 and finally the condensation of 2 and 5 with hydrazine
通过以下三个步骤制备新的吡唑并[4,3 - c ]喹啉-3-酮衍生物3a-c和6a-c:首先通过与下列物质的反应制备4-羟基喹啉-3-羧酸乙酯衍生物1和4。分别用二酸酐,丙二酸乙酯和乙酰乙酸乙酯,然后用氯氧化磷将1和4氯化,得到2和5,最后将2和5与肼及其衍生物缩合。此外,成功合成了恶唑并[4,5 - c ]喹啉-2,4-二酮9a-f 被报道。