Synthesis and antioxidant activity evaluation of new hexahydropyrimido[5,4-c]quinoline-2,5-diones and 2-thioxohexahydropyrimido[5,4-c]quinoline-5-ones obtained by Biginelli reaction in two steps
作者:Lhassane Ismaili、Arulraj Nadaradjane、Laurence Nicod、Catherine Guyon、Alain Xicluna、Jean-François Robert、Bernard Refouvelet
DOI:10.1016/j.ejmech.2007.07.012
日期:2008.6
New hexahydropyrimido[5,4-c]quinoline-2,5-diones and 2-thioxohexahydropyrimido[5,4-c]quinoline-5-ones were prepared in two steps from ethyl 4-phenyl-6-methyl-2-oxo tetrahydropyrimidine-5-carboxylates or 4-phenyl-6-methyl-2-thioxotetrahydropyrimidine-5-carboxylates, previously prepared by Biginelli reaction using appropriate aldehyde, urea derivatives and ethyl acetoacetate. Their antioxidant properties
由乙基4-苯基-6-甲基-2-氧合两步制备新的六氢嘧啶并[5,4-c]喹啉-2,5-二酮和2-硫氧六氢嘧啶并[5,4-c]喹啉-5-酮四氢嘧啶-5-羧酸盐或4-苯基-6-甲基-2-硫代四氢嘧啶-5-羧酸盐,以前是使用适当的醛,脲衍生物和乙酰乙酸乙酯通过Biginelli反应制备的。通过两种方法评估它们的抗氧化性能:对2,2-二苯基-1-吡啶并肼基(DPPH)自由基的清除作用和对羟基自由基的清除作用。结果表明,含有硫脲部分的化合物具有更好的活性。