A Comparative Study of Synthetic Approaches to 1-Methyl-2,5,8(1<i>H</i>)-quinolinetrione and 4-Methyl-2,5,8(1<i>H</i>)-quinolinetrione
作者:C. Avendaño、E. de la Cuesta、C. Gesto
DOI:10.1055/s-1991-26557
日期:——
The best overall yield for 1-methyl-2,5,8(1H)-quinolinetrione was obtained by the dichromate oxidation of 1-methyl-8-hydroxy-2-quinolone. 4-Methyl-2,5,8(1H)-quinolinetrione was synthesized by acetoacetylation of 2,5-dimethoxyaniline with 2,2,6-trimethyl-4H-1,3-dioxin-4-one followed by oxidation with ceric ammonium nitrate.
1-甲基-2,5,8(1H)-喹啉三酮的最佳总产率是通过对1-甲基-8-羟基-2-喹啉进行重铬酸盐氧化获得的。4-甲基-2,5,8(1H)-喹啉三酮是通过对2,5-二甲氧基苯胺进行乙酰乙酰化,使用2,2,6-三甲基-4H-1,3-二噁烷-4-酮,随后用铈铵硝酸盐氧化合成的。