A new series of 2,3-disubstituted quinazolinones was synthesised via the reaction of readily obtainable 2-thioxo-3-phenylquinazolin-4(3 H)-one 1 with ethyl chloroacetate followed by hydrazinolysis to afford the hydrazide 3. This was allowed to react with different electrophilic reagents such as carbon disulfide, phenyl isothiocyanate, β-diketones, anhydrides, acrylonitrile, ethyl cinnamate, aldehydes, arylidene malononitrile and lauroyl chloride. Some of the newly synthesised compounds showed promising anti-inflammatory activities.
通过将容易获得的 2-硫酮-3-苯基喹唑啉-4(3 H)-酮 1 与氯乙酸乙酯反应,然后进行酰肼分解,得到酰肼 3,合成了一系列新的 2,3-二取代喹唑啉酮。3 与不同的亲电试剂发生反应,如二硫化碳、异硫氰酸苯酯、β-二酮、酸酐、丙烯腈、肉桂酸乙酯、醛、亚芳基丙二腈和月桂酰氯。一些新合成的化合物显示出良好的抗炎活性。